Read Sony STR-DA90ESG Service Manual online
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DIGITAL BOARD IC3412 SSP424023FJ88 (DIGITAL SIGNAL PROCESSOR)
Pin No.
Pin Name
I/O
Function
1
AGND
—
Ground terminal (for address bus buffer)
2
MCS0
O
Chip select signal output to the external RAM device Not used (open)
3
MA15
O
4
MA14
O
Address signal output to the S-RAM (IC3411)
5
MA13
O
6
AVCC
—
Power supply terminal (+5V) (for address bus buffer)
7
MA12
O
Address signal output to the S-RAM (IC3411)
8
AGND
—
Ground terminal (for address bus buffer)
9
QVCC
—
Power supply terminal (+5V) (for internal logic)
10
QGND
—
Ground terminal (for internal logic)
11
MA11
O
12
MA10
O
13
MA9
O
14
MA8
O
15
AGND
—
Ground terminal (for address bus buffer)
16
MA7
O
Address signal output to the S-RAM (IC3411)
17
AVCC
—
Power supply terminal (+5V) (for address bus buffer)
18
MA6
O
19
MA5
O
Address signal output to the S-RAM (IC3411)
20
MA4
O
21
AGND
—
Ground terminal (for address bus buffer)
22
MA3
O
23
MA2
O
24
MA1
O
25
MA0
O
26
SCK
I
Serial data reading clock signal input from the master controller (IC3413)
27
EXTAL
I
Master clock signal input terminal (3MHz)
28
QVCC
—
Power supply terminal (+5V) (for internal logic)
29
QGND
—
Ground terminal (for internal logic)
30
PINIT
I
Initialize input for the PLL circuit (fixed at “L”)
31
PGND
—
Ground terminal (for PLL circuit)
32
PCAP
I
Connected to the external capacitor for PLL circuit filter
33
PVCC
—
Power supply terminal (+5V) (for PLL circuit)
34
SGND
—
Ground terminal (for serial port)
35
MISO
I
Communication data input from the master controller (IC3413)
36
RESET
I
Reset signal input from the master controller (IC3413) “L”: reset
37
MODA
I
Mode selection terminal (fixed at “H”)
38
MODB
I
Mode selection terminal (fixed at “L”)
39
MODC
I
Mode selection terminal (fixed at “H”)
40
SVCC
—
Power supply terminal (+5V) (for serial port)
41
MOSI
O
Communication data output to the master controller (IC3413)
42
SS
I
SPI slave select signal input from the master controller (IC3413)
43
HREQ
I
Host request signal input from the master controller (IC3413)
44
SGND
—
Ground terminal (for serial port)
45
SDO2
O
Audio serial data output terminal (for rear side speaker)
Address signal output to the S-RAM (IC3411)
Address signal output to the S-RAM (IC3411)
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