Cinterion BGS3, Hardware Interface Description

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BGS3 Hardware Interface Description
Contents
109
BGS3_HD_v01.000d Page 4 of 109 2010-03-26
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3.5.6 Implemented Charging Technique...................................................... 41
3.5.7 Operating Modes during Charging...................................................... 42
3.6 Power Saving................................................................................................... 44
3.6.1
Network Dependency of SLEEP Modes ............................................. 44
3.6.2 Timing of the CTSx Signal in CYCLIC SLEEP Mode 7....................... 45
3.6.3 Timing of the RTSx Signal in CYCLIC SLEEP Mode 9....................... 45
3.7 Summary of State Transitions (Except SLEEP Mode)..................................... 46
3.8 SIM Interface.................................................................................................... 47
3.9 Serial Interface ASC0 ...................................................................................... 48
3.10 Serial Interface ASC1 ...................................................................................... 50
3.11 Audio Interfaces ............................................................................................... 51
3.11.1 Speech Processing ............................................................................. 52
3.11.2 Microphone Circuit .............................................................................. 52
3.11.2.1 Single-ended Microphone Input .......................................... 53
3.11.2.2 Differential Microphone Input .............................................. 54
3.11.2.3 Line Input Configuration with OpAmp ................................. 55
3.11.3 Loudspeaker Circuit ............................................................................ 56
3.11.4 Digital Audio Interface (DAI) ............................................................... 56
3.11.4.1 Master Mode ....................................................................... 58
3.11.4.2 Slave Mode ......................................................................... 59
3.12 Control Signals................................................................................................. 61
3.12.1 Synchronization Signal ....................................................................... 61
3.12.2 Using the SYNC Line to Control a Status LED ................................... 62
3.12.3 Behavior of the RING0 Line (ASC0 Interface only)............................. 63
3.12.4 PWR_IND Signal ................................................................................ 63
4 Antenna Interface...................................................................................................... 64
4.1 Antenna Installation ......................................................................................... 64
4.2 RF Line Routing Design................................................................................... 65
5 Electrical, Reliability and Radio Characteristics.................................................... 68
5.1 Absolute Maximum Ratings ............................................................................. 68
5.2 Operating Temperatures.................................................................................. 69
5.3 Storage Conditions .......................................................................................... 70
5.4 Reliability Characteristics................................................................................. 71
5.5 Pad Assignment and Signal Description.......................................................... 72
5.6 Power Supply Ratings...................................................................................... 80
5.7 Electrical Characteristics of the Voiceband Part .............................................. 83
5.7.1
Setting Audio Parameters by AT Commands ..................................... 83
5.7.2 Audio Programming Model ................................................................. 84
5.7.3 Characteristics of Audio Modes .......................................................... 85
5.7.4 Voiceband Receive Path..................................................................... 86
5.7.5 Voiceband Transmit Path.................................................................... 88
5.8 Air Interface...................................................................................................... 89
5.9 Electrostatic Discharge .................................................................................... 90