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IC DESCRIPTION
QQ
IC, TMP87C408N
3 7 63 1515 0
Pin No.
1
2
3
HOOK CONT
4
5
CHAG DET
6
CLK EEPROM
7
8-10
DTMF3-DTMF1
11
COUNTRY S2
12
COUNTRY S1
TE
13
L 13942296513
14
15
16
17
DO EEPROM DI EEPROM
18
19
20
HOOK DET
21
SCRET OPT
22
23
24
www
25
26
.
SQ SELECTION
27
28
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Pin Name
I/O
XOUT
O
Oscillator out
XIN
I
Oscillator in
TEST
I
Tied low
Hook control output (for corded phone): 0 = OFF HOOK, 1 = ON HOOK
For ZPC-6: this pin is used as Speaker Amp, IC Mute Control)
O
(the Mic Mute control is controlled by hardware: unmute mic when Speaker is unmute
SPK MUTE
and charge not detected)
Received Signal Strength Indicator: (TB31224F SIG OUT pin)
0 = carrier present, 1 = carrier absent NOISE DETECT
SIG OUT
I
0 = Rx unlock, 1 = Rx lock
0 = Tx unlock, 1 = Tx lock
Charge detect: 0 = charging, 1 = not charging.
I/O
Clock of EEPROM
DTMF4
O
DTMF data pin 4 (Most Significant Bit)
O
DTMF data pin 3-1
DTMF0
DTMF data pin 0 (Least Significant Bit)
I/O
Country option select 2.
RING OFF
Control the shunt resistor: 1 = shunt a resistor (For U, K ONLY)
I/O
Country option select 1
PAGE KEY
I
PAGE key: 1 = PAGE ON, 0 = STANDBY
GND
—
Ground
PLL STB
O
Combo chip strobe signal (TB31224F)
PLL DATA
Combo chip data signal (TB31224F).
O
U LED
In-use LED: 1 = ON, 0 = OFF.
PLL CK
Combo chip clk signal (TB31224F).
I/O
Data Input/Output of EEPROM.
TL RELAY
O
Line seize: 1 = line seize, 0 = off-hook
TL MUTE
Telephone Line Mute Control: 1 = MUTE.
I/O
M B SEL
Make/Break Ratio Select 1 = 33.3%, 0 = 40%
Hook detect input (for Corded Phone). 1 = ON HOOK, 0 = OFF HOOK
I
REMARK: this pin is always PULL-HIGH for ZPC-7 or ZPC-6 (I. e. just imagine
Corded phone is Always ON HOOK)
TX PWR
Tx power control: 0 = ON, 1 = OFF. Secret function option: 1 = YES, 0 = NO
I/O
REMARK: this PULL LOW for ZPC-7 or ZPC-6 (I. e. Secret opt is DISABLED)
TX DATA
O
Transmit data output
BUZZER
Buzzer signal (key tone and paging sound ONLY)
I/O
T P SEL
Tone/Pulse selection: 1 = Pulse, 0 = Tone
RX DATA
I
Received data input
RING DET
I
Ring detect input: 1 = OFF, 0 = RING COME (MC34012)
x
ao
y
BAND
Shunt capacitor for U.S. Frequency Higher Band: 1 = shunt Cap, OUT OF RANGE
I/O
i
FUNCTION: 1 = YES, 0 = NO
____________
RESET
I
Normally High, Low to reset MCU
POWER
—
Power (VCC)
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8
Q Q
3
6 7
1 3
u163
.
21
2 9
9 4
2 8
Description
Rx LOCK DETECT
Tx LOCK DETECT
1 5
0 5
8
2 9
9 4
m
co
9 9
2 8
9 9
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