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Texas Instruments Boomer LM49360, Руководство пользователя

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Texas Instruments Boomer LM49360 Скачать руководство пользователя страница 97

ALC Overview

The Automatic Level Control (ALC) system can be used to regulate the audio output level to a user defined target level. The ALC
feature is especially useful whenever the level of the audio input is unknown, unpredictable, or has a large dynamic range. The
main purpose of the ALC is to optimize the dynamic range of the audio input to audio output path.

There are two separate and independent ALC circuits in the LM49360. One of the ALC circuits is located within the DAC DSP
effects block. The other ALC circuit is integrated into the ADC DSP effects block. The DAC ALC controls the DAC digital gain. The
ADC ALC controls the mono/auxiliary input amplifier gain or microphone preamplifier gain. The dual ALCs can be used to regulate
the level of the analog (AUX, MONO, MIC) and digital (Port1 Data In, Port2 Data In) audio inputs. The ALC regulated output can
be routed to any of the LM49360’s amplifier outputs for playback. The ALC regulated output can also be routed to Audio Port1 or
Audio Port2 for digital data transmission via I

2

S or PCM.

Only audio inputs that are considered signals (rather than noise) are sent to the ALC’s peak detector block. The peak detector
compares the level of the audio input versus the ALC target level (TARGET_LEVEL). Signals lower than the target level will be
amplified and signals higher than the target level will be attenuated. Any audio input that is lower than the level specified by the
noise floor level (NOISE_FLOOR) will be considered as noise and will be gated from the ALC’s peak detector in order to avoid
noise pumping. So it is important to set NOISE_FLOOR to correlate with the signal to noise ratio of the corresponding audio path.
In some instances (ie. Conference calls), it may be desirable to mute audio input signals that consist solely of background noise
from the audio output. This is accomplished by enabling the ALC’s noise gate (NG_ENB). When the noise gate is enabled, signals
lower than the noise floor level will be muted from the audio output.

If the audio input signal is below the target level, the ALC will increase the gain of the corresponding volume control until the signal
reaches the target level. The rate at which the ALC performs gain increases is known as decay rate (DECAY RATE). But before
each ALC gain increase the ALC must wait a predetermined amount of time (HOLD TIME). If the audio input signal is above the
target level, the ALC will decrease the gain of the corresponding volume control until the signal reaches the target level. The rate
at which the ALC performs attenuation is known as attack rate (ATTACK RATE). The ALC’s peak detector tracks increases in
audio input signal amplitude instantaneously, but tracks decreases in audio input signal amplitude at programmable rate (PEAK
DECAY TIME). ATTACK RATE, DECAY RATE, HOLD TIME, and PEAK DECAY TIME are fully adjustable which allows flexible
operation of the ALC circuit. The ALC’s timers are based on the sample rate of the DAC or ADC, so the closest corresponding
sample rate must be programmed into the DAC SAMPLE setting (for DAC ALC) or the ADC SAMPLE (for ADC ALC).

30128291

FIGURE 32. ALC Example

www.ti.com

96

LM49360

Содержание Boomer LM49360

Страница 1: ...LM49360 LM49360 Mono Class D Audio Codec PMU with Ground Referenced Headphone Amplifiers Earpiece Driver Audio DSP 2 Step Down DC DC Converters and 7 LDO Regulators Literature Number SNAS501A...

Страница 2: ...PLS at LS_VDD 3 6V 8 1 THD 595mW typ SNR Stereo DAC at 48kHz 97dB typ PSRR at 217 Hz A_VDD 3 6V HP from AUX 95dB typ 4 0 Features Ultra efficient spread spectrum Class D loudspeaker amplifier Low volt...

Страница 3: ...5 0 LM49360 Overview 301282h8 FIGURE 1 LM49360 Block Diagram www ti com 2 LM49360...

Страница 4: ...6 0 Typical Application 30128211 FIGURE 2 Sub PMU System Diagram 3 www ti com LM49360...

Страница 5: ...30128216 FIGURE 3 AP PMU System Diagram www ti com 4 LM49360...

Страница 6: ...1 2 t0 TCC Core Buck2 700 1 8 I2C VT CAM I O LDO1 400 1 8 t4 t0 256 TCC 1 8 I O LDO2 200 2 6 I2C MIC BIAS LDO3 400 2 8 t4 t0 256 TCC 2 8 I O LDO4 200 3 3 I2C DC MOTOR LDO5 200 3 3 t4 t0 256 USB LDO6...

Страница 7: ...O 7 21 19 0 Electrical Characteristics Audio CODEC A_VDD LS_VDD 3 6V HP_VDD D_VDD I O_VDD 1 8V 22 20 0 Timing Characteristics DVDD I OVDD 1 8V 27 21 0 Typical Performance Characteristics 29 22 0 Syste...

Страница 8: ...RE 30 ADC DSP Effects Chain 94 FIGURE 31 DAC DSP Effects Chain 94 FIGURE 32 ALC Example 96 FIGURE 33 ALC Limiter 97 FIGURE 34 Audio Compressor Effect 105 FIGURE 35 Soft Knee Example with Compression R...

