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SIM800H_Hardware Design_V2.03

SIMCOM

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Summary of Contents for SIMCom SIM800H

Page 1: ...SIM800H_Hardware Design_V2 03 S I M C O M C O N F I D E N T I A L F I L E...

Page 2: ...ssion Furthermore system validation of this product designed by SIMCom within a larger electronic system remains the responsibility of the customer or the customer s system integrator All specificatio...

Page 3: ...pply Pin 21 4 1 2 Monitoring Power Supply 22 4 2 Power on off Scenarios 22 4 2 1 Power on SIM800H 22 4 2 2 Power down SIM800H 23 4 2 3 Reset Function 24 4 3 Power Saving Mode 25 4 3 1 Minimum Function...

Page 4: ...a Interface 47 4 19 1 GSM Antenna Interface 47 4 19 2 Bluetooth Antenna Interface 48 4 19 3 FM Antenna Interface 49 5 PCB Layout 50 5 1 Pin Assignment 50 5 2 Principle of PCB Layout 51 5 2 1 Antenna I...

Page 5: ...encies 59 7 Manufacturing 60 7 1 Top and Bottom View of SIM800H 60 7 2 Typical Solder Reflow Profile 60 7 3 The Moisture Sensitivity Level 61 7 4 Baking Requirements 61 8 Appendix 62 I Related Documen...

Page 6: ...OL SIM CARD HOLDER 39 TABLE 20 PCM PIN DEFINITION 39 TABLE 21 PCM SPECIFICATION 40 TABLE 22 PIN DEFINITION OF THE KEYPAD INTERFACE 42 TABLE 23 PIN DEFINITION OF THE I2C 43 TABLE 24 PIN DEFINITION OF T...

Page 7: ...OUTPUT POWER 58 TABLE 48 DCS1800 AND PCS1900 CONDUCTED RF OUTPUT POWER 59 TABLE 49 CONDUCTED RF RECEIVE SENSITIVITY 59 TABLE 50 OPERATING FREQUENCIES 59 TABLE 51 MOISTURE SENSITIVITY LEVEL AND FLOOR...

Page 8: ...ERFACES 29 FIGURE 21 RESISTOR MATCHING CIRCUIT 30 FIGURE 22 DIODE ISOLATION CIRCUIT 30 FIGURE 23 TX LEVEL MATCHING CIRCUIT 30 FIGURE 24 RX LEVEL MATCHING CIRCUIT 31 FIGURE 25 USB REFERENCE CIRCUIT 31...

Page 9: ...MATCHING CIRCUIT 48 FIGURE 49 FM ANTENNA MATCHING CIRCUIT 49 FIGURE 50 GND PIN OF THE EARPHONE USE TO BE THE FM ANTENNA INTERFACE 49 FIGURE 51 PIN ASSIGNMENT 50 FIGURE 52 RECOMMENDED PCB LAYOUT 52 FIG...

Page 10: ...sign Add notes of the KEYPAD design Add 4 2 2 5 Restart SIM800H L by PWRKEY Pin Add 4 3 4 and 4 3 5 sleep mode 2 AT CSCLK 2 Add 4 18 1 RF_SYNC Multiplexing Function Modify max value of the VBUS in tab...

Page 11: ...uch as smart phone PDA and other mobile devices SIM800H is a LGA package with 88 pads and provides all hardware interfaces between the module and customers boards Support 5 5 2 keypads One full modem...

Page 12: ...ort Packet Broadcast Control Channel PBCCH USSD Unstructured Supplementary Services Data USSD support SMS MT MO CB Text and PDU mode SMS storage SIM card SIM interface Support SIM card 1 8V 3V Externa...

Page 13: ...rs is in progress In this case the power consumption depends on network settings such as DTX off on FR EFR HR hopping sequences antenna GPRS STANDBY Module is ready for GPRS data transfer but no data...

Page 14: ...tional diagram of SIM800H GSM baseband GSM RF Antenna interface Other interface Analog base band Digital base band Power management unit Radio Frequency Power Supply Analog Interface Digital Interface...

