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NXP Semiconductors

FXTH87E

FXTH87E, Family of Tire Pressure Monitor Sensors

FXTH87ERM

All information provided in this document is subject to legal disclaimers.

© NXP B.V. 2019. All rights reserved.

Reference manual

Rev. 5.0 — 4 February 2019

114 / 183

•

Optional continuous monitoring and decode of the LF detector.

•

Selectable MCU interrupt when a received data byte is ready in an LFR buffer, when

a Manchester error is detected in the frame, when an ID is received or when a valid

carrier has been detected.

14.2 Modes of operation

The LFR is a peripheral module on an MCU. After being configured by application

software, the LFR can operate autonomously to detect and verify incoming LF messages.

When a valid message or carrier pulse is received and verified the LFR can wake the

MCU from standby modes to read received data or act upon a carrier detection.
The primary modes of operation for the LFR are:

•

Disabled. Everything off and drawing minimal leakage current. LFR register contents

will be retained.

•

Carrier detect/listen. Minimum circuitry enabled to detect any incoming LF signal, check

it for the appropriate signal level, frequency and duration.

•

TPMS protocol verification.

•

Data reception.

14.3 Power management

In addition to using low power circuit design techniques, the LFR module provides

system-level features to minimize system energy requirements. In an MCU that includes

the LFR module, all MCU circuitry except a very low current 1-kHz oscillator (LFO) and

minimum regulator circuitry can be disabled. After a reset, the MCU would initialize the

LFR module and then enter a very low power standby mode (depending upon the MCU,

this could be lower than 1 uA for the MCU portion). The LFR module includes everything

it needs to periodically listen for LF messages, perform Manchester decoding, verify the

message telegram, and assemble incoming data into 8-bit bytes. The LFR does not wake

the MCU unless a valid message is being received and a data byte is ready to be read.
The LFR cycles between an off state, where everything is disabled, and an on state,

where it listens for a carrier signal. The on time is controlled by LFONTM[3:0] control bits

in the LFCTL2 register. The time between the start of each sample on time is controlled

by LFSTM[3:0] control bits in the LFCTL2 register. Even lower duty cycles can be

achieved by using the MCU to wake once per second and maintain a software counter

to delay for an arbitrarily long time before enabling the LFR to perform a series of carrier

detect cycles.
Within the LFR, circuits remain disabled until they are needed. When the LFR is listening

for a carrier signal, only a 1-kHz clock source, a portion of the input amplifier and a

periodic auto-zero are running. After a carrier signal is detected, with high enough

amplitude, frequency and duration the LFRO oscillator is enabled so the LFR can begin

to decode the incoming information.
The LFR module has a power up settling time of 2-LFO period before any active

operations. In the ON/OFF cycle, those 2 ms are hidden in the sampling time during the

off time.

14.4 Input amplifier

The LFR module receives LF modulated signals through a dedicated differential pair of

inputs which is connected to an external coil. The enable control (LFEN) allows the user

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Содержание FXTH87E

Страница 1: ...les representatives for performance attributes such as electrical mechanical and time based characteristics 2 Product profile 2 1 General description The FXTH87E is a small 7 x 7 mm fully integrated t...

Страница 2: ...e GPIO pins Four pins can be connected to optional internal pullups pulldowns and STOP4 wakeup interrupt Two of seven pins can be connected to a channel on the ADC10 Two of seven pins can be connected...

Страница 3: ...ge 11 cc 11 X axis 90 g range Z axis 300 g range cc 12 cc 12 X axis 90 g range Z axis 400 g range d Single digit or alphabetic character d Number or letter marketing suffix A Z a z or 0 9 2 5 Part mar...

Страница 4: ...2 CHAN LVD RTI TIMER MCU CORE S08 AVDD TEMP TEMP SENSOR AVDD AVSS PRESS SENSOR LFA PTA1 ADC10 10 BIT 6 CHAN BKGD PTA4 LFB 64 BYTE PARAMETER REGISTER XI XO RF MCU TRANSDUCERS TEMP RESTART OSC BIT RATE...

Страница 5: ...The various clock sources and their distribution are shown in Figure 2 All clock sources except the low frequency oscillator LFO can be turned off by software control in order to conserve power aaa 02...