Страница 9: ...VEL 0x19h 77 TABLE 48 HP_SENSE 0x1Bh 79 TABLE 49 ADC Basic 0x20h 80 TABLE 50 ADC_CLK_DIV 0x21h 80 TABLE 51 ADC_MIXER 0x23h 81 TABLE 52 DAC Basic 0x30h 82 TABLE 53 DAC_CLK_DIV 0x31h 82 TABLE 54 Input L...

Страница 10: ...Bh 117 TABLE 94 EQ_BAND_2 0xACh 118 TABLE 95 EQ_BAND_3 0xADh 119 TABLE 96 EQ_BAND_4 0xAEh 120 TABLE 97 EQ_BAND_5 0xAFh 121 TABLE 98 SOFTCLIP1 0xB0h 122 TABLE 99 SOFTCLIP2 0xB1h 123 TABLE 100 SOFTCLIP3...

Страница 11: ...30128250 Order Number LM49360RL See NS Package Number RLA64JBA 64 Bump micro SMD Marking 301282q7 Top View XY Date Code TT Die Traceability G Boomer N6 LM49360RL LM49360RL Pinout Diagram 30128251 Top...

Страница 12: ...ckage DWG Transport Media MSL Level Green Status LM49360RL 64 Bump micro SMDxt RLA64JBA 250 units on tape and reel 1 RoHS and no Sb Br LM49360RLX 64 Bump micro SMDxt RLA64JBA 1000 units on tape and re...

Страница 13: ...ly Input CONFIG Low In AP PMU mode PWR_ON low enables standby mode and PWR_ON high turns on the BUCK and LDO outputs The PWR_ON pin expects to be driven by Vbatt via an external switch CONFIG High or...

Страница 14: ...t G4 MIC Analog Input Microphone negative input G5 PORT1_SDI Digital Input Audio Port 1 serial data input G6 D_VDD Supply Input DAC Digital ADC Digital PLL Digital digital mixer DSP core and I2C regis...

Страница 15: ...the opposite order from power up The time between stages is programmable 8 s 64 s 128 s and 256 s The timing for each output can be set individually and can be different for each of the 3 modes The ou...

Страница 16: ...301282h9 FIGURE 4 PMU State Machine 15 www ti com LM49360...

Страница 17: ...w power os cillator is reused by many circuits in the device that require delays the PMC controls when it should be enabled If the PMC is not using the oscillator i e PMC_CLK_SEL is set to MCLK it wil...

Страница 18: ...lick and pop free operation The comparator is then pow ered down If no zero crossing occurs after 11ms assume audio content at frequencies above 36Hz the changes are applied regardless and the control...

Страница 19: ...nsumption Unless otherwise noted PVDD VIN1 VIN2 VIN3 VINB1 VINB2 3 6V CVINB1 CVINB2 4 7 F CVIN1 CVIN2 CVIN3 10 F A_VDD LS_VDD 3 6V HP_VDD D_VDD IO_VDD 1 8V Typical values and limits appearing in boldf...

Страница 20: ...in voltage is continuously monitored to determine if it is above the UVLO threshold If the PVDD drops below the UVLO threshold an UVLO_EVENT occurs and the PMU state machine returns to the STANDBY sta...

Страница 21: ...0 m IOUT 200mA RDSON N Pin Pin resistance for NMOS VIN VGS 3 6V 100 120 m IOUT 200mA ILIM Switch Peak Current Limit Open loop programmable 1020 1200 1360 mA tSTARTUP Start Up Time IOUT 0mA to 100mA 50...

Страница 22: ...arameter Condition Min Typ Max Units VOUT Output Voltage Accuracy IOUT 1mA VOUT 1 2V 2 2 IOUT 1mA VOUT 1 2V over temperature 3 3 IOUT Max Output Current VOUT 0 5V VIN3 5 5V 20 40 mA ISC Output Current...

Страница 23: ...0 8 mA max AISD Analog Shutdown Current Shutdown Mode 0 1 9 A max AIDD Analog Supply Current MP3 Mode fMCLK 11 2896MHz fS 44 1kHz Stereo DAC On OSRDAC 64 PLL Off Stereo HP On From A_VDD 4 6 6 mA max...

Страница 24: ...Hz Mono Input Terminated VREF 1 0 F Input Referred LS Gain 12dB 82 65 dB min VRIPPLE 200mVP P fRIPPLE 217Hz From DAC DAC gain 0dB 80 dB SNR Signal to Noise Ratio Reference VOUT 1 THD N Mono gain 0dB A...

Страница 25: ...in Matching 0 03 dB VOS Output Offset Voltage Note 13 AUX Gain 0dB From mono Input 0 25 1 mV max DAC Gain 0dB From DAC Input fMCLK 12 288MHz 0 25 1 mV max AUXILIARY OUTPUT EARPIECE AMPLIFIER THD N Tot...

Страница 26: ...DAC Signal to Noise Ratio fS 48kHz A weighted AUXOUT 96 dB VOLUME CONTROL VCRAUX Stereo Input Volume Control Range Minimum Gain 46 5 dB Maximum Gain 18 dB VCRMONO MONO Input Volume Control Range Mini...