Page 15: ...M_ VDD SIM_ RST SPK 1N SPK 2N SPK2P BT_ ANT SIM_ CLK SIM_ DET SIM_ DATA VDD_ EXT GND 86 GND 85 GND 84 GND GND 87 GND 88 GND 83 GND GND 80 GND 81 GND 82 GND 1 2 3 4 5 6 7 8 9 10 FM_ ANTN FM_ ANTP USB_...

Page 16: ...WRKEY should be pulled low at least 1 second and then released to power on down the module Internally pulled up to VBAT Audio interfaces MIC1P 52 I Differential audio input If these pins are unused ke...

Page 17: ...I O ADC ADC 50 I 10bit general analog to digital converter If these pins are unused keep open PWM PWM 26 O Pulse width modulation If these pins are unused keep open I2C SDA 75 I O Open drain output If...

Page 18: ...al antenna for FM Synchronizing signal of RF RF_SYNC 5 O Synchronizing signal of RF Other RESET 49 I Reset input Active low ISINK1 46 I Drive keypad backlight ISINK0 47 I Drive LCD backlight 3 3 Packa...

Page 19: ...Smart Machine Smart Decision SIM800H _Hardware Design_V2 03 19 2016 10 10 Figure 4 Recommended PCB footprint outline Unit mm S I M C O M C O N F I D E N T I A L F I L E...

Page 20: ...g by the voltage surge These capacitors and Zener diode should be placed as close as possible to SIM800H VBAT pins VBAT 5 1V 500mW CA CB 33pF 10pF Figure 5 Reference circuit of the VBAT input Table 6...

Page 21: ...wing figure shows the VBAT voltage drop at the maximum power transmit phase and the test condition is as following VBAT 4 0V A VBAT bypass capacitor CA 100 F tantalum capacitor ESR 0 7 Another VBAT by...

Page 22: ...M800H Customer can power on SIM800H by pulling down the PWRKEY pin for at least 1 second and release This pin is already pulled up to VBAT in the module internal so external pull up is not necessary R...

Page 23: ...details please refer to the chapter AT IPR in document 1 4 2 2 Power down SIM800H SIM800H will be powered down in the following situations Normal power down procedure power down SIM800H by the PWRKEY...

Page 24: ...le software monitors the VBAT voltage constantly If the voltage 3 5V the following URC will be reported UNDER VOLTAGE WARNNING If the voltage 4 3V the following URC will be reported OVER VOLTAGE WARNN...

Page 25: ...mance but the value should not be too big otherwise the level of RESET could be lower than threshold value RESET hardware parameters can refer to the table below Table 7 Electronic characteristic of t...

Page 26: ...can control SIM800H module to enter or exit the sleep mode AT CSCLK 1 by DTR signal When DTR is in high level and without interrupt on air and hardware such as GPIO interrupt or data in serial port S...

Page 27: ...em Current output for backup battery when the VBAT power supply is in present and the backup battery is in low voltage state The RTC power supply of module can be provided by an external capacitor or...

Page 28: ...0 7 V VIH 2 1 3 1 V VOL 0 4 V VOH 2 4 2 8 V SIM800H module can support dual serial port function that need execute AT command AT CMNRP 1 first Dual serial port including one full modem serial port an...

Page 29: ...ore information please refer to AT command AT IPR Restrictions of autobauding operation The DTE serial port must be set at 8 data bits no parity and 1 stop bit The URC such as RDY CFUN 1 and CPIN READ...

Page 30: ...V or3 3V the following reference circuits are recommended TXD RXD Module DTE TXD RXD VDD_EXT 10K 10K GND GND Figure 22 Diode isolation circuit Note please make sure the minimum of client high limit sh...

Page 31: ...ftware debug function through USB interface When powering on the module connect VBUS USB_DP USB_DN and GND to PC then install the driver following the prompts a UART port could be recognized by PC cus...

Page 32: ...r debugging and upgrading software TXD Module DCE RXD GND PWRKEY TXD RXD GND Serial Port PWRKEY I O Connector Figure 26 Connection for software upgrading and debugging The UART interface supports the...

