參數(shù)資料
型號(hào)： 70V657S12BFG8
廠商： INTEGRATED DEVICE TECHNOLOGY INC
元件分類： SRAM
英文描述： 32K X 36 DUAL-PORT SRAM, 12 ns, PBGA208
封裝： 15 X 15 MM, 1.40 MM HEIGHT, 0.80 MM PITCH, FPBGA-208
文件頁數(shù)： 22/24頁
文件大小： 316K
代理商： 70V657S12BFG8
7
IDT70V659/58/57S
High-Speed 3.3V 128/64/32K x 36 Asynchronous Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
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 I—Read/Write and Enable Control(1,2)
OE
SEM
CE0
CE1
BE3
BE2
BE1
BE0
R/W
Byte 3
I/O27-35
Byte 2
I/O18-26
Byte 1
I/O9-17
Byte 0
I/O0-8
MODE
X
H
X
High-Z
Deselected–Power Down
X
H
X
L
X
High-Z
Deselected–Power Down
X
H
L
H
X
High-Z
All Bytes Deselected
X
H
L
H
L
High-Z
DIN
Write to Byte 0 Only
X
H
L
H
L
H
L
High-Z
DIN
High-Z
Write to Byte 1 Only
XH
L
H
L
H
L
High-Z
DIN
High-Z
Write to Byte 2 Only
X
H
LH
H
L
DIN
High-Z
Write to Byte 3 Only
X
H
L
H
L
High-Z
DIN
Write to Lower 2 Bytes Only
X
H
L
H
LLH
H
L
DIN
High-Z
Write to Upper 2 bytes Only
X
H
L
H
LL
LLL
DIN
Write to All Bytes
L
H
L
H
L
H
High-Z
DOUT
Read Byte 0 Only
LH
H
LH
H
High-Z
DOUT
High-Z
Read Byte 1 Only
LH
H
L
H
High-Z
DOUT
High-Z
Read Byte 2 Only
LH
H
DOUT
High-Z
Read Byte 3 Only
L
H
L
H
L
H
High-Z
DOUT
Read Lower 2 Bytes Only
LH
L
H
DOUT
High-Z
Read Upper 2 Bytes Only
LH
L
H
DOUT
Read All Bytes
H
L
H
L
X
High-Z
Outputs Disabled
4869 tbl 02
Truth Table II – Semaphore Read/Write Control(1)
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.
3. Each byte is controlled by the respective BEn. To read data BEn = VIL.
Inputs(1)
Outputs
Mode
CE(2)
R/W
OE
BE3
BE2
BE1
BE0
SEM
I/O1-35
I/O0
H
LLLLL
L
DATAOUT
DATAOUT Read Data in Semaphore Flag(3)
H
↑
XXXX
L
X
DATAIN
Write I/O0 into Semaphore Flag
L
XXXXXX
L
______
Not Allowed
4869 tbl 03
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