Страница 27: ...temperatures and is dictated by TJMAX JA and the ambient temperature TA The maximum allowable power dissipation is PDMAX TJMAX TA JA or the number given in Absolute Maximum Ratings whichever is lower...

Страница 28: ...aster 20 ns I2S SLAVE TIMING I2S_CLKPER I2S_CLK Period I2S Slave 81 38 ns min tCLK_L I2S_CLK Low Time I2S Slave 37 ns min tCLK_H I2S_CLK High Time I2S Slave 37 ns min tSDO_DLY SDO Propagation Delay fr...

Страница 29: ...Symbol Parameter Conditions LM49360 Units Limit Typical Note 6 Limit Note 7 10 Bus Free Time Between a STOP and START Condition 1 3 s min CB Bus Capacitance 200 pF max www ti com 28 LM49360...

Страница 30: ...2V Blue LSVDD 5V 0 400 800 1200 1600 2000 0 10 20 30 40 50 60 70 80 90 100 EFFICIENCY OUTPUT POWER mW 301282b2 DAC Frequency Response fS 48kHz Blue OSR 64 Light Blue OSR 128 301282b3 DAC Frequency Res...

Страница 31: ...Response fS 48kHz OSR 64 From MIC MIC Gain 6dB CIN 1 F 301282b9 Stereo Audio ADC Frequency Response fS 8kHz OSR 128 From MIC MIC Gain 6dB CIN 1 F 301282c0 Mono Voice ADC Frequency Response fS 48kHz O...

Страница 32: ...IN 1 F Gray No HPF Yellow HPF Mode 000 Light Green HPF Mode 001 Green HPF Mode 010 Light Blue HPF Mode 011 Blue HPF Mode 100 301282a5 Mono Voice HPF ADC Frequency Response fS 8kHz OSR 128 From MIC MIC...

Страница 33: ...s Frequency From MONO AUX Input MONO AUX Gain 0dB LS Gain 8dB POUT 400mW RL 8 Blue LSVDD 3 6V Light Blue LSVDD 4 2V Green LSVDD 5V 301282h0 Loudspeaker THD N vs Frequency From MONO AUX Input MONO AUX...

Страница 34: ...128 MONO AUX Input MONO AUX Gain 0dB LS Gain 12dB LSVDD 4 2V VRIPPLE 200mVPP Input Referred 30128275 Loudspeaker PSRR vs Frequency MONO AUX Input MONO AUX Gain 0dB LS Gain 12dB LSVDD 5V VRIPPLE 200mV...

Страница 35: ...0dB HPVDD 2 8V POUT 15mW RL 16 Stereo in Phase 30128264 Headphone PSRR vs Frequency MONO AUX Input MONO AUX Gain 0dB HP Gain 0dB HPVDD 1 8V AVDD 3 6V VRIPPLE 200mVPP Ripple on HPVDD AVDD 30128268 Hea...

Страница 36: ...MONO AUX Gain 0dB EP Gain 6dB AVDD 3 6V VRIPPLE 200mVPP Earpiece Mode 301282e6 Auxiliary Output THD N vs Frequency MONO AUX Input MONO AUX Gain 0dB EP Gain 0dB AVDD 3 6V VOUT 1VRMS RL 5k AUXOUT Mode 3...

Страница 37: ...82g1 LDO Load Transient VIN 3 6V VOUT 2 0V 1 400mA Load COUT 10 F LDO1 LDO3 301282g2 LDO Load Transient VIN 3 6V VOUT 2 0V 1 200mA Load COUT 1 F LDO2 LDO4 LDO5 LDO6 301282g3 LDO Load Transient VIN 3 6...

Страница 38: ...et Timing VIN 3 6V 301282g6 LDO Turn On Time VIN 3 6V Config VBATT 301282g7 LDO Output Ripple VIN 3 6V Buck 1 and 2 On 301282g8 LDO Output Ripple VIN 3 6V Buck 1 and 2 Off 301282g9 37 www ti com LM493...

Страница 39: ...ault address of 00110102 independent of the status of the CONFIG pin All of the LM49360 s I2C chip addresses are selectable via I2C registers 0x40h and 0x41h in the PMU register space 22 3 I2C DATA VA...

Страница 40: ...ck acknowledge SDA pulled down by slave rs repeated start FIGURE 10 Example I2C Write Cycle When a READ function is to be accomplished a WRITE function must precede the READ function as shown in the R...

Страница 41: ...5 Data Hold Time Input direction delay generated by the Master 0 900 ns 6 Data Setup Time 100 ns 7 Rise Time of SDA and SCL 20 0 1CB 300 ns 8 Fall Time of SDA and SCL 15 0 1CB 300 ns 9 Set up Time for...

Страница 42: ...the shutdown sequence PS_HOLD needs to be held low greater than 30ms before RESET_N is asserted low The PMU then starts the shutdown sequence in the opposite order of the startup sequence Note 3 If PS...

