Alinco DR-61 OT/E, Service Manual

Page: 15 / 89

8) Front CPU I/O Port (IC501)
No.
| Pin Ñame Function I I/O I Logic | Description
1 PC3/AN11
- -
2 AVSS GND
I
-
3 TEST
- I
-
4
X2
-
0
-
5
X1
- I -
6 VSS GND I
-
7 OSC1 OSC1
I
System clock
8
OSC2 OSC2 o System clock
9 RES RES
I
CPU reset
10
MDO MDO I (Mode terminal)
11 P20/IRQ4/ADTRG FUP
I
Active Low
Microphone up key input
12 P21/UD FDN I Active Low Microphone down key input
13 P22 PTT
I
Active Low PTT key input
14 P23 FUNC
I
Active Low Function key input
15 P24 LM
I
Active Low LM key input
16 P25 SRCH
I
Active Low Search key input
17
P26 SCAN I Active Low Scan key input
18 P27 TSQ I Active Low TSQ key input
19 P30/SCK1 RPT
I
Active Low RPT key input
20 P31/SI1 REV I Active Low REV key input
21 P32/S01 CALL
I
Active Low CALL key input
22 P33/SCK2 MHZ I Active Low MHz key input
23 P34/SI2 MR
I
Active Low MR key input
24
P35/S02
VFO
l Active Low VFO key input
25 P36/STRB LED1
I Active High
Key illumination LED ON
26 P37/CS LED2 l Active High Key illumination while FUNC key is pressed.
27 VSS
-
I
- -
28 V3 V3
I -
LCD power supply
29 V2 V2 I
-
LCD power supply
30
V1
V1
I -
LCD power supply
31 VCC
-
I
-
-
32 PA3/COM4 NC
I
- -
33 PA2/COM3
COM3
o
-
LCD common output 3
34 PA1/COM2
COM2
o
-
LCD common output 2
35 PAO/COM 1 COM1 o
-
LCD common output 1
36
P50/WKP0/SEG1
NC
- - -
37
P51/WKP1/SEG2
NC
- -
-
38 P52/WKP2/SEG3
NC
- - -
39
P53/WKP3/SEG4
NC
- - -
40 P54/WKP4/SEG5
NC
- - -
41 P55/WKP5/SEG6
NC
- - -
42 P56/WKP6/SEG7
NC
- - -
43
r57/VvKP7/3EG8
NC
-
- -
44 P60/SEG9
NC
-
-
-
45
P61/SEG10
NC
- - -
46 P62/SEG11
NC
- - -
47
P63/SEG12
NC
- - -
48
P64/SEG13
NC
- - -
49 P65/SEG14 NC
- - -
50
P66/SEG15
NC
- - -