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70T651S12BFG PDF预览

70T651S12BFG

更新时间： 2022-12-29 20:40:56
品牌 Logo 应用领域
艾迪悌 - IDT /
页数 文件大小 规格书
28页 739K
描述
HIGH-SPEED 2.5V 256/128K x 36 ASYNCHRONOUS DUAL-PORT STATIC RAM

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70T651S12BFG 数据手册

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IDT70T651/9S  
High-Speed 2.5V 256/128K x 36 Asynchronous Dual-Port Static RAM  
Industrial and Commercial Temperature Ranges  
Truth Table I—Read/Write and Enable Control(1,2)  
Byte 3  
I/O27-35  
Byte 2  
I/O18-26  
Byte 1  
I/O9-17  
Byte 0  
I/O0-8  
CE  
X
1
R/W  
X
X
X
L
ZZ  
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
MODE  
OE  
X
X
X
X
X
X
X
X
X
X
L
SEM CE  
0
BE  
3
BE  
2
BE  
1
BE0  
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
X
X
X
H
H
H
H
L
X
X
H
H
H
L
X
X
H
H
L
X
X
H
L
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z Deselected–Power Down  
High-Z Deselected–Power Down  
High-Z All Bytes Deselected  
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
X
DIN  
Write to Byte 0 Only  
H
H
H
L
L
D
IN  
High-Z Write to Byte 1 Only  
High-Z Write to Byte 2 Only  
High-Z Write to Byte 3 Only  
H
H
L
L
D
IN  
High-Z  
High-Z  
H
H
L
L
D
IN  
High-Z  
High-Z  
H
L
L
High-Z  
DIN  
DIN  
Write to Lower 2 Bytes Only  
H
L
H
L
L
DIN  
DIN  
High-Z  
High-Z Write to Upper 2 bytes Only  
L
L
L
DIN  
DIN  
DIN  
DIN  
Write to All Bytes  
Read Byte 0 Only  
H
H
H
L
H
H
L
H
L
L
H
H
H
H
H
H
H
X
X
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
DOUT  
L
H
H
H
L
DOUT  
High-Z Read Byte 1 Only  
High-Z Read Byte 2 Only  
High-Z Read Byte 3 Only  
L
H
H
L
DOUT  
High-Z  
High-Z  
L
H
H
L
DOUT  
High-Z  
High-Z  
L
H
L
High-Z  
DOUT  
DOUT  
Read Lower 2 Bytes Only  
High-Z Read Upper 2 Bytes Only  
Read All Bytes  
L
H
L
H
L
DOUT  
DOUT  
High-Z  
L
L
L
DOUT  
DOUT  
DOUT  
DOUT  
H
X
L
L
L
L
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z  
High-Z Outputs Disabled  
High-Z High-Z Sleep Mode  
X
X
X
X
5632 tbl 02  
NOTES:  
1. "H" = VIH, "L" = VIL, "X" = Don't Care.  
2. It is possible to read or write any combination of bytes during a given access. A few representative samples have been illustrated here.  
Truth Table II – Semaphore Read/Write Control(1)  
Inputs(1)  
BE  
Outputs  
(2)  
R/W  
H
I/O1-35  
I/O  
0
Mode  
CE  
OE  
L
BE  
3
2
BE  
1
BE  
0
SEM  
H
H
L
L
X
X
L
X
X
L
X
X
L
L
L
L
L
DATAOUT  
DATAOUT Read Data in Semaphore Flag(3)  
X
X
______  
DATAIN  
Write I/O  
0
into Semaphore Flag  
↑
______  
X
X
X
Not Allowed  
5632 tbl 03  
NOTES:  
1. There are eight semaphore flags written to I/O0 and read from all the I/Os (I/O0-I/O35). These eight semaphore flags are addressed by A0-A2.  
2. CE = L occurs when CE0 = VIL and CE1 = VIH. CE = H when CE0 = VIH and/or CE1 = VIL.  
3. Each byte is controlled by the respective BEn. To read data BEn = VIL.  
7
1...45678910...28

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