Страница 43: ...conditions Buck startup duration is typically 40 s LDO startup duration is typically 50 s and LDO7 HILO startup duration is typically 70 s For details please see LDOs and BUCK electrical specification...

Страница 44: ...CK are enabled disabled Enabling disabling process duration depends on voltages and loading conditions Buck startup duration is typically 40 s LDO startup duration is typically 50 s and LDO7 HILO star...

Страница 45: ...re are valid if there the registers are not rewritten via I2C Note 2 The timing showed here define time points when LDOs and BUCK are enabled disabled Enabling disabling process duration depends on vo...

Страница 46: ...hen this output turn on after tS 7 Note 5 Upon initial power up the PMU registers are loaded with default values Changes to the default values will be retained until device power is removed Register v...

Страница 47: ...LDO2 0x99h LDO2_DLY LDO2_VSEL 0x16h LDO3 0x79h LDO3_DLY LDO3_VSEL 0x17h LDO4 0xACh LDO4_DLY LDO4_VSEL 0x18h LDO5 0x99h LDO5_DLY LDO5_VSEL 0x19h LDO6 0x99h LDO6_DLY LDO6_VSEL 0x1Ah LDO7 0x07h LDO7_DLY...

Страница 48: ...PD RSVD TIMESTEP UVLO_VSEL 0x3Ch PLDWN 0xFFh LDO6_PD LDO5_PD LDO4_PD LDO3_PD LDO2_PD LDO1_PD BK2PD BK1PD 0x3Dh OVR 0x00h LDO7OV R LDO6OVR LDO5OVR LDO4OVR LDO3OVR LDO2OVR LDO1OVR BK1OVR I2C DEVICE ADDR...

Страница 49: ...CLK_SEL MUTE_R MUTE_L DAC_OSR 0x31h DAC _CLOCK DAC_CLK_DIV S DIGITAL MIXER 0x40h IPLVL1 PORT2_RX_R_LVL PORT2_RX_L_LVL PORT1_RX_R_LVL PORT1_RX_L_LVL 0x41h IPLVL2 INTERP_L_LVL INTERP_R_LVL ADC_R_LVL ADC...

Страница 50: ...0x82h ADC NG_ENB NOISE_FLOOR ALC 2 0x83h ADC ALC_TARGET_LEVEL ALC 3 0x84h ADC ATTACK_RATE ALC 4 0x85h ADC PK_DECAY_RATE DECAY_RATE RELEASE_RATE ALC 5 0x86h ADC HOLDTIME ALC 6 0x87h ADC MAX_LEVEL ALC 7...

Страница 51: ...5 LEVEL FREQ 0xB0h SOFTCLIP 1 SOFT KNEE THRESHOLD 0xB1h SOFTCLIP 2 RATIO 0xB2h SOFTCLIP 3 LEVEL DAC EFFECT MONITORS 0xB8h LVLMONL DAC LEFT LEVEL MONITOR 0xB9h LVLMONR DAC RIGHT LEVEL MONITOR 0xBAh FXC...

Страница 52: ...the CONFIG pin 01 Force Bank 0 CAM 10 Force Bank 1 SUB_PMU 11 Force Bank 2 AP_PMU 7 SWOVR If SWOVR Software Override is set it allows PMU outputs to be enabled under I2C control of the SWOVR Software...

Страница 53: ...filter is bypassed Set this bit high for 1ms after changing VSEL if the output voltage needs to be adjusted while the LDO is enabled Otherwise the internal filter will slow the transition time to ove...

Страница 54: ...tage ambient temperature and the inductor chosen There are two modes of operation depending on the current required PWM Pulse Width Modulation ECO ECOnomy mode The device operates in PWM mode at load...

Страница 55: ...limit of the PMOS is exceeded Then the NMOS switch is turned on and the inductor current ramps down The next cycle is initiated by the clock turning off the NMOS and turning on the PMOS 30128232 FIGU...

Страница 56: ...5 99 Buck Output Voltage Selection The selection of the bucks output voltages can be done by writing a specific code into the control registers addr 0x12 0x22 0x32 for Buck1 addr 0x13 0x23 0x33 for Bu...

Страница 57: ...nected to the output with the recommended value of 1 F It is important that the capacitance is within the specified value across voltage and temperature PMU Enabled The PMU allows four major methods o...

Страница 58: ...7 Bank 2 CONFIG L 0x3Dh bits 0 7 The OVR register bit for Buck 2 is located in the following ENB2 registers Bank 0 CONFIG Z 0x11h bit 7 Bank 1 CONFIG H 0x21h bit 7 Bank 2 CONFIG L 0x31h bit 7 The SUB...

Страница 59: ...ET_N CONFIG H 0x2Eh PMU Thermal Shutdown TSD The PMU registers that support the TSD are listed in the table below See individual register descriptions for the details I2C Register Name I2C Register Ad...

Страница 60: ...fast discharging of output capacitors in shut down the LDO7 HILO can connect a 300 pull down resistor to the output This resistor is only connected when the LDO is disabled See Table 20 for the regist...