Страница 6: ...ure port up The orientation of the internal Z axis accelerometer is shown in Figure 4 PTA3 LFA LFB BKGD PTA4 X0 X1 PTB1 PTA2 PTA1 RESET VDD VDDA VSSA VREG RF PTB0 N C N C N C N C N C ID feature on top...

Страница 7: ...D PTA4 15 BACKGROUND DEBUG mode enable LFB 16 LF receiver differential input channel B LFA 17 LF receiver differential input channel A PTA3 18 General purpose I O N C 19 20 21 22 23 No Connect Do not...

Страница 8: ...lication to ensure the pressure applied to all surfaces of the sensor remains equal The sensor is constructed from nonhermetic materials and should not be used as a seal between the tire pressure and...

Страница 9: ...AVSS and RVSS pins using a star connection such that each metal trace does not share any load currents with other external devices as shown in Figure 6 FXTH87E VDD Bypass capacitors closely coupled to...

Страница 10: ...map to keyboard Interrupt function bits 1 0 4 4 9 PTA 3 2 pins The PTA 3 2 pins are general purpose I O pin These two pins can be configured as normal bidirectional I O pin with programmable pullup or...

Страница 11: ...1 0 pins The PTB 1 0 pins are general purpose I O pins The PTB 1 0 pin functions become high impedance when the LF receiver has been enabled These two pins can be configured as nominal bidirectional I...

Страница 12: ...while the user program is running Non intrusive commands can be issued through the BKGD PTA4 pin while the MCU is in RUN mode non intrusive commands can also be executed when the MCU is in the ACTIVE...

Страница 13: ...n VLVDH or VLV DL rising VDD must rise above the LVI re arm voltage Upon wakeup from STOP1 mode the MCU will start up as from a power on reset POR by taking the reset vector Note If there are any pend...

Страница 14: ...es Specific to the tire pressure monitoring application the parameter registers and the LFO with wakeup timer are powered up at all times whenever voltage is applied to the supply pins The LFR detecto...

Страница 15: ...power is applied to the supply pins The contents of the parameter registers behave like RAM and are unaffected by any reset 5 5 4 4 LFO The LFO remains active regardless of any mode of operation 5 5...

Страница 16: ...ture restart will remain powered up if the TRE bit is set If the temperature restart level is reached the MCU will restart from the reset vector 5 5 5 RFM module in STOP modes The RFM s external cryst...

Страница 17: ...Parameter registers DFE0 DFDF User flash 8160 bytes User vectors Firmware flash 7008 bytes E000 DFFF E0A0 E09F Firmware jump table FBFF FC00 Protected coefficients 512 bytes Firmware flash 432 bytes...

Страница 18: ...irst 80 locations in the memory map these are accessible with efficient direct addressing mode instructions The parameter registers begin at address 0050 these are also accessible with efficient direc...

Страница 19: ...TAD 4 0 0001 PTAPE PTAPE 3 0 0002 Reserved 0003 PTADD PTADD 3 0 0004 PTBD PTBD 1 0 0005 PTBPE PTBPE 1 0 0006 Reserved 0007 PTBDD PTBDD 1 0 0008 Reserved 0009 Reserved 000A Reserved 000B Reserved 000C...

Страница 20: ...FCDTM 3 0 0023 LFCTL4 LFDRIE LFERIE LFCDIE LFIDIE DECEN VALEN TIMOUT 1 0 0024 LFS LFDRF LFERF LFCDF LFIDF LFOVF LFEOMF LPSM LFIAK 0025 LFDATA RXDATA 7 0 0026 LFIDL ID 7 0 0027 LFIDH ID 15 8 Table 9 LF...

Страница 21: ...RFD7 RFD 63 56 0044 RFD8 RFD 71 64 0045 RFD9 RFD 79 72 0046 RFD10 RFD 87 80 0047 RFD11 RFD 95 88 0048 RFD12 RFD 103 96 0049 RFD13 RFD 111 104 004A RFD14 RFD 119 112 004B RFD15 RFD 127 120 004C Reserv...

Страница 22: ...004F Reserved Note Shaded bits are recommended to only be controlled by firmware or factory test 6 4 High address registers High page registers are used much less often so they are located above 1800...

Страница 23: ...008F These registers are powered up at all times and may be used to store temporary or history data during the times that the MCU is in any of the STOP modes The parameter register at 008F is used by...

