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IC DESCRIPTION
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IC, TMP87C408M
3 7 63 1515 0
Pin No.
Pin Name
1
XOUT
2
XIN
3
TEST
4
NC
5
PAGE KEY
6
DTMF 5
7
DTMF 4
8
DTMF 3
9
DTMF 2
10
DTMF 1
DTMF 0
11
OUT RANGE
L SEIZE
12
100/600
13
SIG OUT
14
VSS
TE
BAND
L 13942296513
15
Frequency 1
16
COMBO CLK
17
COMBO DATA
18
COMBO STB
19
TX PWR
TX DATA
20
M/B
21
INUSE/CHG LED
22
ANT LED
23
T/P SW
24
RX DATA
25
CHG DET
26
RING DET
27
RESET
28
VDD
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I/O
O
Resonator out (4.0 MHz)
I
Resonator in (4.0 MHz)
I
Tied low
I
Not connected
I
PAGE Key 1 = PAGE ON, 0 = Standby
O
DTMF DATA 5
O
DTMF DATA 4
O
DTMF DATA 3
O
DTMF DATA 2
O
DTMF DATA 1
DTMF DATA 0
I/O
Normaly High (Pull up)
Line Seize 1 = Line Seize
I/O
Flush Time select 1 = 100ms, 0 = 600ms
Received Signal Strength Indicator
0 = Carrier present, 1 = Carrier absent
I
0 = RX unlock, 1 = RX lock
0 = TX unlock, 1 = TX lock
—
Ground
Shunt capacitor frequency high band 1 = Shunt
I/O
1 = 25CH, 0 = 10CH
O
Combo chip CLOCK
O
Combo chip DATA
O
Combo chip STB
O
TX Power control 0 = ON, 1 = OFF
Transmitted DATA
I/O
Make Break rate select 1 = 33.3%, 0 = 40.0%
O
INUSE/CHG LED 0 = ON
O
ANT LED 0 = ON
I
T/P SW input 1 = Pulse, 0 = Tone
I
Received DATA
I
Charger detect 0 = Charging, 1 = Not charging
I
Ringer detect 0 = Ring
I
Normaly High, low to reset MCU
—
Power (VDD)
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2 9
8
Description
Q Q
3
6 7
1 3
1 5
co
.
20
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9
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