Ic Pin Function Description - Sony HCD-D390 - Compact Audio And Video System Service Manual

6-28. IC PIN FUNCTION DESCRIPTION

MAIN BOARD IC301 µPD780018Y (MAIN CONTROL)
Pin No. Pin Name
1 TA-MUTE
2 DBFB-H/L
3 427-LT
4 KCON-LT
5 KCON-ON/OFF
6 F-RELAY
7 R-RELAY
8 PL-RELAY
9 TEST
10 X2
11 X1
12 VDD
13 XT2
14 XT1
15 RESET
16 INT/IN
17 INT/IN/OUT
18 SCOR
19 SOFT-TEST
20 AC-CUT
21 RDS-INT
22 RDS-DATA
23 VDD
24 AVDD
25 ADJ
26 A-SHUT
27 B-SHUT
28 B-HALF
29 CLK-CHECK
30 SPEC-IN
31 ADJ 2
32 DEMO-CHANGE
33 AVss
34 SQ-DATA-IN
35 —
36 SQ-CLK
37 SW-ON/OFF
38, 39 FUNC 1, 2
40 Vss
41 VOL-LAT
42 PL-LAT
43 COM-DIN
44 COM-DOUT
45 COM-CLK
46 CD-POWER
47 CD-DATA
48 CD-CLOK
49 MSM-CMD
50 MSM-BUSY
I/O Function
O Line mute signal output
O DBFB H/L select signal output
O Latch signal output for IC201 (62427)
O
Not used
O
O Front speaker relay control output
O
Not used
O
I Connected ground
O
X'tal (5MHz)
I
– Power supply (+5V)
O
X'tal (32.768 KHz)
I
I Reset signal input
I
Connected ground
I
O Sub code data request signal output
O Software test port
I Back up signal input
I RDS signal input
I RDS data input
– Power supply (+5V)
I Analog reference voltage input
I CD adjust point port
I A Deck reel pulse detector
I B Deck reel pulse detector
I Half detector signal input
I Connected ground
I Version select signal input
I Connected ground
I DEMO H/L select signal input
– Ground
I Sub code Q data input
– Not used
I Sub code Q data clock input
O Not used
I Connected ground
– Ground
O
Not used
O
I Connected ground
O Common serial data output
O Common serial clock output
O CD power on signal output
O CD data output
O CD clock output
O Not used
I Connected ground
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