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7.2 PARTS
7.2.1 IC
• The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.
PDC059A (U-COM ASSY : IC2501)
• System Microcomputer
•
Pin Function
No. Pin Name I/O
1
TIN
O Loader mechanism motor close
2
SOL
O Solenoid control
3
XMOTOR
O Cassette mechanism motor control
4
S.CLK
I
System bus clock
5
XRESET
I
Reset input
6
E+5V
I
Connect to VDD
−
7
NC
Not used
8
E+5V
I
Connect to VDD
−
9
GNDD
GND
10 6MHz
I
Connect a crystal resonator
11 6MHz
O
−
12 E+5V
Power supply +5V
13 KEY1
I
AD key data input
14 KEY2
I
15 MS
I
MS audio signal input
16 SENSE
I
Sensing pulse input
17 XMODE
I
Cassette mechanism mode SW input
−
18 NC
Not used
19 XRECR
I
REV REC detection SW input
20 XCrO
(SW)
I
CrO
2
2
21 XHALF
I
Tape detection SW input
22 NC
0
Non connection
23 XRECF
I
FWD REC detection SW
−
24 NC
Not used
Pin Function
position detection SW input
No. Pin Name I/O
25 POFF
I
AC input detection
26 S.R/E
I/O System bus request
27 S.DOUT
O System bus output data
28 S.DIN
I
System bus input data
−
29 NC
Not used
30 AM56
I
System 5.6 input
31 XTEST
I
Test mode detection input
32 POWER
O Power control
33 LINEMUTE
O Line mute control
34 LEDDATA
O IC DATA output for LED control
35 LEDCE
O IC OK output for LED control
36 LEDCLK
O IC output for LED control
37 PB MUTE
O CLK (Not used)
38 MODEL
I
Model switch input
39 DOLBY
O DOLBY NR control
40 XOPEN
I
Loader mechanism open SW control
41 XCLOSE
I
Loader mechanism close SW input
−
42 NC
Not used
43 PB/XREC
O DOLBY PB/REC control
44 RECMUTE
O REC MUTE control
45 XCrO
O Normal / CrO
2
46 BIAS
O BIAS control
47 TOUT
O Loader mechanism motor open
−
48 NC
Not used
CT-IS21
Pin Function
control
2
33
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