SIM908_Hardware Design_V1.07
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SIM908_Hardware Design_V1.07
Smart Machine Smart Decision
Document Title Version Date Status Document Control ID
SIM908 Hardware Design 1.07 2011-12-13 Release SIM908_ห้องสมุดไป่ตู้ardware Design_V1.07
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2011
SIM908_Hardware Design_V1.07
2
2011-12-13
Smart Machine Smart Decision
Contents
Contents.................................................................................................................................................................... 3 Version History ........................................................................................................................................................ 7 1 2 Introduction....................................................................................................................................................... 8 SIM908 Overview ............................................................................................................................................. 8 2.1 SIM908 Key Features............................................................................................................................... 8 2.2 Operating Modes .....................................................................................................................................11 2.3 SIM908 Functional Diagram .................................................................................................................. 12 Package Information ...................................................................................................................................... 13 3.1 Pin out Diagram...................................................................................................................................... 13 3.2 Pin Description ....................................................................................................................................... 14 3.3 Package Dimensions............................................................................................................................... 16 3.4 Mechanical Dimensions of the RF Connector........................................................................................ 17 GSM Application Interface ............................................................................................................................ 18 4.1 Power Supply.......................................................................................................................................... 18 4.1.1 Minimizing Voltage Drop of VBAT ................................................................................................... 19 4.1.2 Monitoring Power Supply ................................................................................................................... 19 4.2 Power on/down Scenarios ...................................................................................................................... 19 4.2.1 Power on SIM908 ............................................................................................................................... 19 4.2.2 Power down SIM908........................................................................................................................... 21 4.2.3 Restart SIM908 by PWRKEY Pin ...................................................................................................... 22 4.3 Power Saving Mode................................................................................................................................ 23 4.3.1 Minimum Functionality Mode ............................................................................................................ 23 4.3.2 Sleep Mode 1 (AT+CSCLK=1) .......................................................................................................... 23 4.3.3 Wake Up SIM908 from Sleep Mode 1 (AT+CSCLK=1) ................................................................... 23 4.3.4 Sleep Mode 2 (AT+CSCLK=2) .......................................................................................................... 24 4.3.5 Wake Up SIM908 from Sleep Mode 2 (AT+CSCLK=2) ................................................................... 24 4.4 Charging Interface .................................................................................................................................. 24 4.4.1 Battery Pack Characteristics................................................................................................................ 25 4.4.2 Recommended Battery Pack ............................................................................................................... 25 4.4.3 Implemented Charging Technique ...................................................................................................... 25 4.4.4 Operating Modes during Charging...................................................................................................... 26 4.4.5 Charger Requirements......................................................................................................................... 27 4.5 RTC Backup ........................................................................................................................................... 27 4.6 Serial Interfaces ...................................................................................................................................... 29 4.6.1 Function of Serial Port and Debug Port .............................................................................................. 29 4.6.2 Software Upgrade and Debug ............................................................................................................. 30 4.7 Audio Interfaces ..................................................................................................................................... 31 4.7.1 Speaker Interface Configuration ......................................................................................................... 31 4.7.2 Microphone Interfaces Configuration ................................................................................................. 32 4.7.3 Earphone Interface Configuration....................................................................................................... 32 4.7.4 Audio Electronic Characteristics......................................................................................................... 32 4.8 SIM Card Interface ................................................................................................................................. 33
General Notes SIMCom offers this information as a service to its customers, to support application and engineering efforts that use the products designed by SIMCom. The information provided is based upon requirements specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search for additional relevant information, including any information that may be in the 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 integrator. All specifications supplied herein are subject to change. Copyright This document contains proprietary technical information which is the property of SIMCom Limited, copying of this document and giving it to others and the using or communication of the contents thereof, are forbidden without express authority. Offenders are liable to the payment of damages. All rights reserved in the event of grant of a patent or the registration of a utility model or design. All specification supplied herein are subject to change without notice at any time.
