Ic Pin Function - Sony HCD-RX33 Service Manual

5-10.

IC PIN FUNCTION

IC601 µPD780205GF (SYSTEM CONTROL) / PANEL BOARD
Pin No. Pin Name
1 VDD
2 POWER OUT
3 S. MUTE OUT
4 TU. MUTE OUT
5 TUNED OUT
6 TAPE REC OUT
7 DBFB NORMAL
8 NC
9 NC
10 RESET
11 X2
12 X1
13 VSS
14 NC
15 POWER DOWN IN
16 VDD
17 SOCK
18 DATA
19 SOSO
20 XLAT
21 CE
22 CLK
23 DO
24 DI
25 VSS
26 CD STB
27 FLAT
28 VSS
29 K4
30 K3
31 K2
32 K1
33 K0
34 AVDD
35 AVREF
36 A LATCH
37 B LATCH
38 SCOR
39 REMOTE IN
40 VSS
41 NC
42 VSS
43 DECK STB
44 VR UP
45 VR DOWN
46 VDD
47 FM ST IN
48 SYNC REC IN
49 VSS
50 VSS
I/O
— VDD
O Power switch output. ON: H, OFF: L
O System mute output. ON: H, OFF: L
O Tuner mute output. ON: H, OFF: L
O Surround output. ON: H, OFF: L (Not used)
O Function tape output. Tape: H, Others: L (Not used)
O DBFB normal (U2: DBFB). ON: H, Others: L
O DBFB high. ON: H, Others: L (Not used)
O Not used
— Reset input
I X'tal 4.194314 MHz
I X'tal 4.194314 MHz
— Ground
— Not used (open)
I Power down input. AC ON: H, AC OFF: L
— VDD
O CXD2508A SQCK, CLOCK output
O CXD2508A data output
I CXD2508A SQSO input
O CXD2508A XLAT output. Latch: L, Others: H
O Chip enable output to LC7218, LC75392. Data: H, Address: L
O CLK output
O Data output
I Data input
— Ground
O STB output to SN74HC4094. STB: L, Others: H
O Flat output. Flat: H, Others: L (Not used)
— Ground
I Key input 4 to A/D
I Key input 3 to A/D
I Key input 2 to A/D
I Key input 1 to A/D
I Key input 0 to A/D
O VDD of A/D converter
— Reference voltage of A/D converter
O Latch output to BU2092. Latch: H, Others: L
O Not used
I CXD2508A SCOR
I Remote signal input. ON: H, OFF: L
— Ground
O Shift or load output to SN74HC165. Shift: H, Load: L (Not used)
I Data input to SN74HC165 (Ground)
O STB output to BU2114, SN74HC4094. STB:H, Others: L (Not used)
I VR encoder A input. ON:L, OFF: H
I VR encoder B input. ON:L, OFF: H
— VDD
I FM stereo indicator input. Stereo:L, Mono: H
I Synchro record input. Record:L, Other: H
I CD encoder A input. ON: L, OFF: H (Ground)
I CD encoder B input. ON: L, OFF: H (Ground)
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Description