Read Sony MEX-1GP Service Manual online
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MEX-1GP
• IC902 PL-2518ALQ64 (USB I/F) (KEY BOARD (2/2))
Pin No.
Pin Name
I/O
Pin Description
1
SM_RB
I
SDRAM ready/busy signal input
2
SM_ALE
O
SDRAM address latch enable signal output
3
SUSPEND
O
Suspend indicator output (Not used (Open))
4
SM_CEL
O
SDRAM command latch enable signal output
5
SM_WEB
O
SDRAM write enable signal output
6
SM_REB
O
SDRAM read enable signal output
7
SM_CEB7
—
Not used (Open)
8
SM_CEB6
—
Not used (Open)
9
SM_CEB5
—
Not used (Open)
10
SM_CEB4
—
Not used (Open)
11
VCC3
—
Power supply (+3.3V)
12
SM_CEB3
—
Not used (Open)
13
SM_CEB2
—
Not used (Open)
14
SM_CEB1
—
Not used (Open)
15
SM_CEB0
O
SDRAM chip enable signal output
16
DIO11
I/O
SDRAM data 11 input/output (Not used (Open))
17
DIO0
I/O
SDRAM data 0 input/output
18
GND
—
Ground
19
LED
O
Data access light signal output
20
DIO1
I/O
SDRAM data 1 input/output
21
DIO12
I/O
SDRAM data 12 input/output (Not used (Open))
22
DIO2
I/O
SDRAM data 2 input/output
23
DIO13
I/O
SDRAM data 13 input/output (Not used (Open))
24
DIO3
I/O
SDRAM data 3 input/output
25
VCC25
—
Power supply (+2.5V)
26
WPB
O
SDRAM write protect signal output
27
DIO4
I/O
SDRAM data 4 input/output
28
DIO14
I/O
SDRAM data 14 input/output (Not used (Open))
29
DIO5
I/O
SDRAM data 5 input/output
30
DIO15
I/O
SDRAM data 15 input/output (Not used (Open))
31
DIO6
I/O
SDRAM data 6 input/output
32
VCC3
—
Power supply (+3.3V)
33
WPBIN
I
Connected resister to VCC
34
DIO7
I/O
SDRAM data 7 input/output
35
GND
—
Ground
36
NC
—
Not used (Open)
37
NC
—
Not used (Open)
38
RESETJ
I
Optional external power on reset signal input
39
TEST
—
Not used (Open)
40
VCC25
—
Power supply (+2.5V)
41
GND
—
Ground
42
XSCI
I
Crystal oscillation input (12 MHz)
43
XSCO
O
Crystal oscillation output (12 MHz)
44
AVCC3
—
Power supply (+3.3V)
45
AGND
—
Ground
46
RREF
I
Connected external reference resister to ground
47
DM
I/O
High speed D+ signal input/output
48
DP
I/O
High speed D- signal input/output
49
AGND
—
Ground
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