Страница 24: ...cy read accesses 6 7 2 Program and erase times Before any program or erase command can be accepted the FLASH clock divider register FCDIV must be written to set the internal clock for the FLASH module...

Страница 25: ...y time after the write to the memory array and before writing the 1 that clears FCBEF and launches the complete command Aborting a command in this way sets the FACCERR access error flag which must be...

Страница 26: ...rrent command completes then the charge pump will be disabled and high voltage removed from the array Start Write to FLASH to buffer address and data Write command to FCMD No Yes FPVIOL or FACCERR Wri...

Страница 27: ...ERR in FSTAT before any command can be processed Writing to a FLASH address before the internal FLASH clock frequency has been set by writing to the FCDIV register Writing to a FLASH address while FCB...

Страница 28: ...tionally by the application software FPROT can be written through background debug commands which allows a way to erase and reprogram a protected FLASH memory The block protection mechanism is illustr...

Страница 29: ...return all 0s Security is engaged or disengaged based on the state of nonvolatile register bits SEC 1 0 in the FOPT register During reset the contents of the nonvolatile location NVOPT are copied from...

Страница 30: ...ce by taking these steps 1 Disable any block protections by writing FPROT FPROT can be written only with BACKGROUND DEBUG commands not from application software 2 Mass erase FLASH if necessary 3 Blank...

Страница 31: ...clock divided by 8 if PRDIV8 1 by the value in the 6 bit DIV5 DIV0 field plus one The resulting frequency of the internal FLASH clock must fall within the range of 200 kHz to 150 kHz for proper FLASH...

Страница 32: ...tches the nonvolatile backdoor key NVBACKKEY through NVBACKKEY 7 in that order security is temporarily disengaged until the next MCU reset 6 FNORED Vector Redirection Disable When this bit is 1 then v...

Страница 33: ...t 7 6 5 4 3 2 1 0 R FPS7 FPS6 FPS5 FPS4 FPS3 FPS2 FPS1 FPDIS W 1 1 1 1 1 1 1 1 Reset This register is loaded from nonvolatile location NVPROT during reset 1 Background commands can be used to change t...

Страница 34: ...empt was made to erase or program a protected location 4 FACCERR Access Error Flag FACCERR is set automatically when the proper command sequence is not obeyed exactly the erroneous command is ignored...

Страница 35: ...for easy reference A few reset and interrupt sources including the computer operating properly COP watchdog and real time interrupt RTI are not part of on chip peripheral systems but are part of the s...

Страница 36: ...eset by writing any value to the address of SRS This write does not affect the data in the read only SRS Instead the act of writing to this address is decoded and sends a reset signal to the COP timer...

Страница 37: ...SR because the ISR could continue to be executed periodically even if the main application program fails When the MCU is in ACTIVE BACKGROUND DEBUG mode or either Stop1 or Stop4 modes the COP timer is...

Страница 38: ...WI instruction and consists of Saving the CPU registers on the stack Setting the I bit in the CCR to mask further interrupts Fetching the interrupt vector for the highest priority interrupt that is cu...

Страница 39: ...addresses Towards LOWER addresses 7 0 1 2 3 4 5 5 4 3 2 1 High byte H of index register is not automatically stacked Figure 12 Interrupt stack frame 7 5 2 Vector summary Table 31 provides a summary of...

Страница 40: ...mpletely sent 9 DFEC DFED Vrf RFM RFEF RFIEN Interrupt from the RFM when transmission error detected 8 DFEE DFEF Vsmi SMI SMIF SMIIE Interrupt from the Sensor Measurement Interface when the channel se...

Страница 41: ...voltage drops below the VPOR level the POR circuit will cause a reset condition As the supply voltage rises the LVD circuit will hold the chip in reset until the supply has risen above the level dete...

Страница 42: ...s The keyboard interrupts can be used to wake the MCU These are assigned to specific general I O pins as given in Table 33 Note Regarding wake up from Stop1 the reset vector is accessed taking precede...

Страница 43: ...ck source is the LFO 1 Real time interrupt request clock source is the HFO MCU must be in the RUN mode 4 RTIE RTIF Interrupt Enable The RTIE bit enables RTI interrupts if written with a one Reset clea...

