24
Pin No.
Pin Name
I/O
Description
I
O
I
I
O
O
I
O
I
—
O
O
—
I
I
O
—
—
O
I/O
O
O
I
O
I
O
O
I
I
O
—
I
OUT OF RANGE FUNCTION: 1 = YES, 0 = NO
Transmitted data
Charge detect: 1 = charging, 0 = not charging
Received data (INT3/TC3)
Low battery led (High current port): 1 = ON
Talk led (High current port): 0 = ON
Power save mode. Hi: NO, Lo = YES
Keypad LED: 0 = ON
Battery low detect: 0 = battery ok, 1 = battery low (3.25 V).
(Use COMBO chip TB31224F battery detect function)
Not connected.
Clock of EEPROM
Rx power control : 0 = ON, 1 = OFF.
Tied to low
Normally High, low to reset MCU.
Resonator in (3.58 MHz)
Resonator out (3.58 MHz)
Ground
Not connected.
Combo chip strobe signal input.
Combo chip data signal input.
Data input of EEPROM.
Data output of EEPROM.
Combo chip clock signal output.
Shunt capacitor for U.S. frequency high band: 1 = shunt capacitor.
Country channel table selection 1, 2.
TX power control : 0 = ON, 1 = OFF.
Ringer volume control
Not connected.
Keypad column output #0-#3
Buzzer signal
Received signal strength indicator: (TB31224F SIG OUT Pin)
0 = carrier present, 1 = carrier absent
0 = Rx unlock, 1 = Rx lock
0 = Tx unlock, 1 = Tx lock
Receiver volume control 1 (Lo)
Receiver volume control 2 (Hi)
Function key column input (INT5)
32.768 kHz crystal
32.768 kHz crystal
Power (VCC)
Keypad column input #0-#3
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
35
36
37
38
39
40
41-44
SQ SELECTION
TX DATA
CHARGE DET
RX DATA
LB LED
TALK LED
PC13 ZPC7
KEY LED
BATT ALARM
N.C.
CLK EEPROM
RX PWR
TEST
______
RESET
XIN
XOUT
GND
N.C.
PLL STB
PLL DATA
DI EEPROM
DO EEPROM
PLL CK
BAND
COUNTRY S1, S2
TX PWR
VOL LO
VOL HI
FN COL
XTIN
XTOUT
VDD
COL3-COL0
IC, TMP87C807U
www. xiaoyu163. com
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9
9
2
8
9
4
2
9
8
TEL 13942296513
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
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