Page 33: ...re 29 RI behaviour as a caller 4 7 Audio Interfaces SIM800H provides two analog inputs MIC1P 1N MIC2P 2N which could be used for electret microphone The module also provides two analog outputs SPK1P 1...

Page 34: ...just the input gain level of microphone AT command AT SIDET is used to set the side tone level In addition AT command AT CLVL is used to adjust the output gain level For more details please refer to d...

Page 35: ...t characteristics Parameter Conditions Min Typ Max Unit Normal output RL 32 receiver 90 mW RL 8 speaker 1080 mW 4 7 4 TDD Audio signal could be interferenced by RF signal Coupling noise could be filte...

Page 36: ...ut SIM_CLK 55 SIM clock SIM_RST 15 SIM reset SIM_DET 54 SIM card detection It is recommended to use an ESD protection component such as ST www st com ESDA6V1 5W6 or ON SEMI www onsemi com SMF05C That...

Page 37: ...aces should keep away from RF lines VBAT and high speed signal lines The traces should be as short as possible Keep SIM card holder s GND connect to main ground directly Shielding the SIM card signal...

Page 38: ...M card power supply C2 SIM_RST SIM card reset C3 SIM_CLK SIM card clock C4 GND Connect to GND C5 GND Connect to GND C6 VPP Not connect C7 SIM_DATA SIM card data I O C8 SIM_DET Detect SIM card presence...

Page 39: ...supply C2 SIM_RST SIM card reset C3 SIM_CLK SIM card clock C5 GND Connect to GND C6 VPP Not connect C7 SIM_DATA SIM card data I O Note Every time plug SIM card interval advice is greater than 2s Othe...

Page 40: ...ng figure for PCM design Module CODEC PCMIN PCMSYNC PCMOUT PCMCLK GND GND PCM_IN PCM_OUT PCM_SYNC PCM_CLK Figure 36 PCM reference circuit PCM_OUT 30 PCM data output PCM_SYNC 65 PCM synchrony PCM_IN 66...

Page 41: ...KBC3 KBC4 Module Figure 37 25 keys reference circuit Note According to the traditional 5 5 to design buttons when there is spare KBC or KBR customer can execute AT command to define as GPIO for detail...

Page 42: ...ons pressed at the same time can t be detected as shown below KBRx KBCx 20K Module Figure 40 Keypad detected Table 22 Pin definition of the keypad interface Pin name Pin number Function Default state...

Page 43: ...IMCom for more details 2 If customers design I2C please pull up to VDD_EXT 4 12 General Purpose Input Output GPIO SIM800H provides 3 GPIO pins The output voltage level of the GPIO can be set by AT com...

Page 44: ...nition of the PWM SIM800H provides a PWM which can be used to drive a vibrator and a backlight LED for display or keyboard PWM output frequency varies from 0 2kHz Two 7 bit unsigned binary parameters...

Page 45: ...30 Status of the NETLIGHT pin Status SIM800H behavior Off SIM800H is not running 64ms On 800ms Off SIM800H not registered the network 64ms On 3000ms Off SIM800H registered to the network 64ms On 300m...

Page 46: ...Module ISINK0 VBAT VBAT R ISINK1 Figure 44 LED driver reference circuit Table 33 ISINK specification Pin name Min Typ Max Unit ISINK0 24 mA ISINK1 60 100 mA Note Isink0 provide 6 current level steps...

Page 47: ...han 2 It is recommended that the GSM antenna and the BT antenna should be placed as far as possible The isolations of the three antenna should be bigger than 30dB NOTE About the RF trace layout please...

Page 48: ...ot mounted D101 in Figure 46 and Figure 47 is used for ESD to protect antenna In order to avoid damaging the module TVS can be used The TVS suggested can refer to Table 35 Table 35 Recommended transie...

Page 49: ...sturbing source 4 19 3 FM Antenna Interface The module provides 2 FM antenna pad named FM_ANTP and FM_ANTN these are difference signal The FM antenna interface circuit is recommended as following Moud...

Page 50: ...will give some guidelines on PCB layout in order to eliminate interfere or noise by greatest degree and save product development period 5 1 Pin Assignment Before PCB layout we should learn well about...

