Read Sony CDP-CX555G Service Manual online
46
CDP-CX555G
6-17. IC Pin Function Descriptions
• IC104 TC94A20F-CX4 D/A Converter, MP3 Decoder (BD Board)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 to 34
35
36
37
38
39
40
41
42
43
44
45
46, 47
48
49, 50
51
52
53
54
55
I/O
I
I
I
I
I/O
I
O
–
O
O
O
I
I
I
I
I
I
–
I
–
–
–
O
–
–
O
–
–
I
O
O
–
O
O
O
O
–
I
–
I
I
–
I
–
I
I
–
I
I
I
Pin Name
/RESET
MIMD
/MICS
/MILP
SDA
SCL
/MIACK
VDDT
SDO
BCKO
LRCKO
SDI0
BCKIA
LRCKIA
SDI1
BCKIB
LRCKIB
VDD
STANDBY
VSS
VSSL
VRAL
LO
VDAL
VDAR
RO
VRAR
VSSR
TESTP
DOUT
PO0 to PO3
VDDT
PO4
PO5
PO6
MP3REQ
VSS
IRQ
VDDM
AMUTE
FI1
VSSM
PI0, PI1
VSS
PI2, PI3
PI4/CLCK
VDD
PI5/DATA
TSTIN/SFSY
FI2/SBSY
Description
Reset input terminal “L”: reset
Microcomputer interface mode selection input “H”: I2C, “L”: TSB (fixed at “H”)
Microcomputer interface chip select signal input (fixed at “L”)
Microcomputer interface latch pulse input (fixed at “L”)
Serial data input/output
Serial clock input
Microcomputer interface acknowledge signal output (open)
Power supply (3.3V) for digital circuit
Data output (open)
Bit output (open)
LR clock output (open)
Data input 0
Bit clock input A
LR clock input A
Data input 1 (fixed at “L”)
Bit clock input B (fixed at “L”)
LR clock input B (fixed at “L”)
Power supply (2.5V) for digital circuit
Standby mode control signal input “H”: STB, “L”: normal (fixed at “L”)
Ground for digital circuit
Ground for DAC Lch
Reference voltage terminal for DAC Lch
DAC Lch signal output
Power supply (2.5V) for DAC Lch
Power supply (2.5V) for DAC Rch
DAC Rch signal output
Reference voltage terminal for DAC Rch
Ground for DAC Rch
Terminal for test “H”: test mode, “L”: normal (fixed at “L”)
SPDIF signal output (open)
General purpose output (open)
Power supply (3.3V) for digital circuit
General purpose output (LMUTE signal output)
General purpose output (RMUTE signal output)
General purpose output (open)
Interrupt request signal output to the system control (IC501)
Ground for digital circuit
External interrupt signal input (open)
Power supply (2.5V) for the internal 1Mbit SRAM
Flag signal input 0 (AMUTE signal input)
Flag signal input 1 (fixed at “L”)
Ground for the internal 1Mbit SRAM
General purpose input (fixed at “L”)
Ground for digital circuit
General purpose input (fixed at “L”)
General purpose input/SUBQ interface clock input or output (fixed at “L”)
Power supply (2.5V) for digital circuit
General purpose input/SUBQ interface data input (fixed at “L”)
Terminal for test/SUBQ interface frame sync input (fixed at “L”)
Flag signal input 2/SUBQ interface block sync input (fixed at “L”)
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