4
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
2
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
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