Страница 61: ...s Field Description 3 0 LDO7_VSEL Selects the output voltage LDO _VSEL Vout V LDO _VSEL Vout V 0000 1 55 1000 1 15 0001 1 5 1001 1 1 0010 1 45 1010 1 05 0011 1 4 1011 1 0100 1 35 1100 0 95 0101 1 3 11...

Страница 62: ...2 output will be pulled down by a 300 resistor when disabled 2 LDO1_PD If set the LDO1 output will be pulled down by a 300 resistor when disabled 3 LDO2_PD If set the LDO2 output will be pulled down b...

Страница 63: ...or TSDL 110 0 111 1 3 BK1_SUBOVR If set the Buck1 output enables when SUBOVR is set i e PS_HOLD in a subPMU mode 4 LDO1_SUBOVR If set the LDO1 output enables when SUBOVR is set i e PS_HOLD in a subPMU...

Страница 64: ...11 1111110 100 1111001 101 1111000 110 1111011 111 1111010 5 3 AUD_I2C_ADDR The I2C Address for the Audio Subsystem AUD_I2C_ADDR I2C_ADDR 000 0011010 001 0011011 010 0011000 011 0011001 100 0011110 10...

Страница 65: ...es the oscillator can be used instead of an external system clock to drive the chip s power management PMC OSC_ENABLE Oscillator Status 0 Oscillator Off 1 Oscillator On 4 MCLK_OVR This forces the MCLK...

Страница 66: ...egister is used to control the LM49360 s Power Management Circuit Clock Divider TABLE 29 PMC_SETUP 0x02h Bits Field Description 7 0 PMC_CLK_DIV This programs the half cycle divider that precedes the P...

Страница 67: ...sed the PLL input clock can come from three sources The clock input to the PLL can come from the MCLK input the PORT1_CLK input or the PORT2_CLK input The LM49360 s Power Management Circuit PMC requir...

Страница 68: ...30128213 FIGURE 20 Internal Clock Network 67 www ti com LM49360...

Страница 69: ...s dual audio ports The PLL has a P1 and P2 output divider thereby allowing the PLL to generate two distinct clock outputs The equations for the PLL s generated output clocks are as follows fOUT1 fIN N...

Страница 70: ...00 0 19 68 20 5 147 0 12 5 11289600 0 19 8 27 5 196 0 12 5 11289600 0 26 18 5 144 19 18 11289602 1 2 1 27 37 5 196 0 12 5 12289600 0 11 2896 10 5 195 0 17 5 12000000 0 12 288 8 125 0 16 12000000 0 13...

Страница 71: ...grams the PLL s M divider to divide from 1 to 64 PLL_M PLL Input Divider Value 000000 1 000001 1 000010 1 5 000011 2 000100 2 5 000101 3 1111101 63 1111110 63 5 1111111 64 TABLE 35 PLL_N 0x05h Bits Fi...

Страница 72: ...1 0x07h Bits Field Description 7 0 PLL_P1 7 0 This programs the 8 LSBs of the PLL s P1 Divider These LSBs combine with PL1_P1 8 which allows the P1 divider to divide by up to 256 PLL_P1 8 0 P1 Divider...

Страница 73: ...the speaker and associated cables and traces Where a fixed frequency class D exhibits large amounts of spectral energy at multiples of the switching frequency the spread spectrum architecture of the L...

Страница 74: ...rformance Charge Pump Flying Capacitor C38 The flying capacitor C38 affects the load regulation and output impedance of the charge pump A C38 value that is too low results in a loss of current drive l...

Страница 75: ...low current drive mode where the AUXOUT amplifier operates in a power saving mode AUX_LINE_OUT Mode to provide a differential output that is used as a mono differential line level input to a standalon...

Страница 76: ...8dB 0010 10dB 0011 12dB 0100 14dB 0101 16dB 0110 18dB 0111 20dB 1000 22dB 1001 24dB 1010 26dB 1011 28dB 1100 30dB 1101 32dB 1110 34dB 1111 36dB 4 SE_DIFF If set the MIC negative input is ignored In s...

Страница 77: ...0 37 5dB 100110 10 5dB 000111 36dB 100111 12dB 001000 34 5dB 101000 13 5dB 001001 33dB 101001 15dB 001010 31 5dB 101010 16 5dB 001011 30dB 101011 18dB 001100 28 5dB 001101 27dB 001110 25 5dB 001111 24...

Страница 78: ...36dB 100111 12dB 001000 34 5dB 101000 13 5dB 001001 33dB 101001 15dB 001010 31 5dB 101010 16 5dB 001011 30dB 101011 18dB 001100 28 5dB 001101 27dB 001110 25 5dB 001111 24dB 010000 22 5dB 010001 21dB...

Страница 79: ...each headphone amplifier output Without the presence of a headphone plug the headphone jack s mechanical switch is closed thereby connecting the right headphone amplifier output to RPU The GPIO pin d...

Страница 80: ...s bit enables the headphone sense circuit If enabled the headphone amplifier will automatically turn on off based on the logic level of the GPIO pin whenever GPIO is selected as a headphone sense inpu...

