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LZT 123 1836 5
5.11.2 SERIAL DATA SIGNALS (DTM1, DFM1)............................................................... 54
5.11.2.1 SERIAL DATA FROM WIRELESS MODEM (DFM1) .............................................. 54
5.11.2.2 SERIAL DATA TO WIRELESS MODEM (DTM1) .................................................. 54
5.11.3 CONTROL SIGNALS (RTS1, CTS1, DTR1, DSR1, DCD1, RI).................................. 55
5.11.3.1 HARDWARE FLOW CONTROL RTS1 AND CTS1 ............................................... 55
5.11.3.2 REQUEST TO SEND (RTS1)............................................................................. 55
5.11.3.3 CLEAR TO SEND (CTS1) ................................................................................ 55
5.11.3.4 DATA TERMINAL READY (DTR1).................................................................... 55
5.11.3.5 DATA SET READY (DSR1) .............................................................................. 56
5.11.3.6 DATA CARRIER DETECT (DCD1) .................................................................... 56
5.11.3.7 RING INDICATOR (RI).................................................................................... 56
5.11.4 UART2 (DTM2, DFM2)...................................................................................... 57
5.11.4.1 TRANSMITTED DATA (DTM2)........................................................................ 57
5.11.4.2 RECEIVED DATA (DFM2)................................................................................ 57
5.11.4.3 REQUEST TO SEND (RTS2)............................................................................. 57
5.11.4.4 CLEAR TO SEND (CTS2) ................................................................................ 57
5.11.5 USB ................................................................................................................. 58
5.11.6 SIM CARD INTERFACE ...................................................................................... 59
5.11.7 SIM DETECTION (SIMDET)................................................................................. 60
5.12 SYNCHRONOUS SERIAL PORT (SSP) INTERFACE [TO BE IMPLEMENTED IN A FUTURE RELEASE] ...... 60
5.13 MEMORY CARD INTERFACE (SD/MMC) [TO BE IMPLEMENTED IN A FUTURE RELEASE]........... 61
5.13.1 MULTIMEDIA CARD SYSTEM ............................................................................. 61
5.13.2 SECURE DIGITAL MEMORY CARD SYSTEM ......................................................... 62
5.14 SERVICE/PROGRAMMING ..................................................................................... 63
5.15 LED [TO BE IMPLEMENTED IN A FUTURE RELEASE] .............................................................. 63
5.16 GENERAL PURPOSE IO.......................................................................................... 65
5.16.1 EMBEDDED APPLICATIONS ............................................................................... 66
5.17 KEYBOARD SIGNALS (KEYROW, KEYCOL) .............................................................. 67
5.18 ANALOGUE TO DIGITAL CONVERTERS (ADIN1, ADIN2, ADIN3, ADIN4).................. 67
5.19 BURST TRANSMISSION (TX_ON)............................................................................ 69
5.20 REAL TIME CLOCK............................................................................................... 69
5.20.1 REAL TIME CLOCK BACKUP SUPPLY (VRTC) ....................................................... 70
5.20.2 RTC ALARM (ALARM) ....................................................................................... 71
5.20.2.1 ALARM OUTPUT FROM THE MODULE ............................................................ 71
5.20.3 ALARM UTILIZATION AS A WAKE-UP................................................................. 72
5.21 RINGER OUTPUT (BUZZER) [TO BE IMPLEMENTED IN A FUTURE RELEASE] ............................ 73
6 Antenna Connector .............................................................................. 74