Sony STR-W55 - Section 4: IC Terminal Explanations

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1VDD – Power supply.
2 CLK OUT O Direct output for communications with HCD-W55.
3 RDY IN I/O Direct input / output for communications with HCD-W55.
4 POWER ON / OFF O L : Relay ON
5 MUTE O Mute output to transistor. L : Mute ON
6,7 – – Not used.
8 427LAT O Latch output to IC105 (M62427FP).
9 LED LAT O Latch output to IC504 (M66313FP).
10 RESET I Reset terminal.
11 X2 – Oscillator connection terminal. (5MHz)
12 X1 – Oscillator connection terminal. (5MHz)
13 IC – Ground connection.
14 XT2 – Oscillator connection terminal. (32MHz)
15 XT1 – Oscillator connection terminal. (32MHz)
16 VDD – Power supply.
17 BACK UP I AC Power supply OFF.
18 COM CLK O Transfer clock output serial data.
19 COM DATA O Serial data output.
20 ST DATA IN I Serial data input from IC 1.
21 ST CE O Chip enable output to IC 1.
22 STEREO I Stereo signal input.
23 TUNED I Tuned signal input.
24 AUB OUT O Audio bus output.
25 AVSS – Ground.
26 – – Not used.
27 SUFFIX I Input for model select.
28 SPE I Spectrum analyzer signal input.
29 SPE I Spectrum analyzer signal input.
30 SPE I Spectrum analyzer signal input.
31 SPE I Spectrum analyzer signal input.
32 KYE 1 I Key data input (A/D converter).
33 KYE 2 I Key data input (A/D converter).
34 AVDD – Power supply for anlog.
35 AV REF – Reference voltage for A/D converter.
36 VOL IN A I Volume encoder input.
37 JOG IN A I JOG dial encoder input.
38 RDS CLK I Not uset.
39 AUB IN I Audio bus output.
40 V
SS – Ground.
IC501 1 ASD0204GF-011-3BA (SYSTEM CONTOROL)
SECTION 4
EXPLANATION OF IC TERMINALS
Pin No. Pin name I/O Description