Страница 81: ...CLK_SEL Source 000 MCLK 001 PORT1_RX_CLK 010 PORT2_RX_CLK 011 PLL_OUTPUT1 100 PLL_OUTPUT2 7 ADC_DSP_ONLY If set the ADC s analog circuitry is disabled to reduce power consumption however ADC DSP funct...

Страница 82: ...channel ADC_MIX_LEVEL_L Level 00 0dB 01 1 35dB 10 3 5dB 11 6dB 3 2 ADC_MIX_LEVEL_R This sets the input level to the right ADC channel ADC_MIX_LEVEL_R Level 00 0dB 01 1 35dB 10 3 5dB 11 6dB 4 STEREO_LI...

Страница 83: ...L_OUTPUT1 100 PLL_OUTPUT2 7 DSP_ONLY If set the DAC s analog circuitry is disabled to reduce power consumption however DAC DSP functionality is maintained This can be used to perform asynchronous re s...

Страница 84: ...version SRC between audio ports This allows simultaneous operation of the dual audio ports even if each port is operating at a different sample rate The LM49360 can be used as an audio port bridge wit...

Страница 85: ...nnel of Audio Port 2 PORT2_RX_L_LVL Level 00 0dB 01 6dB 10 12dB 11 18dB 7 6 PORT2_RX_R _LVL This programs the input level of the data arriving from the right receive channel of Audio Port 2 PORT2_RX_R...

Страница 86: ...R 10 PORT2_RX_R 11 DAC_INTERP_R 4 SWAP If set this swaps the Left and Right outputs to Audio Port 1 5 MONO If set the right channel is ignored and the left channel becomes left right 2 TABLE 57 Audio...

Страница 87: ...and Right inputs to the DAC TABLE 59 Decimator Input Select 0x45h Bits Field Description 1 0 L_SEL This selects which input is fed to the left ADC s decimator input L_SEL Selected Input 00 None 01 POR...

Страница 88: ...URE 24 I2S Serial Data Format 24 bit example 30128272 FIGURE 25 Left Justified Data Format 24 bit example 30128270 FIGURE 26 Right Justified Data Format 24 bit example 30128234 FIGURE 27 PCM Serial Da...

Страница 89: ...301282i1 FIGURE 28 Timing for I2S Master 301282i2 FIGURE 29 Timing for I2S Slave www ti com 88 LM49360...

Страница 90: ...X on rising edge RX on falling edge 6 STEREO_SYNC_PHASE If set this reverses the left and right channel data of the Audio Port STEREO_SYNC_PHASE Audio Port Data Orientation 0 Left channel data goes to...

Страница 91: ...M Along with SYNTH_NUM this sets the clock divider that generates the Port 1 or Port 2 clock in master mode SYNTH_DENOM Denominator 0 128 1 125 TABLE 63 CLK_GEN_1 0x53h 63h Bits Field Description 2 0...

Страница 92: ...tion 2 0 RX_WIDTH This programs the expected bits per word of the serial data input SDI RX_WIDTH Bits 000 24 001 20 010 18 011 16 100 14 101 13 110 12 111 8 5 3 TX_WIDTH This programs the bits per wor...

Страница 93: ...LSB Justified MSB_POSITION Description 00000 0 Left Justified PCM Long 00001 1 I2S PCM Short 00010 2 00011 3 00100 4 00101 5 00110 6 00111 7 01000 8 01001 9 01010 10 01011 11 01100 12 01101 13 01110...

Страница 94: ...SB Justified MSB_POSITION Description 00000 0 Left Justified PCM Long 00001 1 I2S PCM Short 00010 2 00011 3 00100 4 00101 5 00110 6 00111 7 01000 8 01001 9 01010 10 01011 11 01100 12 01101 13 01110 14...

Страница 95: ...ALC digital soft clip compression and a 5 band parametric EQ The ADC DSP features digital volume control automatic level control ALC and digital soft clip compression The effects chain of each DSP en...

Страница 96: ...iption 0 DAC_ALC_ENB This enables the DAC s Automatic Level Control 1 DAC_PK_ENB This enables the DAC s Peak Detector 2 DAC_EQ_ENB This enables the DAC s 5 band Parametric EQ 3 RSVD Reserved 4 ADC_SCL...

Страница 97: ...idered as noise and will be gated from the ALC s peak detector in order to avoid noise pumping So it is important to set NOISE_FLOOR to correlate with the signal to noise ratio of the corresponding au...

Страница 98: ...lifier or ADC in order to prevent harsh distortions delivered to the loudspeaker or headphone on the receiving end This method of ALC limiter operation is also known as no clip mode Operating the ALC...

Страница 99: ...stereo imaging If this bit is cleared then both channels operate as dual mono 5 SOURCE_RSEL If both SOURCE_OVR and this bit is set the right ADC ALC channel will be active 6 SOURCE_LSEL If both SOURC...

Страница 100: ...l be attenuated TARGET_LEVEL Target Level dB 00000 1 5 00001 3 00010 4 5 00011 6 00100 7 5 00101 9 00110 10 5 00111 12 01000 13 5 01001 15 01010 16 5 01011 18 01100 19 5 01101 21 01110 22 5 01111 24 1...