Smart Machine Smart Decision
Document Title Version Date Status Document Control ID
SIM908 Hardware Design 1.07 2011-12-13 Release SIM908_ห้องสมุดไป่ตู้ardware Design_V1.07
Copyright © Shanghai SIMCom Wireless Solutions Ltd. 2011
SIM908_Hardware Design_V1.07
2
2011-12-13
Smart Machine Smart Decision
Contents
Contents.................................................................................................................................................................... 3 Version History ........................................................................................................................................................ 7 1 2 Introduction....................................................................................................................................................... 8 SIM908 Overview ............................................................................................................................................. 8 2.1 SIM908 Key Features............................................................................................................................... 8 2.2 Operating Modes .....................................................................................................................................11 2.3 SIM908 Functional Diagram .................................................................................................................. 12 Package Information ...................................................................................................................................... 13 3.1 Pin out Diagram...................................................................................................................................... 13 3.2 Pin Description ....................................................................................................................................... 14 3.3 Package Dimensions............................................................................................................................... 16 3.4 Mechanical Dimensions of the RF Connector........................................................................................ 17 GSM Application Interface ............................................................................................................................ 18 4.1 Power Supply.......................................................................................................................................... 18 4.1.1 Minimizing Voltage Drop of VBAT ................................................................................................... 19 4.1.2 Monitoring Power Supply ................................................................................................................... 19 4.2 Power on/down Scenarios ...................................................................................................................... 19 4.2.1 Power on SIM908 ............................................................................................................................... 19 4.2.2 Power down SIM908........................................................................................................................... 21 4.2.3 Restart SIM908 by PWRKEY Pin ...................................................................................................... 22 4.3 Power Saving Mode................................................................................................................................ 23 4.3.1 Minimum Functionality Mode ............................................................................................................ 23 4.3.2 Sleep Mode 1 (AT+CSCLK=1) .......................................................................................................... 23 4.3.3 Wake Up SIM908 from Sleep Mode 1 (AT+CSCLK=1) ................................................................... 23 4.3.4 Sleep Mode 2 (AT+CSCLK=2) .......................................................................................................... 24 4.3.5 Wake Up SIM908 from Sleep Mode 2 (AT+CSCLK=2) ................................................................... 24 4.4 Charging Interface .................................................................................................................................. 24 4.4.1 Battery Pack Characteristics................................................................................................................ 25 4.4.2 Recommended Battery Pack ............................................................................................................... 25 4.4.3 Implemented Charging Technique ...................................................................................................... 25 4.4.4 Operating Modes during Charging...................................................................................................... 26 4.4.5 Charger Requirements......................................................................................................................... 27 4.5 RTC Backup ........................................................................................................................................... 27 4.6 Serial Interfaces ...................................................................................................................................... 29 4.6.1 Function of Serial Port and Debug Port .............................................................................................. 29 4.6.2 Software Upgrade and Debug ............................................................................................................. 30 4.7 Audio Interfaces ..................................................................................................................................... 31 4.7.1 Speaker Interface Configuration ......................................................................................................... 31 4.7.2 Microphone Interfaces Configuration ................................................................................................. 32 4.7.3 Earphone Interface Configuration....................................................................................................... 32 4.7.4 Audio Electronic Characteristics......................................................................................................... 32 4.8 SIM Card Interface ................................................................................................................................. 33
General Notes SIMCom offers this information as a service to its customers, to support application and engineering efforts that use the products designed by SIMCom. The information provided is based upon requirements specifically provided to SIMCom by the customers. SIMCom has not undertaken any independent search for additional relevant information, including any information that may be in the 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 integrator. All specifications supplied herein are subject to change. Copyright This document contains proprietary technical information which is the property of SIMCom Limited, copying of this document and giving it to others and the using or communication of the contents thereof, are forbidden without express authority. Offenders are liable to the payment of damages. All rights reserved in the event of grant of a patent or the registration of a utility model or design. All specification supplied herein are subject to change without notice at any time.