SimCom SIM800H Hardware Design Manual Download Page 1

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SIM800H_Hardware_Design_V1.01

Summary of Contents for SIM800H

Page 1: ...SIM800H_Hardware_Design_V1 01...

Page 2: ...e customer s possession 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 integrato...

Page 3: ...ower down SIM800H 24 4 2 3 Reset Function 26 4 3 Power Saving Mode 27 4 3 1 Minimum Functionality Mode 27 4 3 2 Sleep Mode AT CSCLK 1 28 4 3 3 Wake Up SIM800H from Sleep Mode AT CSCLK 1 28 4 4 RTC Bac...

Page 4: ...4 17 LED Interface 51 4 18 RF Synchronization Signal 51 4 19 Antenna Interface 52 4 19 1 GSM Antenna Interface 52 4 19 2 Bluetooth antenna interface 53 4 19 3 FM Antenna Interface 54 5 PCB Layout 55...

Page 5: ...12 Module Operating Frequencies 62 7 Manufacturing 63 7 1 Top and Bottom View of SIM800H 63 7 2 Typical Solder Reflow Profile 63 7 3 The Moisture Sensitivity Level 63 7 4 Baking Requirements 64 8 App...

Page 6: ...e 19 Pin description Amphenol SIM card holder 42 Table 20 PCM Pin definition 42 Table 21 PCM specification 43 Table 22 PCM multiplexing function 43 Table 23 Pin definition of the keypad interface 47 T...

Page 7: ...Humidity 45 61 Table 50 GSM850 and EGSM900 conducted RF output power 61 Table 51 DCS1800 and PCS1900 conducted RF output power 62 Table 52 Conducted RF receive sensitivity 62 Table 53 Operating freque...

Page 8: ...20 Resistor matching circuit 31 Figure 21 Diode isolation circuit 32 Figure 22 TX level matching circuit 32 Figure 23 RX level matching circuit 32 Figure 24 USB reference circuit 33 Figure 25 Connect...

Page 9: ...tenna matching circuit 53 Figure 49 Bluetooth antenna matching circuit 54 Figure 50 FM antenna matching circuit 54 Figure 51 GND pin of the earphone use to be the FM antenna interface 54 Figure 52 Pin...

Page 10: ...ion Description of change Author 2013 08 01 1 00 Origin Jialin song Ya li 2013 08 20 1 01 Update figure 15 figure 23 figure 32 figure 54 Update Bluetooth matching R201 is 1 2nH C202 is 1 5pF Update 7...

Page 11: ...ween the module and customers boards z Support 5 5 2 keypads z One full modem serial port user can configure two serial ports z One USB the USB interfaces can debug download software z Audio channel w...

Page 12: ...Rate ETS 06 20 z Full Rate ETS 06 10 z Enhanced Full Rate ETS 06 50 06 60 06 80 z Adaptive multi rate AMR z Echo Cancellation z Noise Suppression Serial port and debug port Serial port z Full modem i...

Page 13: ...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 is currently sent or received In this case power consumption...

Page 14: ...on 2 3 Functional Diagram The following figure shows a functional diagram of SIM800H z GSM baseband z GSM RF z Antenna interface z Other interface Figure 1 SIM800H functional diagram SIM800H_Hardware_...

Page 15: ...Smart Machine Smart Decision 3 Package Information 3 1 Pin out Diagram Figure 2 SIM800H pin out diagram Top view SIM800H_Hardware_Design_V1 01 15 2013 08 20...

Page 16: ...n Power on down PWRKEY 48 I PWRKEY 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 MIC1N 12 I Differential a...

Page 17: ...download If these pins are unused keep open 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...

Page 18: ...ision SIM800H_Hardware_Design_V1 01 18 2013 08 20 Synchronizing signal of RF BPI_BUS1 5 O Synchronizing signal of RF Other RESET 49 I Reset input Active low ISINK1 46 I Drive keypad backlight ISINK0 4...

Page 19: ...Smart Machine Smart Decision 3 3 Package Dimensions Figure 3 Dimensions of SIM800H Unit mm SIM800H_Hardware_Design_V1 01 19 2013 08 20...

Page 20: ...Smart Machine Smart Decision SIM800H_Hardware_Design_V1 01 20 2013 08 20 Figure 4 Recommended PCB footprint outline Unit mm...

Page 21: ...ommended the diode can prevent chip from damaging by the voltage surge These capacitors and Zener diode should be placed as close as possible to SIM800H VBAT pins Figure 5 Reference circuit of the VBA...

Page 22: ...he test condition is as following VBAT 4 0V A VBAT bypass capacitor CA 100 F tantalum capacitor ESR 0 7 Another VBAT bypass capacitor CB 1 F Figure 8 VBAT voltage drop during transmit burst 4 1 1 Powe...

Page 23: ...1 Power on SIM800H User 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 ne...