Страница 101: ...eps s 00000 21 00001 42 00010 83 00011 167 00100 250 00101 333 00110 417 00111 542 01000 729 01001 958 01010 1250 Default 01011 1604 01100 1896 01101 2208 01110 2792 01111 3708 10000 4792 10001 5688 1...

Страница 102: ...8 01000 896 01001 1250 01010 1396 Default 01011 2000 01100 2708 01101 3500 01110 4750 01111 6250 10000 8000 10001 11000 10010 14000 10011 18500 10100 25000 10101 32000 10110 42000 10111 55000 11000 72...

Страница 103: ...500 11100 640 11101 800 11110 1000 11111 1250 TABLE 76 ADC_ALC_7 0x87h Bits Field Description 5 0 MAX_LEVEL This sets the maximum allowed gain of the volume control to the output amplifier whenever th...

Страница 104: ...101010 13 5dB 001011 60dB 101011 12dB 001100 58 5dB 101100 10 5dB 001101 57dB 101101 9dB 001110 55 5dB 101110 7 5dB 001111 54dB 101111 6dB 010000 52 5dB 110000 4 5dB 010001 51dB 110001 3dB 010010 49 5...

Страница 105: ...1 63dB 101001 15dB 001010 61 5dB 101010 13 5dB 001011 60dB 101011 12dB 001100 58 5dB 101100 10 5dB 001101 57dB 101101 9dB 001110 55 5dB 101110 7 5dB 001111 54dB 101111 6dB 010000 52 5dB 110000 4 5dB 0...

Страница 106: ...ressor threshold level THRESHOLD by a fixed ratio com pressor output compressor input that is set by a predetermined audio compression ratio RATIO Higher compression ratios result in more compression...

Страница 107: ...udio signal beyond the compressor threshold To achieve the smoothing effect to prevent hard clipping the soft knee function initially compresses the audio signal at the smallest ratio and then increme...

Страница 108: ...B 0111 15dB 1000 14dB 1001 12dB 1010 10dB 1011 8dB 1100 6dB 1101 4dB 1110 2 5dB 1111 1dB 4 SOFT_KNEE If set the audio compressor will automatically apply higher compression ratios to audio signals hig...

Страница 109: ...00 1 1 Bypass 00001 1 1 2 00010 1 1 4 00011 1 1 7 00100 1 2 0 00101 1 2 4 00110 1 2 8 00111 1 3 4 01000 1 4 0 01001 1 4 7 01010 1 5 7 01011 1 6 7 01100 1 8 0 01101 1 9 5 01110 1 11 3 01111 1 13 5 1000...

Страница 110: ...11 18dB 00100 16 5dB 00101 15dB 00110 13 5dB 00111 12dB 01000 10 5dB 01001 9dB 01010 7 5dB 01011 6dB 01100 4 5dB 01101 3dB 01110 1 5dB 01111 0dB 10000 1 5dB 10001 3dB 10010 4 5dB 10011 6dB 10100 7 5dB...

Страница 111: ...um gain that the ALC will apply Care should be taken when choosing the optimum I2C gain setting whenever enabling the Limiter 4 STEREO LINK If set the ALC circuit uses the stereo average of the input...

Страница 112: ...attenuated TARGET_LEVEL Target Level dB 00000 1 5 00001 3 00010 4 5 00011 6 00100 7 5 00101 9 00110 10 5 00111 12 01000 13 5 01001 15 01010 16 5 01011 18 01100 19 5 01101 21 01110 22 5 01111 24 10000...

Страница 113: ...teps us 00000 21 00001 42 00010 83 00011 167 00100 250 00101 333 00110 417 00111 542 01000 729 01001 958 01010 1250 Default 01011 1604 01100 1896 01101 2208 01110 2792 01111 3708 10000 4792 10001 5688...

Страница 114: ...10001 11000 10010 14000 10011 18500 10100 25000 10101 32000 10110 42000 10111 55000 11000 72500 11001 100000 11010 125000 11011 160000 11100 225000 11101 300000 11110 375000 11111 500000 0 5s 7 5 PK_D...

Страница 115: ...0 25 01111 32 10000 40 10001 50 10010 64 10011 80 10100 100 10101 125 10110 160 10111 200 11000 250 11001 320 11010 400 11011 500 11100 640 11101 800 11110 1000 11111 1250 TABLE 89 DAC_ALC_7 0xA6h Bit...

Страница 116: ...5dB 001011 60dB 101011 12dB 001100 58 5dB 101100 10 5dB 001101 57dB 101101 9dB 001110 55 5dB 101110 7 5dB 001111 54dB 101111 6dB 010000 52 5dB 110000 4 5dB 010001 51dB 110001 3dB 010010 49 5dB 110010...

Страница 117: ...01 15dB 001010 61 5dB 101010 13 5dB 001011 60dB 101011 12dB 001100 58 5dB 101100 10 5dB 001101 57dB 101101 9dB 001110 55 5dB 101110 7 5dB 001111 54dB 101111 6dB 010000 52 5dB 110000 4 5dB 010001 51dB...

