Technical data

LZT 123 8020 R1B

5.2 General Electrical and Logical Characteristics ........................................23

5.2.1 General Protection Requirements................................................24

5.3 Grounds...................................................................................................24

5.3.1 Analogue Ground - AGND ...........................................................24

5.3.2 Digital Ground - DGND ................................................................25

5.4 VCC - Regulated Power Supply Input .....................................................25

5.5 Battery Charging Input (CHG_IN)(Reserved for future use) ....................26

5.6 Turning the Radio Device ON/OFF and the External Power Signal.........27

5.6.1 VIO - 2.75V Supply ......................................................................29

5.7 Analogue Audio .......................................................................................30

5.7.1 Audio To Mobile Station - ATMS..................................................30

5.7.2 Audio From Mobile Station - AFMS .............................................31

5.7.3 Microphone Signals .....................................................................32

5.7.4 Speaker Signals...........................................................................33

5.8 PCM Digital Audio ...................................................................................34

5.8.1 PCM Data Format........................................................................35

5.9 Serial Data Interfaces ..............................................................................37

5.9.1 UART1 (RS232) - RD, TD, RTS, CTS, DTR, DSR, DCD and RI .38

5.9.2 Serial Data Signals - RD, TD .......................................................38

5.9.3 Control Signals - RTS, CTS, DTR, DSR, DCD, RI.......................39

5.9.4 UART2 - TD2, RD2......................................................................40

5.9.5 UART3 - TD3, RD3......................................................................41

5.10 SIM Card Related Signals .......................................................................41

5.10.1 SIM Detection - SIMPRESENCE .................................................42

5.11 Service/Programming ..............................................................................43

5.12 Buzzer .....................................................................................................43

5.13 LED 43

5.14 General Purpose Digital I/O Ports ...........................................................44

5.15 Extended I/O capabilities.........................................................................45

5.15.1 LED/IO6 Capabilities....................................................................45

5.15.2 I#/O#............................................................................................45

5.15.3 UART3/IO# ..................................................................................46

5.15.4 IO#/ADC# ....................................................................................46

5.16 General Purpose Analogue I/O Ports ......................................................46

5.16.1 Digital to Analogue Converter - DAC ...........................................46

5.16.2 Analogue to Digital Converters 1, 2 and 3 - ADCx.......................47

5.16.3 Analogue to Digital Converters 4 and 5 - IOx/ADCx ....................48

5.17 External I

C Serial Control Bus...............................................................49

5.18 TX_ON - Burst Transmission...................................................................50

5.19 Real Time Clock ......................................................................................50

6 Antenna Connector........................................................................... 52

7 Hints for Integrating the Radio Device ............................................. 53

7.1 Safety Advice and Precautions................................................................53

7.1.1 General ........................................................................................53