Table of Contents
Advertisement
Pin
Signal Name
28
ADC3
29
SDA
30
SCL
31
BUZZER
32
OUT3
KEYCOL3
DSR
33
LED
IO6
34
VIO
35
TX_ON
36
RI
KEYCOL2
O2
37
DTR
KEYROW1
IN1
38
DCD
KEYCOL1
O1
39
RTS
IO9
40
CTS
KEYCOL4
O4
41
TD
42
RD
43
TD3
I/O7
44
RD3
I/O8
45
TD2
46
RD2
47
PCMULD
48
PCMDLD
LZT 123 7589 R1A
5. SYSTEM CONNECTOR INTERFACE
Dir
Signal Type
I
Analogue
I/O
2.75V, internal
pull up
O
2.75V, internal
pull up
O
Digital 2.75V
O
Digital 2.75V
O
O
O
Digital 2.75V
I/O
O
Power Out
2.75 V
O
Digital 2.75V
O
Digital 2.75V
O
O
I
Digital 2.75V
I
I
O
Digital 2.75V
O
O
I
Digital 2.75V
I/O
O
Digital 2.75V
O
O
I
Digital 2.75V
O
Digital 2.75V
I
Digital 2.75V
I/O
O
Digital 2.75V
I/O
I
Digital 2.75V
O
Digital 2.75V
I
Digital 2.75V
O
Digital 2.75V
Description
Analogue to digital converter 3
2
I
C data
2
I
C clock
Buzzer output from radio device
General purpose output 3
Keyboard column 3
Data set ready (UART1)
Flashing LED
General purpose I/O 6
Radio device power indication. VIO is a
2.75 V at 75 mA output supply that can
be used to power external circuitry that
interfaces to the radio device
This output indicates when the GSM
radio device is going to transmit the
burst
Ring Indicator (UART1)
Keyboard column 2
General purpose output 2
Data Terminal Ready (UART1)
Keyboard row 1
General purpose input 1
Data Carrier Detect (UART1)
Keyboard column 1
General purpose output 1
Request To Send (UART1)
General purpose I/O 9
Clear To Send (UART1)
Keyboard column 4
General purpose output 4
Transmitted Data (UART1).
Data from DTE (host) to DCE (radio
device).
Received Data (UART1).
Data from DCE (radio device) to DTE
(host).
Transmitted data (UART3)
General purpose I/O 7
Received data (UART3)
General purpose I/O 8
Transmitted data (UART2).
Used for flashing the memory.
Received data (UART2).
Used for flashing the memory.
DSP PCM digital audio input
DSP PCM digital audio output
21
Advertisement
Table of Contents