Страница 118: ...gain at fC LEVEL Effect 00000 Off 0dB 00001 15dB 00010 14dB 00011 13dB 00100 12dB 00101 11dB 00110 10dB 00111 9dB 01000 8dB 01001 7dB 01010 6dB 01011 5dB 01100 4dB 01101 3dB 01110 2dB 01111 1dB 10000...

Страница 119: ...5dB 00010 14dB 00011 13dB 00100 12dB 00101 11dB 00110 10dB 00111 9dB 01000 8dB 01001 7dB 01010 6dB 01011 5dB 01100 4dB 01101 3dB 01110 2dB 01111 1dB 10000 0dB 10001 1dB 10010 2dB 10011 3dB 10100 4dB 1...

Страница 120: ...dB 00010 14dB 00011 13dB 00100 12dB 00101 11dB 00110 10dB 00111 9dB 01000 8dB 01001 7dB 01010 6dB 01011 5dB 01100 4dB 01101 3dB 01110 2dB 01111 1dB 10000 0dB 10001 1dB 10010 2dB 10011 3dB 10100 4dB 10...

Страница 121: ...15dB 00010 14dB 00011 13dB 00100 12dB 00101 11dB 00110 10dB 00111 9dB 01000 8dB 01001 7dB 01010 6dB 01011 5dB 01100 4dB 01101 3dB 01110 2dB 01111 1dB 10000 0dB 10001 1dB 10010 2dB 10011 3dB 10100 4dB...

Страница 122: ...gain at fC LEVEL Effect 00000 Off 0dB 00001 15dB 00010 14dB 00011 13dB 00100 12dB 00101 11dB 00110 10dB 00111 9dB 01000 8dB 01001 7dB 01010 6dB 01011 5dB 01100 4dB 01101 3dB 01110 2dB 01111 1dB 10000...

Страница 123: ...B 0111 15dB 1000 14dB 1001 12dB 1010 10dB 1011 8dB 1100 6dB 1101 4dB 1110 2 5dB 1111 1dB 4 SOFT_KNEE If set the audio compressor will automatically apply higher compression ratios to audio signals hig...

Страница 124: ...000 1 1 Bypass 00001 1 1 2 00010 1 1 4 00011 1 1 7 00100 1 2 0 00101 1 2 4 00110 1 2 8 00111 1 3 4 01000 1 4 0 01001 1 4 7 01010 1 5 7 01011 1 6 7 01100 1 8 0 01101 1 9 5 01110 1 11 3 01111 1 13 5 100...

Страница 125: ...011 18dB 00100 16 5dB 00101 15dB 00110 13 5dB 00111 12dB 01000 10 5dB 01001 9dB 01010 7 5dB 01011 6dB 01100 4 5dB 01101 3dB 01110 1 5dB 01111 0dB 10000 1 5dB 10001 3dB 10010 4 5dB 10011 6dB 10100 7 5d...

Страница 126: ...E out 010001 EP ENABLE out 010010 EP ENABLE out 010011 ADC CLIPPED out 010100 ADC CLIPPED out 010101 DAC CLIPPED out 010110 DAC CLIPPED out 010111 SOMETHING CLIPPED out 011000 SOMETHING CLIPPED out 01...

Страница 127: ...SET Setting this bit resets the digital core of LM49360 SOFT_RESET does not affect the current I2C register settings TABLE 104 Spread Spectrum 0xF1h Bits Field Description 1 0 RSVD Reserved 2 SS_DISAB...

Страница 128: ...40 0 Schematic Diagram 30128220 FIGURE 36 Demo Board Schematic 127 www ti com LM49360...

Страница 129: ...30128245 FIGURE 37 Demo Board Schematic www ti com 128 LM49360...

Страница 130: ...41 0 Demonstration Board Layout 30128243 FIGURE 38 Top Silkscreen 30128244 FIGURE 39 Top Layer 129 www ti com LM49360...

Страница 131: ...30128238 FIGURE 40 Inner Layer 2 30128239 FIGURE 41 Inner Layer 3 www ti com 130 LM49360...

Страница 132: ...30128240 FIGURE 42 Inner Layer 4 30128241 FIGURE 43 Inner Layer 5 131 www ti com LM49360...

Страница 133: ...30128231 FIGURE 44 Bottom Layer 30128242 FIGURE 45 Bottom Silkscreen www ti com 132 LM49360...

Страница 134: ...42 0 Revision History Rev Date Description 1 0 11 14 11 Initial WEB released 1 01 12 01 11 Changed the Vdo Max limit in the EC LDOs 1 to 6 table from 200 to 250 133 www ti com LM49360...

Страница 135: ...3 0 Physical Dimensions inches millimeters unless otherwise noted micro SMD 64 Package Order Number LM49360RL NS Package Number RLA64JBA X1 4 169 03mm X2 3 99 03mm X3 0 65 075mm www ti com 134 LM49360...

Страница 136: ...Notes 135 www ti com LM49360...

Страница 137: ...or use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have...

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