Puxing PX-666, Service Manual

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ITEM DESCRIPTION I/O FUNCTION
1 EN1 I Encoder input
2 EN2 I Encoder input
3 EN3 I Encoder input
4 EN4 I Encoder input
5
CLK ROM I/O CLOCK AND EEPROM
6
CLK PLL O CLOCK AND PLL
7
CS PLL O CS PLL port
8
LD O Unlock Detection
9
DATA ROM I/O Data and eeprom
10
MIC MUTE O MIC MUTE CONTROL
11
P-AMP O Audio amplifier power supply control output
12
NC - Non-connect
13
NC - Non-connect
14
NC - Non-connect
15
AVCC - 5M Direct Current output
16
RXO O IF output
17
RXI I IF input
18
NC - Non-connect
19
NC - Non-connect
20
BEEP/QT O BEEP output /CCTCS tone signal output
21
LC O Direct current transfer filter
22
AVSS - Connect to VSS
23
APC O TX:Automatic power/RX: BPT automatic gain output
24
N/W O Width/Narrow control
25
ARX O Receiver audio output control
26
RSSI O Squelch level output control
27
AN SQL O Squelch audio output port
28
BATT Test O Battery check
29
OSC in I Internal oscillator input
30
OSC out I Internal oscillator output
31
VSS - GND
32
Reset I MCU Reset
33
Vdd I MCU 5M power input
34
DQT O DTC control output
35
SAVE O Save function control
36
P-TX O Tamsmit control
37
P-RX O Receiver control
38
TX232 O RS-232C PC output
39
EN1 I Encoder input control
40
MONI O "MONI" key input
41
PTT/RX232 I PTT key /RX232C PC input
42
DATA O PLL data output
43
LED G I LED green
44
LED R I LED red
CPU PIN FUNCTION
PX-666