Sony SCD-XA777ES / Mode d’emploi, Service Manual

Page: 78 / 137

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SCD-XA777ES
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MAIN BOARD IC701 CXD1882R-1 (SACD DECODER)
Pin No. Pin Name I/O Description
1, 2 D5, D6 I/O
Two-way data bus with the CPU (IC901) and I/O expander (IC902)
3 VSS —
Ground terminal (digital system)
4 D7 I/O
Two-way data bus with the CPU (IC901) and I/O expander (IC902)
5 A0 I
Address signal input from the CPU (IC901)
6 VDD — Power supply terminal (+3.3V) (digital system)
7 A1 I
Address signal input from the CPU (IC901)
8 VDD5V —
Power supply terminal (+5V)
9 to 14 A2 to A7 I Address signal input from the CPU (IC901)
15 VSS —
Ground terminal (digital system)
16 XWAIT O
Wait signal output terminal Not used (open)
17 XRD I
Read strobe signal input from the CPU (IC901)
18 XWR I
Write strobe signal input from the CPU (IC901)
19 XCS I
Chip select signal input from the CPU (IC901)
20, 21 XINT0, XINT1 O
Interrupt signal output to the CPU (IC901)
22 VDD — Power supply terminal (+3.3V) (digital system)
23 XHRS I
Not used (open)
24 HDB7 O
Stream data signal output to the DSD decoder (IC801)
25 VSS — Ground terminal (digital system)
26 HDB8 O
Error flag signal output to the DSD decoder (IC801)
27 HDB6 O
Stream data signal output to the DSD decoder (IC801)
28 VDDS — Power supply terminal (+5V) (digital system)
29 HDB9 O
Not used (open)
30 HDB5 O
Stream data signal output to the DSD decoder (IC801)
31 HDBA O Not used (open)
32 HDB4 O
Stream data signal output to the DSD decoder (IC801)
33 VSS —
Ground terminal (digital system)
34 HDBB O Not used (open)
35 HDB3 O
Stream data signal output to the DSD decoder (IC801)
36 VDD —
Power supply terminal (+3.3V) (digital system)
37 HDBC O
Not used (open)
38 VDDS —
Power supply terminal (+5V) (digital system)
39 HDB2 O
Stream data signal output to the DSD decoder (IC801)
40 HDBD O
Not used (open)
41 HDB1 O Stream data signal output to the DSD decoder (IC801)
42 VSS —
Ground terminal (digital system)
43 HDBE O
Not used (open)
44 HDB0 O Stream data signal output to the DSD decoder (IC801)
45 HDBF O
Not used (open)
46 XSAK O
Serial data effect flag signal output to the DSD decoder (IC801)
47 VDDS — Power supply terminal (+5V) (digital system)
48 XDCK O
Serial data transfer clock signal output to the DSD decoder (IC801)
49 XSHD O
Header flag signal output to the DSD decoder (IC801)
50 VDD — Power supply terminal (+3.3V) (digital system)
51 REDY O
Not used (pull up)
52 VSS —
Ground terminal (digital system)
53 XHAC I Serial data request signal input from the DSD decoder (IC801)