Read Sony NW-S21 / NW-S23 Service Manual online
17
NW-S21/S23
•
IC Pin Function Description
MAIN BOARD IC400 CXR704060-201GA (SYSTEM CONTROLLER, D/A CONVERTER)
Pin No.
Pin Name
I/O
Description
1
VDIO0
—
Power supply terminal (+2.8V) (for I/O interface)
2 to 9
A12 to A19
O
Address signal output to the NOR flash memory/S-RAM
10 to 13
PN4 to PN7
I
Not used
14
DVSS7
—
Ground terminal
15 to 22
FAD0 to FAD7
I/O
Two-way data bus with the NAND flash memory
23
FCLE
O
Command latch enable signal output to the NAND flash memory
24
FALE
O
Address latch enable signal output to the NAND flash memory
25
VDIODF
—
Power supply terminal (+2.8V) (for internal flash memory interface)
26
XFWE
O
Write signal output to the NAND flash memory
27
XFRE
O
Read signal output to the NAND flash memory
28
XFWP
O
Write protect signal output to the NAND flash memory
29
XFCE0
O
Chip enable signal output to the NAND flash memory
30
FRB0
I
Ready/busy selection signal input from the NAND flash memory “L”: busy, “H”: ready
31
XFCE1
O
Chip enable signal output terminal Not used
32
FRB1
I
Ready/busy selection signal input terminal Not used
33, 34
PP0, PR1
I
Not used
35
DVDD0
—
Power supply terminal (+1.2V)
36
DVSS1
—
Ground terminal
37
VDIO1
—
Power supply terminal (+2.8V) (for I/O interface)
38 to 53
D0 to D15
I/O
Two-way data bus with the NOR flash memory/S-RAM
54 to 56
PA0 to PA2
I
Not used
57
XSCK0
O
Serial clock signal output to the liquid crystal display unit
58
SO0
O
Serial data output to the liquid crystal display unit
59
PC2
O
Power on/off control signal output terminal “H”: power on
60
XSCS0
O
Chip select signal output to the liquid crystal display unit
61
DVSS2
—
Ground terminal
62
VDIO2
—
Power supply terminal (+2.8V) (for I/O interface)
63
KDI
I
Serial data input terminal Not used
64
KRB
I
Ready/busy selection signal input terminal Not used
65
KCLK
O
Serial clock signal output terminal Not used
66
KCS
O
Chip select signal output terminal Not used
67
KDO
O
Serial data output terminal Not used
68
TRST
I
Reset signal input terminal for scan test Not used
69
TXD0
O
Transmit data output terminal Not used
70
RXD0
I
Receive data input terminal Not used
71
TXD1
O
Transmit data output terminal Not used
72
RXD1
I
Receive data input terminal Not used
73
XSCK1
O
Serial clock signal output to the real time clock
74
SO1
O
Serial data output to the real time clock
75
SI1
I
Serial data input from the real time clock
76
XSCS1
O
Chip select signal output to the real time clock
77
XOUT
O
Main oscillation output terminal Not used
78
DVDD1
—
Power supply terminal (+1.2V)
79
DVSS3
—
Ground terminal
80
VDIO3
—
Power supply terminal (+2.8V) (for I/O interface)
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