Table of Contents
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Pin
Signal Name
1
VCC
2
DGND
3
VCC
4
DGND
5
VCC
6
DGND
7
VCC
8
DGND
9
VCC
10
DGND
11
CHG_IN
12
DGND
13
IO5
ADC4
14
ON/OFF
15
SIMVCC
16
SIMPRESENCE
17
SIMRST
18
SIMDATA
19
SIMCLK
20
DAC
21
IO1
KEYROW2
22
IO2
ADC5
23
IO3
KEYROW3
24
IO4
KEYROW4
25
VRTC
26
ADC1
27
ADC2
LZT 123 7589 R1A
5. SYSTEM CONNECTOR INTERFACE
Under the heading "Dir" in the table, radio device input and output signals
are indicated by the letters I and O respectively.
Dir
Signal Type
-
Supply
-
-
-
Supply
-
-
-
Supply
-
-
-
Supply
-
-
-
Supply
-
-
-
Battery
charge power
-
-
I/0
Digital 2.75V
I
Analogue
I
Internal pull
up, open drain
-
Digital 3 V/5 V
I
Internal pull
up, open drain
O
Digital 3 V/5 V
I/O
Digital 3 V/5 V
O
Digital 3 V/5 V
O
Analogue
I/O
Digital 2.75V
I
I/O
Digital 2.75V
I
Analogue
I/O
Digital 2.75V
I
I/O
Digital 2.75V
I
I
Supply 1.8V
I
Analogue
I
Analogue
Description
Power supply
Digital ground
Power supply
Digital ground
Power supply
Digital ground
Power supply
Digital ground
Power supply
Digital ground
Battery charging
Digital ground
General purpose input/output 5
Analogue to digital converter 4
Turns the radio device on and off.
SIM card power supply. Power output
from radio device for SIM Card
SIM Presence
A "1" indicates that the SIM is missing; a
"0" that it is inserted
SIM card reset
SIM card data
SIM card clock
Digital to analogue converter
General purpose input/output 1
Keyboard row 2
General purpose input/output 2
Analogue to digital converter 5
General purpose input/output 3
Keyboard row 3
General purpose input/output 4
Keyboard row 4
Supply for real time clock
Analogue to digital converter 1
Analogue to digital converter 2
20
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