MC52i Hardware Interface Description
Contents
97
MC52i_HD_v01.200 Page 4 of 97 2008-8-19
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3.5.8 Switch off during Charge-only Mode................................................... 40
3.6 Power Saving................................................................................................... 41
3.6.1 No Power Saving (AT+CFUN=1) ........................................................ 41
3.6.2 NON-CYCLIC SLEEP Mode (AT+CFUN=0)....................................... 41
3.6.3 CYCLIC SLEEP Mode (AT+CFUN=5, 6, 7, 8) .................................... 42
3.6.4 CYCLIC SLEEP Mode AT+CFUN=9 .................................................. 42
3.6.5 Timing of the CTS Signal in CYCLIC SLEEP Modes.......................... 42
3.6.6 Wake up MC52i from SLEEP Mode.................................................... 44
3.6.6.1 Wake-up via RTS0 and RTS1 (if AT+CFUN=0 or
AT+CFUN=9)45
3.7 Summary of State Transitions (except SLEEP Mode) ..................................... 46
3.8 RTC Backup..................................................................................................... 47
3.9 Serial Interface ASC0 ...................................................................................... 48
3.10 Serial Interface ASC1 ...................................................................................... 50
3.11 Audio interfaces ............................................................................................... 51
3.11.1 Microphone Circuit .............................................................................. 52
3.11.2 Speech Processing ............................................................................. 53
3.11.3 DAI Timing .......................................................................................... 53
3.12 SIM Interface.................................................................................................... 54
3.12.1 Requirements for using the CCIN Pin................................................. 55
3.12.2 Design Considerations for SIM Card Holder....................................... 56
3.13 Control signals ................................................................................................. 57
3.13.1 Inputs .................................................................................................. 57
3.13.2 Outputs ............................................................................................... 57
3.13.2.1 Synchronization Signal........................................................ 57
3.13.2.2 Using the SYNC Pin to Control a Status LED ..................... 58
3.13.2.3 Behavior of the RING0 Line (ASC0 Interface only)............. 60
4 Antenna Interface...................................................................................................... 61
4.1 Antenna Installation ......................................................................................... 61
4.1.1 Antenna Pad ....................................................................................... 63
4.1.1.1 Suitable Cable Types .......................................................... 63
4.1.2 Hirose Antenna Connector.................................................................. 64
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 Electrical Specifications of the Application Interface........................................ 72
5.6 Power Supply Ratings...................................................................................... 79
5.7 Electrical Characteristics of the Voiceband Part .............................................. 80
5.7.1 Setting Audio Parameters by AT Commands ..................................... 80
5.7.2 Audio Programming Model ................................................................. 81
5.7.3 Characteristics of Audio Modes .......................................................... 82
5.7.4 Voiceband Receive Path..................................................................... 83
5.7.5 Voiceband Transmit Path.................................................................... 84