LH5PV16256 查看數據表（PDF） - Sharp Electronics
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LH5PV16256 Datasheet PDF : 14 Pages
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LH5PV16256
CMOS 4M (256 × 16) Pseudo-Static RAM
UWE 2
LWE 1
A7 21
A8 20
A9 19
A10 18
A11 17 A0 -
A12 16 A6 COLUMN
A13 15
ADDRESS
BUFFER
A14 14
A15 13
A16 12
A17 10
A6
A5
A4
9
8
7
A7 -
A17
ROW
ADDRESS
BUFFER
A3 6
A2 5
REFRESH
ADDRESS
A1 4
COUNTER
A0 3
EXT/INT
ADDRESS
MUX.
CS 11
CE 22
CLOCK
GENERATOR
COLUMN
DECODER
SENSE
AMPS
ROW
DECODER
MEMORY
ARRAY 8M
VBB GENERATOR
I/O
SELECTOR
DATA
IN
BUFFER
DATA
OUT
BUFFER
REFRESH
CONTROLLER
REFRESH
TIMER
RFSH 33
OE 24
Figure 2. LH5PV16256 Block Diagram
23 GND
44 GND
35 VCC
34 VCC
25 I/O0
26 I/O1
27 I/O2
28 I/O3
29 I/O4
30 I/O5
31 I/O6
32 I/O7
36 I/O8
37 I/O9
38 I/O10
39 I/O11
40 I/O12
41 I/O13
42 I/O14
43 I/O15
5PV16256S-2
PIN DESCRIPTION
PIN NAME
A7 - A17
A0 - A6
UWE, LWE
OE
RFSH
CE
FUNCTION
Row address input
Column address input
Upper/lower write enable input
Output enable input
Refresh input
Chip enable input
PIN NAME
CS
I/O8 - I/O15
I/O0 - I/O7
VCC
GND
FUNCTION
Chip select input
Upper byte data input/output
Lower byte data input/output
Power supply
Ground
2
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