Страница 44: ...registers in the high page register space are related to reset and interrupt systems 7 11 1 System Reset Status Register SRS The SRS register at 1800 includes seven read only status flags to indicate...

Страница 45: ...er 0 Reset not caused by an illegal opcode 1 Reset caused by an illegal opcode 3 ILAD Illegal Address This bit indicates reset was caused by an attempt to access either data or an instruction at an un...

Страница 46: ...either a very high or very low temperature This bit is cleared by an MCU reset 0 Temperature restart disabled 1 Temperature restart enabled 2 TRH Temperature Restart Level This control bit selects wh...

Страница 47: ...leared by a reset and can be written at any time 00 Bus Frequency 4 MHz HFO 8 MHz 01 Bus Frequency 2 MHz HFO 4 MHz 10 Bus Frequency 1 MHz HFO 2 MHz 11 Bus Frequency 0 5 MHz HFO 1 MHz 7 11 4 System Pow...

Страница 48: ...he BGBE bit is used to enable an internal buffer for the band gap voltage reference for use by the ADC module on one of its internal channels 0 Band gap buffer disabled 1 Band gap buffer enabled 7 11...

Страница 49: ...LVWF Low Voltage Warning Flag The LVWF bit indicates the low voltage warning status 0 Low voltage warning not present 1 Low voltage warning is present or was present 6 LVWACK Low Voltage Warning Ackn...

Страница 50: ...es 1808 and 1809 revert to the PMCRSC and PMCSC1 registers and the FRC remains functioning as last controlled while FPAGE had been 1 1 PMCT bits 7 and 5 functions as described above and addresses 1808...

Страница 51: ...MCU goes into a STOP mode Writes to any of these bits are ignored Table 52 SIM STOP exit status SIMSES address 180D Bit 7 6 5 4 3 2 1 0 R KBF IRQF TRF PWUF LFF RFF W Reset 0 0 0 0 0 0 0 0 Reserved Dow...

Страница 52: ...Port B registers for additional details regarding mutually exclusive operations The peripheral modules have priority over the general purpose I O so that when a peripheral is enabled the general purpo...

Страница 53: ...row com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 54: ...o avoid a floating input that could cause excessive supply current IDD When the device comes out of the reset state the NXP supplied firmware will not configure any of the general purpose I O pins Rec...

Страница 55: ...rites are latched into all bits of this register For port A pins that are configured as outputs the logic level is driven out the corresponding MCU pin Reset forces PTAD to all 0s but these 0s are not...

Страница 56: ...block is disabled port B pins operate as described here Table 61 Port B data register PTBD address 0004 Bit 7 6 5 4 3 2 1 0 R W PTBD 1 0 Reset 0 0 0 0 0 0 0 0 Reserved Downloaded from Arrow com Downlo...

Страница 57: ...descriptions Field Description 1 0 PTBDD 1 0 Data Direction for Port B Bit n These read write bits control the direction of port B pins and what is read for PTBDD reads 0 Input output driver disabled...

Страница 58: ...BACKGROUND mode When the microcontroller is in ACTIVE BACKGROUND mode the KBI will continue to operate normally 9 3 Block diagram The block diagram for the keyboard interrupt module is shown in Figure...

Страница 59: ...aded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow co...

Страница 60: ...select control bits Table 72 KBI edge select register address 000E Bit 7 6 5 4 3 2 1 0 R W KBEDG3 KBEDG2 KBEDG1 KBEDG0 Reset 0 0 0 0 0 0 0 0 Downloaded from Arrow com Downloaded from Arrow com Downloa...

Страница 61: ...ted to the CPU Clearing of KBF is accomplished by writing a 1 to KBACK in KBISC 9 6 2 Edge and level sensitivity A valid edge or level on an enabled KBI pin will set KBF in KBISC If KBIE in KBISC is s...

Страница 62: ...tions treat X as a second general purpose 8 bit register Seven addressing modes Inherent Operands in internal registers Relative 8 bit signed offset to branch destination Immediate Operand in next obj...

Страница 63: ...registers H and X which often work together as a 16 bit address pointer where H holds the upper byte of an address and X holds the lower byte of the address All indexed addressing mode instructions u...

Страница 64: ...rrupt and return operations load the program counter with an address other than that of the next sequential location This is called a change of flow During reset the program counter is loaded with the...