Page 51: ...nd shortest layout to GND of power source should be designed There are 12 GND pads in middle of module these pads could enhance the GND performances On the upper layer of these pads do not trace any s...

Page 52: ...M800H _Hardware Design_V2 03 52 2016 10 10 5 3 Recommended PCB Layout Based on above principles recommended layout is shown in the following illustration Figure 52 Recommended PCB layout S I M C O M C...

Page 53: ...such as keypad GPIO I2C UART and PCM 6 2 Recommended Operating Conditions Table 37 Recommended operating conditions Symbol Parameter Min Typ Max Unit VBAT Power supply voltage 3 4 4 0 4 4 V VBUS USB...

Page 54: ...utput voltage 0 36 V 0 4 V 6 5 SIM_VDD Characteristics Table 40 SIM_VDD characteristics Symbol Parameter Min Typ Max Unit VO Output voltage 3 0 V 1 8 IO Output current 10 mA 6 6 VDD_EXT Characteristic...

Page 55: ...1 EGSM900 17 38 mA Voice call PCL 5 GSM850 EGSM900 DCS1800 PCS1900 221 11 238 44 157 48 159 22 mA mA mA mA Data mode 1Rx 4Tx GSM850 EGSM900 DCS1800 PCS1900 491 79 529 84 333 16 336 28 mA mA mA mA Dat...

Page 56: ...2 Modulation f2max 115 130 kHz 6 3 Modulation f2avg f1avg 0 8 0 88 7 Carrier Frequency Drift 7 1 1slot 25 25 kHz 7 2 3slot 40 40 kHz 7 3 5slot 40 40 kHz 7 4 Maximum drift rate 20 20 kHz 50us 8 Out of...

Page 57: ...2 C I Performance BER 0 1 12 1 co channel ratio 60dBm input 8 11 dB 12 2 1MHz ratio 60dBm input 10 0 dB 12 3 2MHz ratio 60dBm input 38 30 dB 12 4 3MHz ratio 67dBm input 45 40 dB 12 5 image 1MHz ratio...

Page 58: ...TXD 2KV 8KV Antenna port 5KV 10KV SPK_P SPK_N MIC_P MIC_N 2KV 5KV PWRKEY 2KV 8KV 6 10 Radio Characteristics 6 10 1 Module RF Output Power The following table shows the module conducted output power it...

Page 59: ...e s conducted receiving sensitivity it is tested under static condition Table 49 Conducted RF receive sensitivity Frequency Receive sensitivity Typical Receive sensitivity Max GSM850 EGSM900 108dBm 10...

Page 60: ..._V2 03 60 2016 10 10 7 Manufacturing 7 1 Top and Bottom View of SIM800H Figure 53 Top and bottom view of SIM800H 7 2 Typical Solder Reflow Profile Figure 54 Typical solder reflow profile of lead free...

Page 61: ...ts SIM800H modules are vacuum packaged and guaranteed for 6 months storage without opening or leakage under the following conditions the environment temperature is lower than 40 and t he ai rh If the...

Page 62: ...erface for Short Message Service SMS and Cell Broadcast Service CBS 7 GSM 11 14 Digital cellular telecommunications system Phase 2 Specification of the SIM Application Toolkit for the Subscriber Ident...

Page 63: ...unications HR Half Rate IMEI International Mobile Equipment Identity Li ion Lithium Ion MO Mobile Originated MS Mobile Station GSM engine also referred to as TE MT Mobile Terminated PAP Password Authe...

Page 64: ...abbreviations FD SIM fix dialing phonebook LD SIM last dialing phonebook list of numbers most recently dialed MC Mobile Equipment list of unanswered MT calls missed calls ON SIM or ME own numbers MSI...

Page 65: ...r cellular terminal or mobile receives and transmits radio frequency energy while switched on RF interference can occur if it is used close to TV sets radios computers or other electric equipment Road...

Page 66: ...Contact us Shanghai SIMCom Wireless Solutions Co Ltd Address Building A SIM Technology Building No 633 Jinzhong Road Shanghai P R China 200335 Tel 86 21 32523300 Fax 86 21 32523020 Email simcom sim c...

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