Sony STR-DA90ESG Service Manual page 20

DIGITAL BOARD IC3412 SSP424023FJ88 (DIGITAL SIGNAL PROCESSOR)
Pin No. Pin Name I/O
1 AGND —
2 MCS0 O
3 MA15 O
4 MA14 O
5 MA13 O
6 AVCC —
7 MA12 O
8 AGND —
9 QVCC —
10 QGND —
11 MA11 O
12 MA10 O
13 MA9 O
14 MA8 O
15 AGND —
16 MA7 O
17 AVCC —
18 MA6 O
19 MA5 O
20 MA4 O
21 AGND —
22 MA3 O
23 MA2 O
24 MA1 O
25 MA0 O
26 SCK I
27 EXTAL I
28 QVCC —
29 QGND —
30 PINIT I
31 PGND —
32 PCAP I
33 PVCC —
34 SGND —
35 MISO I
36 RESET I
37 MODA I
38 MODB I
39 MODC I
40 SVCC —
41 MOSI O
42 SS I
43 HREQ I
44 SGND —
45 SDO2 O
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Ground terminal (for address bus buffer)
Chip select signal output to the external RAM device Not used (open)
Address signal output to the S-RAM (IC3411)
Power supply terminal (+5V) (for address bus buffer)
Address signal output to the S-RAM (IC3411)
Ground terminal (for address bus buffer)
Power supply terminal (+5V) (for internal logic)
Ground terminal (for internal logic)
Address signal output to the S-RAM (IC3411)
Ground terminal (for address bus buffer)
Address signal output to the S-RAM (IC3411)
Power supply terminal (+5V) (for address bus buffer)
Address signal output to the S-RAM (IC3411)
Ground terminal (for address bus buffer)
Address signal output to the S-RAM (IC3411)
Serial data reading clock signal input from the master controller (IC3413)
Master clock signal input terminal (3MHz)
Power supply terminal (+5V) (for internal logic)
Ground terminal (for internal logic)
Initialize input for the PLL circuit (fixed at "L")
Ground terminal (for PLL circuit)
Connected to the external capacitor for PLL circuit filter
Power supply terminal (+5V) (for PLL circuit)
Ground terminal (for serial port)
Communication data input from the master controller (IC3413)
Reset signal input from the master controller (IC3413) "L": reset
Mode selection terminal (fixed at "H")
Mode selection terminal (fixed at "L")
Mode selection terminal (fixed at "H")
Power supply terminal (+5V) (for serial port)
Communication data output to the master controller (IC3413)
SPI slave select signal input from the master controller (IC3413)
Host request signal input from the master controller (IC3413)
Ground terminal (for serial port)
Audio serial data output terminal (for rear side speaker)
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Function