Panasonic KX-TC1464LCB, Service Manual

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Pin Port Label Init I/O Description Remark
1
XOUT
XOUT O 4MHz crystal oscillator
2
XIN
XIN I 4MHz crystal oscillator
3
TEST
TEST I Must be connected to Vss
4
P67
RING_SW/
C_MUTE
L
I Ringer on/off switch
H: RINGER
L: RINGER
5
P66
P66 H O
6
P65
R3 H I Keyin 3
7
P64
R2 L I Keyin 2
8
P63
R1 L I Keyin 1
9
P62
RSSI L I Carrier detect input (combo chip
sigout) H: carrier present
10
P61
TX_DATA L I TX path data output
11
P60
RX_PWR H O RX power control for LNA & RX
circuit L: RX power
12
P77
E_MUTE H O TALK LED L: LED ON
13
P76
POW_DWN_IN I Power Down Detect in
H:
L: Detect
14
VSS
VSS Ground
15
P75
STB L O COMBO STROBE H: ENABLE
16
P74
DATA H O COMBO DATA
17
P73
CLK H O COMBO CLOCK
18
P72
TX_PWR H O TX POWER CONTROL L: TX POWER
19
P17
C4 L O Keyout 4, normal low output
20
P16
C3 L O Keyout 3, normal low output
21
P15
C2 L O Keyout 2, normal low output
22
P14
C1 L O Keyout 1, normal low output
23
P13
BUZZ H O Beep tone output, normal low output
24
P12
RX_DATA L I RX DATA INPUT
25
P11
CH_DET L I CHARGE DETECT L: ON CHARGE
CRADLE
26
P10
L_BATT L I LOW BATTERY DETECT L: BATTERY
27
RESET
RESET I
28
VDD
VCC Power supply (battery voltage)
21. EXPLANATION OF IC TERMINALS (RF UNIT)
21.1. IC1
32