Pin No.
Pin Name
I/O
Description
21
O
O
O
O
I/O
O
I
I
I
I
I
I
I
I
I
O
—
I
O
I/O
I
O
I/O
I/O
I/O
I/O
O
O
I
I
I
O
O
O
Keypad column output 4
Keypad column output 3
Keypad column output 2
Keypad column output 1
1 = 25CH, 0 = 10CH
4 (Max.)
3
2
1 (Min.)
VOL 1
1
1
0
0
VOL 0
1
0
1
0
Keypad column input 6
Keypad column input 5
Keypad column input 4
Keypad column input 3
Keypad column input 2
Keypad column input 1
Tied to low
Normaly High, low to reset MCU
Resonator in (4.0 MHz)
Resonator out (4.0 MHz)
Ground
A/D Reference voltage input (3.0V)
LCD Control (Resister select 0 = Instruction resister, 1 = Data resister)
Combo chip CLOCK
LCD Control (0 = Write, 1 = Read)
Combo chip DATA
EEPROM DATA
Battery voltage input
EEPROM CLOCK
LCD DATA 4
LCD DATA 5
LCD DATA 6
LCD DATA 7
Combo chip STB
Transmitted DATA
Received Signal Strength Indicator
0 = Carrier present, 1 = Carrier absent
0 = RX unlock, 1 = RX lock
0 = TX unlock, 1 = TX lock
Charger detect 1 = Charging, 0 = Not charging
Received DATA
TX Power control 0 = ON, 1 = OFF
Buzzer signal
RX Power control 0 = ON, 1 = OFF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
KY OUT 4
KY OUT 3
KY OUT 2
KY OUT 1
FREQUENCY 1
VOL 1
VOL 0
KY IN 6
KY IN 5
KY IN 4
KY IN 3
KY IN 2
KY IN 1
TEST
RESET
XIN
XOUT
VSS
VREF
LCD RS
COMBO CLK
LCD RW
COMBO DATA
EP DATA
BAT DET
EP CLK
LCD DB 4
LCD DB 5
LCD DB 6
LCD DB 7
COMBO STB
TX DATA
SIG OUT
CHG DET
RX DATA
TX PWR
BPTONE
RX PWR
IC, TMP87PH47U
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