Страница 65: ...result setting bit 7 of the result Simply loading or storing an 8 bit or 16 bit value causes N to be set if the most significant bit of the loaded or stored value was 1 0 Non negative result 1 Negati...

Страница 66: ...inue at the branch destination address 10 4 3 Immediate addressing mode IMM In immediate addressing mode the operand needed to complete the instruction is included in the object code immediately follo...

Страница 67: ...e instruction as the address of the operand needed to complete the instruction 10 4 6 6 SP Relative 8 Bit Offset SP1 This variation of indexed addressing uses the 16 bit value in the stack pointer SP...

Страница 68: ...e routine After the CCR contents are pushed onto the stack the I bit in the CCR is set to prevent other interrupts while in the interrupt service routine Although it is possible to clear the I bit wit...

Страница 69: ...e Recovery from STOP mode depends on the particular HCS08 and whether the oscillator was stopped in STOP mode Refer to the Section 5 Modes of operation for more details 10 5 5 BGND instruction The BGN...

Страница 70: ...nloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 71: ...evaluates to a 16 bit value Because the HCS08 has a 16 bit address bus this can be either a signed or an unsigned value rel Any label or expression that refers to an address that is within 128 to 127...

Страница 72: ...ded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Страница 73: ...oaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow c...

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Страница 78: ...Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Download...

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Страница 81: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Dow...

Страница 82: ...2 DIR 44 1 LSRA 1 INH 54 1 LSRX 1 INH 64 5 LSR 2 IX1 74 4 LSR 1 IX 84 1 TAP 1 INH 94 2 TXS 1 INH A4 2 AND 2 IMM B4 3 AND 2 DIR C4 4 AND 3 EXT D4 4 AND 3 IX2 E4 3 AND 2 IX1 F4 3 AND 1 IX Downloaded fr...

Страница 83: ...2 DIR 2F 3 BIH 2 rel 3F 5 CLR 2 DIR 4F 1 CLRA 1 INH 5F 1 CLRX 1 INH 6F 5 CLR 2 IX1 7F 4 CLR 1 IX 8F 2 WAIT 1 INH 9F 1 TXA 1 INH AF 2 AIX 2 IMM BF 3 STX 2 DIR CF 4 STX 3 EXT DF 4 STX 3 IX2 EF 3 STX 2 I...

Страница 84: ...Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Ar...

Страница 85: ...LK 1 0 unused 1 1 Internal DX pin 11 2 1 Block diagram Figure 18 shows the structure of a TPM1 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com D...

Страница 86: ...onal information about shared pin functions Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Страница 87: ...s CPWMS 0 All TPM channels operate as input capture output compare or edge aligned PWM mode as selected by the MSnB MSnA control bits in each channel s status and control register 1 All TPM channels o...

Страница 88: ...Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from A...

Страница 89: ...m Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from...

Страница 90: ...election CPWMS MS0B MS0A ELS0B ELS0A Mode Configuration X XX 00 Pin not used for TPM1 channel use as an external clock for the TPM1 or revert to general purpose I O 01 Capture on rising edge only 10 C...

Страница 91: ...LS1A Reset 0 0 0 0 0 0 0 0 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from A...

Страница 92: ...as a software timer that does not require the use of a pin Table 93 Mode edge and level selection CPWMS MS1B MS1A ELS1B ELS1A Mode Configuration X XX 00 Pin not used for TPM1 channel use as an externa...

Страница 93: ...or A 16 bit modulo register also is associated with Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Ar...

Страница 94: ...wed The enable signal selects between software polling TOIE 0 where no hardware interrupt is generated or interrupt driven operation TOIE 1 where a static hardware interrupt is automatically generated...

Страница 95: ...f a 16 bit register have been written This coherency sequence can be manually reset by writing to the channel status control register TPM1CnSC An output compare event sets a flag bit CHnF that can opt...

Страница 96: ...tive bit 15 set the duty cycle will be 0 If TPM1CnVH TPM1CnVL is a positive value bit 15 clear and is greater than the nonzero modulus setting the duty cycle will be 100 because the duty cycle compare...

Страница 97: ...cy mechanism for TPM1C0VH TPM1C0VL 11 6 TPM1 interrupts The TPM1 generates an optional interrupt for the main counter overflow and an interrupt for each channel The meaning of channel interrupts depen...

