23C256 查看數據表（PDF） - NEC => Renesas Technology
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23C256 Datasheet PDF : 32 Pages
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µPD23C256112A
Pin Configurations
/xxx indicates active low signal.
48-pin PLASTIC TSOP(I) (12x18) (Normal bent)
[ µPD23C256112AGY-xxx-MJH ]
NC
1
NC
2
NC
3
IC
4
IC
5
GND
6
R, /B
7
/RE
8
/CE
9
NC
10
NC
11
VCC
12
VSS
13
NC
14
NC
15
CLE
16
ALE
17
/WE
18
IC
19
IC
20
IC
21
NC
22
NC
23
NC
24
Marking Side
48
NC
47
NC
46
NC
45
NC
44
I/O7
43
I/O6
42
I/O5
41
I/O4
40
NC
39
NC
38
NC
37
VCC
36
VSS
35
NC
34
NC
33
NC
32
I/O3
31
I/O2
30
I/O1
29
I/O0
28
NC
27
NC
26
NC
25
NC
I/O0 to I/O7
CLE
ALE
/WE
/RE
/CE
R, /BNote1
VCC
Vss
NC Note2
IC Note3
GND
: Address Inputs / Command Inputs / Data Outputs
: Command Latch Enable Input
: Address Latch Enable Input
: Write Enable Input
: Read Enable Input
: Chip Enable Input
: READY, /BUSY Output
: Supply voltage
: Ground
: No connection
: Internal connection
: GND
Notes 1. This pin is an open-drain output pin. Therefore, a pull-up resistor is required when using this pin.
2. Some signals can be applied because this pin is not connected to the inside of the chip.
3. Leave this pin unconnected or connected to VSS.
Remark Refer to Package Drawings for the 1-pin index mark.
2
Data Sheet M15902EJ2V0DS
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