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• HAND MAIN BOARD IC501
SH665316A-4J84 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
Function
1
BEEP
O
BEEP output
2
VSS
—
Ground
3
OSC1
I
Clock input
4
OSC2
O
Clock output
5
VDD
—
Power supply
6
RESET
I
Reset input
7
RING MODE
I
RING ON/OFF selection
H: RING ON
8
—
Not used (Open)
9
TEST
I
For test
10
HOLD
I
HOLD signal input
11
ROW1
O
12
ROW2
O
Row side of 4
×
6 key matrix
13
ROW3
O
14
ROW4
O
15
COL0
I
16
COL1
I
Column side of 4
×
6 key matrix
17
COL2
I
18
COL3
I
19
LED
O
TALK LED control
L: LED ON
Not used (Open)
20
EEPROM DATA
I/O
EEPROM data input/output
21
EEPROM CLK
O
EEPROM data clock output
22
LCD E
O
Liquid crystal display read/write triger output
23
LCD VDD CTRL
O
Liquid crystal display power supply control
24
KEY LED
—
Not used (Open)
25
LCD R/W
O
Liquid crystal display read/write control
H: Read
L: Write
26
LCD RS
O
Liquid crystal display register select signal output
27
ROW5
O
Row side of 4
×
6 key matrix
28
ROW6
O
29
—
Not used (Open)
30
—
31
MODEL SELECT
I
Model selection
L: SPP-A400
32
TEST SW
I
For test mode start
H: Start
33
TEST ACT
I
Intermittent receive trigger in TEST mode
H: Start
34
BATT DET
I
Battery detection
H: BATT present
35
RSSI H/L
O
RSSI gain selection
L: Low gain
36
BATT LOW
I
Battery voltage input
L: BATT Low
37
BEEP ATT
O
BEEP volume control
L: High
38
ACT4
O
Intermittent receiving control
In operation: L
39
MIC MUTE
O
Microphone ON/OFF control
L: OFF
40
TEST CH
O
Channel setting in TEST mode
L: Read
41
TX+B CTRL
O
TX Power supply control
L: TX ON
42
SIG IN
I
RSSI, LOCK signal input
L: RSSI detected
43
PLL STB
O
PLL control signal output
44
PLL DATA
O
PLL data output
45
PLL CLK
O
PLL clock output
46
RX DATA
I
Receiving data input
47
CHG DET
I
Charging detection
H: CHG ON
48
TX DATA
O
Transmission data ternary output
Summary of Contents for SPP-A400 - Cordless Telephone With Answering Machine
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