Страница 98: ...ing timer interrupt flags When a channel is configured as an output compare channel the interrupt flag is set each time the main timer counter matches the 16 bit value in the channel value register Th...

Страница 99: ...rt them into an 8 bit 9 bit or 10 bit transfer function These measurement accuracy specifications cannot be guaranteed if the user creates custom software routines to convert these measurements For ad...

Страница 100: ...wnloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arro...

Страница 101: ...tion regarding the recommended use of the accelerometer self test features Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 102: ...com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded fro...

Страница 103: ...m Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downlo...

Страница 104: ...om Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downl...

Страница 105: ...Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Download...

Страница 106: ...om Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downl...

Страница 107: ...dic reset of the MCU Both the wakeup time counter and the periodic reset timer are incrementing counters that generate their interrupt or reset when the desired count is Downloaded from Arrow com Down...

Страница 108: ...wnloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arro...

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Страница 111: ...w com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded f...

Страница 112: ...Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloa...

Страница 113: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Dow...

Страница 114: ...e sampling time during the off time 14 4 Input amplifier The LFR module receives LF modulated signals through a dedicated differential pair of inputs which is connected to an external coil The enable...

Страница 115: ...until it is cleared before it continues the alternating cycle of on time and off time starting with an off time In data mode when a carrier is detected the averaging filter is powered on and the LFR c...

Страница 116: ...oaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow c...

Страница 117: ...logic zero or a logic one The LFRO clock source is 32 times the target data rate The LFRO is used for decoding data and also sequencing auto zero operations Downloaded from Arrow com Downloaded from...

Страница 118: ...d from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com D...

Страница 119: ...Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Ar...

Страница 120: ...com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded fro...

Страница 121: ...mation When power is applied to the MCU the LFR must be initialized and configured before it can begin to receive LF messages Several systems in the LFR require factory trimming Downloaded from Arrow...

Страница 122: ...rom Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Down...

Страница 123: ...ownloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arr...

Страница 124: ...nloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 125: ...ery 1 ms Therefore LFR detection times of 1024 2048 4096 and 8192 sec the auto zero sequence will be done at each 1 ms interval This auto zero sequence lasts for 64 sec If the carrier is detected agai...

Страница 126: ...Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Download...

Страница 127: ...ded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Страница 128: ...row com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 129: ...wnloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arro...

Страница 130: ...loaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 131: ...Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Ar...

Страница 132: ...om Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downl...

Страница 133: ...loaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 134: ...om Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downl...

Страница 135: ...row com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 136: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Do...

Страница 137: ...m Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downlo...

Страница 138: ...row com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 139: ...Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from A...

Страница 140: ...rom Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Down...

Страница 141: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Do...

Страница 142: ...om Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downl...

Страница 143: ...ow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 144: ...com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded fr...

Страница 145: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Do...

Страница 146: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Dow...

Страница 147: ...m Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from...

Страница 148: ...oaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow c...

Страница 149: ...oaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow c...

Страница 150: ...om Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downl...

Страница 151: ...Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Ar...

Страница 152: ...ow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 153: ...aded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow co...

Страница 154: ...Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloa...

Страница 155: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Do...

Страница 156: ...ed from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Страница 157: ...Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloa...

Страница 158: ...nloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 159: ...rrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloade...

Страница 160: ...w com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded f...

Страница 161: ...com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded fr...

Страница 162: ...ownloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arr...

Страница 163: ...nloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 164: ...wnloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arro...

Страница 165: ...d from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com D...

Страница 166: ...ded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Страница 167: ...row com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 168: ...nloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 169: ...rom Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Down...

Страница 170: ...nloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

Страница 171: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Dow...

Страница 172: ...Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Download...

Страница 173: ...ed from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com...

Страница 174: ...row com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded...

Страница 175: ...m Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downlo...

Страница 176: ...ed version of a document is for reference only The English version shall prevail in case of any discrepancy between the translated and English versions 20 3 Trademarks Notice All referenced brands pro...

Страница 177: ...wnloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arro...

Страница 178: ...0 Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from...

Страница 179: ...from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Do...

Страница 180: ...w com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded f...

Страница 181: ...oaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow c...

Страница 182: ...rrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloade...

Страница 183: ...nloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow com Downloaded from Arrow...

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