JVC CA-UXP55, Service Manual

Page: 38 / 42

1-38 (No.22036)
4.14 UPD780055GC-045 (IC931) : Micon
• Pin layout
• Pin function
60 ~ 41
1 ~ 20
40 ~
21
61 ~
80
Pin No. Symbol I/O Function
1 SAFETY0 I Irregular voltage detection 0
2 REST/OP_SW/CL_SW I REST/CLOSE switch detect port
3 SCD I CD safety voltage detect port
4 AVSS - GND
5 NC - Not use
6 NC - Not use
7 AVREF1 - Reference voltage
8 SUBQ/RDDA I Q-code data input port
9 NC - Not use
10 SQCK O Q-code serial clock
11 STAT I Status input port
12 MDATA O Data input port
13 MCLK O Data clock
14 RST O Reset
15 MLD O Command ready signal
16 MUTE O Mute control port
17 SDATA/VOLDA O Serial data / Volume data
18 SCK/VOLCK O Serial clock / Volume clock
19 FLAG - Not use
20 CLOSE I Door close switch input port
21 OPEN I Door open switch input port
22 FCD O CD Function ('H'=CD)
23 NC - Not use
24 NC - Not use
25 VOLCE O Volumn Chip Enable
26 NC - Not use
27 LINEMUTE O Line mute
28 PBMUTE O Playback mute
29 SMUTE O System mute
30 SPKMUTE O Speaker mute
31 AHB O AHB control
32 POUT O Power On/Off ('H'=Power On)
33 VSS - GND
34 PROTECTOR O Protector
35 MODEL1 I MODEL setting
36 MODEL2 I MODEL setting