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參數(shù)資料
| 型號： | K7B803625M |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 256Kx36 & 512Kx18 Synchronous SRAM |
| 中文描述： | 256Kx36 |
| 文件頁數(shù)： | 8/21頁 |
| 文件大?。?/td> | 582K |
| 代理商： | K7B803625M |
K7B801825M
256Kx36 & 512Kx18 Synchronous SRAM
- 8 -
Rev 5.0
November 1999
K7B803625M
SYNCHRONOUS TRUTH TABLE
Notes :
1. X means "Don
′
t Care". 2. The rising edge of clock is symbolized by
↑
.
3. WRITE = L means Write operation in WRITE TRUTH TABLE.
WRITE = H means Read operation in WRITE TRUTH TABLE.
4. Operation finally depends on status of asynchronous input pins(ZZ and OE).
CS
1
CS
2
CS
2
ADSP ADSC
ADV
WRITE
CLK
ADDRESS ACCESSED
OPERATION
H
X
X
X
L
X
X
↑
↑
↑
↑
↑
↑
↑
↑
↑
N/A
Not Selected
L
L
X
L
X
X
X
N/A
Not Selected
L
X
H
L
X
X
X
N/A
Not Selected
L
L
X
X
L
X
X
N/A
Not Selected
L
X
H
X
L
X
X
N/A
Not Selected
L
H
L
L
X
X
X
External Address
Begin Burst Read Cycle
L
H
L
H
L
X
L
External Address
Begin Burst Write Cycle
L
H
L
H
L
X
H
External Address
Begin Burst Read Cycle
X
X
X
H
H
L
H
Next Address
Continue Burst Read Cycle
H
X
X
X
H
L
H
↑
↑
↑
↑
↑
↑
↑
Next Address
Continue Burst Read Cycle
X
X
X
H
H
L
L
Next Address
Continue Burst Write Cycle
H
X
X
X
H
L
L
Next Address
Continue Burst Write Cycle
X
X
X
H
H
H
H
Current Address
Suspend Burst Read Cycle
H
X
X
X
H
H
H
Current Address
Suspend Burst Read Cycle
X
X
X
H
H
H
L
Current Address
Suspend Burst Write Cycle
H
X
X
X
H
H
L
Current Address
Suspend Burst Write Cycle
WRITE TRUTH TABLE
( x36)
Notes :
1. X means "Don
′
t Care".
2. All inputs in this table must meet setup and hold time around the rising edge of CLK(
↑
).
GW
BW
WEa
WEb
WEc
WEd
OPERATION
H
H
X
X
X
X
READ
H
L
H
H
H
H
READ
H
L
L
H
H
H
WRITE BYTE a
H
L
H
L
H
H
WRITE BYTE b
H
L
H
H
L
L
WRITE BYTE c and d
H
L
L
L
L
L
WRITE ALL BYTEs
L
X
X
X
X
X
WRITE ALL BYTEs
TRUTH TABLES
WRITE TRUTH TABLE
(x18)
Notes :
1. X means "Don
′
t Care".
2. All inputs in this table must meet setup and hold time around the rising edge of CLK(
↑
).
GW
H
H
H
H
H
L
BW
H
L
L
L
L
X
WEa
X
H
L
H
L
X
WEb
X
H
H
L
L
X
OPERATION
READ
READ
WRITE BYTE a
WRITE BYTE b
WRITE ALL BYTEs
WRITE ALL BYTEs
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