Technical data

SYSTEM CONNECTOR INTERFACE
23
LZT 123 8020 R1A
42 RD O Digital 2.75V Received Data (UART1).
Data from DCE (radio device) to DTE
(host).
43 TD3
I/O7
I
I/O
Digital 2.75V Transmitted data (UART3)
General purpose I/O 7
44 RD3
I/O8
O
I/O
Digital 2.75V Received data (UART3)
General purpose I/O 8
45 TD2 I Digital 2.75V Transmitted data (UART2).
Used for flashing the memory.
46 RD2 O Digital 2.75V Received data (UART2).
Used for flashing the memory.
47 PCMULD I Digital 2.75V DSP PCM digital audio input
48 PCMDLD O Digital 2.75V DSP PCM digital audio output
49 PCMO O Digital 2.75V Codec PCM digital audio output
50 PCMI I Digital 2.75V Codec PCM digital audio input
51 PCMSYNC O Digital 2.75V DSP PCM frame sync
52 PCMCLK O Digital 2.75V DSP PCM clock output
53 MICP I Analogue Microphone Input positive
54 MICN I Analogue Microphone Input negative
55 BEARP O Analogue Speaker output positive
56 BEARN O Analogue Speaker output negative
57 AFMS O Analogue Audio output from radio device
58 SERVICE I 2.7V Flash programming voltage for the MS.
Enable logger information if not flashing.
59 ATMS I Analogue Audio input to radio device
60 AGND - Analogue Analogue ground
5.2 General Electrical and Logical Characteristics
Many of the signals, as indicated in the table above, are high-
speed CMOS logic inputs or outputs powered from a 2.75V±5%
internal voltage regulator, and are defined as Digital 2.75V.
Whenever a signal is defined as Digital 2.75V, the following
electrical characteristics apply.
Parameter Min. Max. Units
High Level Output Voltage (V
OH
), I
o
= –2mA 2.2 2.75 V