CPU PIN FUNCTION PX-777
ITEM DESCRIPTION I/O FUNCTION
1 CLK ROM I/O CLOCK AND EEPROM
2 D0 O Key scan output
3 D1 O Key scan output
4 D2 O PLL clock port/Key scan output
5 D3 O PLL data port/Key scan output
6 PLL CS O PLL CS port
7 LAMP2 O Lcd/backlight control output
8 K1 I Key scan input
9 K2 I Key scan input
10 K3 I Key scan input
11 K4 I Key scan input
12 AVDD MPU+5MV
13 RX0 O IF output control port
14 RX1 I IF input control port
15 TX1 I MIC input control port
16 TX0 O MIC output control port
17 BEEP/QT O BEEP output /CCTCS tone signal output
18 ACC MPU power filter
19 AVSS Connect to VSS
20 APC/TUNE O Automatic power &frequency automatic gain output
21 AT X O Transmitter data output select control
22 AR X I Receiver data input/audio amplifier adjustment input
23 BATT Test O Battery check /Reset
24 VOX I VOX input
25 AN SQL I Squelch signal input port
26 OSCin I Internal oscillator input
27 OSCout O Internal oscillator output
28 VSS GND
29 EN1 I Encoder data input
30 EN2 I Encoder data input
31 MONI I Monitor key input
32 Reset I CPU reset port
33 Vdd +5V power supply
34 5TC O TX power supply control output
35 LED G O LED green
36 TXD/LED R O RX232 output/ LED red
37 AFC O Audio amplifier control input
38 5CC O Power supply control output
39 P-AMP O Audio amplifier power supply control output
40 N/W/LD O Unlock detection
41 PTT/RX D I PTT key input/RX232 input
42 HT1621 CS I LCD CS port
43 LAMP1 O Backlight control output
44 DQT O DTC audio signal output
To Next Page
Loading...