Page 24: ...d on For 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 z Normal power down procedure power down SIM800H by...

Page 25: ...send URC NORMAL POWER DOWN At this moment AT commands can not be executed any more and only the RTC is still active Power down mode can also be indicated by STATUS pin which is at low level at this t...

Page 26: ...command AT CMTE could be used to read the temperature when the module is running For details please refer to document 1 4 2 3 Reset Function SIM800H also has a RESET pin pin 49 used to reset the modul...

Page 27: ...CFUN fun can be used to set SIM800H into minimum functionality When SIM800H is in sleep mode and minimum functionality mode the current of module is lowest 4 3 1 Minimum Functionality Mode There are...

Page 28: ...le Note Autobauding is default It cannot enter sleep mode in the absence of synchronous serial port baud rate after module power on 4 3 3 Wake Up SIM800H from Sleep Mode AT CSCLK 1 When SIM800H is in...

Page 29: ...and client DTE Table 8 Serial port and USB pin definition Pin name Pin number Function UART_DTR 69 Data terminal ready UART_RI 68 Ring indicator UART_DCD 70 Data carrier detect CTS 34 Request to send...

Page 30: ...utobauding allows SIM800H to automatically detect the baud rate of the host device Pay more attention to the following requirements z Synchronization between DTE and DCE When DCE powers on with autoba...

Page 31: ...tion of the serial interfaces If the voltage of UART is 3 3V the following reference circuits are recommended If the voltage is 3 0V please change the resistors in the following figure from 5 6K to 14...

Page 32: ...following reference circuits are recommended Figure 22 TX level matching circuit Figure 23 RX level matching circuit Note When Fig 22 and Fig 23are used for electrical level isolation if customers use...

Page 33: ...mer could upgrade module s firmware through USB or UART interface If upgrading through USB port it is necessary to power on SIM800H first then connect VBUS USB_DP USB_DM and GND to PC There is no need...

Page 34: ...plexing function of serial port If full modem is not necessary it could be multiplexed into two serial ports without flow control the details could be found in the following table Table 11 Multiplexin...

Page 35: ...ang up the call SMS The pin is changed to low and kept low for 120ms when a SMS is received Then it is changed to high URC The pin is changed to low and kept low for 120ms when some URCs are reported...

Page 36: ...PK1P 53 Main Audio output positive Main SPK1N 13 Main Audio output negative MIC2P 9 Secondary Audio input positive MIC2N 10 Secondary Audio input negative SPK2P 51 Secondary Audio output positive Seco...

Page 37: ...differential signal layout rules as shown in following figures 4 7 1 Speaker Interfaces Configuration Figure 30 Speaker reference circuit 4 7 2 Microphone Interfaces Configuration 10pF 33pF 33pF 33pF...

Page 38: ...ent story is from DCS1800 PCS1900Mhz frequency so customer should develop this filter solution according to field test result GSM antenna is the key coupling interfering source of TDD noise Thereat pa...

Page 39: ...rd socket The reference circuit of the 8 pin SIM card holder is illustrated in the following figure Figure 32 Reference circuit of the 8 pin SIM card holder The SIM_PRESENCE pin is used for detection...

Page 40: ...d high speed signal lines z The traces should be as short as possible z Keep SIM holder s GND connect to main ground directly z Shielding the SIM card signal by ground well z Recommended to place a 1u...

Page 41: ...Description C1 VSIM SIM card power supply C2 SIM_RST SIM card reset C3 SIM_CLK SIM card clock C3 GND Connect to GND C5 GND Connect to GND C6 VPP Not connect C7 SIM_DATA SIM card data I O C8 SIM_PRE De...

Page 42: ...description Amphenol SIM card holder Pin name Signal Description C1 VSIM SIM card power 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...

Page 43: ...ote User can use AT command control PCM interface For detail please refer to document 1 4 9 1 PCM Multiplexing Function With GPIO17 and GPIO19 PCM interface can be configured as SPI or SD interface th...

Page 44: ...9 3 LCD Display SPI Interface SIM800H provides a serial interface It could be used as SPI interface in the embedded AT application Figure 37 LCD reference circuit 4 9 4 SD Card Interface Figure 38 SD...

Page 45: ...nections connections 1 which can support 25 keys connections 2 which can support 50 keys Connections 1 Figure 39 25 keys reference circuit Note According to the traditional 5 5 to design buttons when...

Page 46: ...e ESD performance the connection diagram is as following Figure 41 Keypad reference circuit Whether using a 5 5 keys or 5 5 2 keys the module can also detecte the two buttons pressed But when using a...

Page 47: ...2 22 COL2 GPIO8 COL3 21 COL3 GPIO9 COL4 24 COL4 GPIO10 ROW0 62 ROW0 GPIO11 ROW1 60 ROW1 GPIO12 ROW2 61 ROW2 GPIO13 ROW3 23 ROW3 GPIO14 ROW4 63 ROW4 GPIO15 Note Multiplexing function need different sof...

Page 48: ...ument 1 Table 27 Pin definition of the GPIO Pin name Pin number Reset state GPIO1 3 GPIO2 27 Pull down GPIO3 28 Pull down 4 13 ADC Table 28 Pin definition of the ADC Pin name Pin number Description AD...

Page 49: ...is shown in the following figure Figure 43 Reference circuit of PWM driver buzzer Table 31 Buzzer output characteristics Parameter Min Typ Max Unit Working voltage 2 5 2 8 2 9 V Working current 16 mA...

Page 50: ...4 Reference circuit of NETLIGHT 4 15 1 NETLIGHT Multiplexing Function Table 35 NETLIGHT multiplexing function Pin name Pin number Mode 0 default Mode 1 NETLIGHT 64 NETLIGHT GPIO17 Note Multiplexing fu...

Page 51: ...ame Pin number Description ISINK0 47 Sink current for LCM module ISINK1 46 Sink current for keypad LED Reference circuit is recommended in the following figure Figure 45 LED driver reference circuit T...

Page 52: ...The input impendence of the antenna should be 50 and the VSWR should be less than 2 z It is recommended that the GSM antenna and the BT antenna should be placed as far as possible z The isolations of...

Page 53: ...matching circuit should be designed as in the following figure Figure 48 GSM simple antenna matching circuit Normally R101 is 0 C101 and C102 are not mounted 4 19 2 Bluetooth antenna interface The mod...

Page 54: ...s should be kept far away from the high frequency signals and strong disturbing source 4 19 3 FM Antenna Interface The module provides 2 FM antenna pad named FM_ANT_P and FM_ANT_N these are difference...

Page 55: ...ayout at beginning will save develop schedule and cost as well This section will give some guidelines on PCB layout in order to eliminate interfere or noise by greatest degree and save product develop...

Page 56: ...though Zener diode then huge capacitor Pin 2 Pin 43 Pin 44 and Pin45 are GND signals and shortest layout to GND of power source should be designed There are 12 GND pads in middle of module these pads...

Page 57: ...Smart Decision 5 3 Recommended PCB Layout Based on above principles recommended layout is shown in the following illustration Return GND Figure 53 Recommended PCB layout SIM800H_Hardware_Design_V1 01...

Page 58: ...ameters are for digital interface pins such as keypad GPIO I2C UART LCD and PCM 6 2 Recommended Operating Conditions Table 42 Recommended operating conditions Symbol Parameter Min Typ Max Unit VBAT Po...

Page 59: ...age 2 7 V 0 36 V VOL Low level output voltage 0 4 V 6 5 SIM_VDD Characteristics Table 45 SIM_VDD characteristics Symbol Parameter Min Typ Max Unit 3 VO Output voltage 1 80 V IO Output voltage 10 mA 6...

Page 60: ...900 DCS1800 PCS1900 18 7 18 7 18 7 18 7 mA Voice call PCL 5 GSM850 EGSM900 DCS1800 PCS1900 199 48 216 12 146 48 131 77 mA mA Data mode GPRS 1Rx 4Tx GSM850 EGSM900 DCS1800 PCS1900 453 57 344 74 216 20...

Page 61: ...KV GND 6KV 12KV RXD 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 condu...

Page 62: ...table shows the module s conducted receiving sensitivity it is tested under static condition Table 52 Conducted RF receive sensitivity Frequency Receive sensitivity Typical Receive sensitivity Max GSM...

Page 63: ...Reflow Profile Figure 55 Typical solder reflow profile 7 3 The Moisture Sensitivity Level The moisture sensitivity level of SIM800H module is 3 The modules should be mounted within 168 hours after un...

Page 64: ...under the following conditions the environment temperature is lower than 40 and the air humidity is less than 90 If the condition meets one of the following ones shown below the modules should be bak...

Page 65: ...Data Circuit terminating Equipment DTE DCE interface for Short Message Service SMS and Cell Broadcast Service CBS 6 GSM 11 14 Digital cellular telecommunications system Phase 2 Specification of the S...

Page 66: ...IO13 ROW3 23 ROW3 GPIO14 ROW4 63 ROW4 GPIO15 EINT3 PWM 26 PWM GPIO16 EINT0 NETLIGHT 64 NETLIGHT GPIO17 PCMCLK 29 PCMCLK DISP_RSTB MC3CM0 GPIO18 PCMOUT 30 PCMOUT DISP_DI MC3DA3 GPIO19 PCMSYNC 65 PCMSYN...

Page 67: ...GSM Global Standard for Mobile Communications 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 M...

Page 68: ...ervice Data Phonebook 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...

Page 69: ...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 safety comes first Do...

Page 70: ...Hardware_Design_V1 01 70 2013 08 20 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 3252 3300 F...

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