參數(shù)資料
型號(hào): K4S160822D
廠商: SAMSUNG SEMICONDUCTOR CO. LTD.
英文描述: 2Mx8 SDRAM 1M x 8bit x 2 Banks Synchronous DRAM LVTTL
中文描述: 2Mx8 SDRAM的1M × 8位× 2銀行同步DRAM LVTTL
文件頁數(shù): 28/46頁
文件大小: 1183K
代理商: K4S160822D
K4S160822D
CMOS SDRAM
- 28
Rev. 1.0 (Oct. 1999)
FUNCTION TRUTH TABLE (TABLE 2)
Current
State
CS
RAS
CAS
WE
ADDR
ACTION
Note
X
H
L
L
L
L
X
X
H
L
L
L
L
X
X
H
L
L
L
L
L
L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
RA
X
OP Code
X
X
X
X
X
Self
Refresh
INVALID
Exit Self Refresh --> Idle after t
RFC
(ABI)
Exit Self Refresh --> Idle after t
RFC
(ABI)
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Self Refresh)
INVALID
Exit Power Down --> ABI
Exit Power Down --> ABI
ILLEGAL
ILLEGAL
ILLEGAL
NOP (Maintain Low Power Mode)
Refer to Table 1
Enter Power Down
Enter Power Down
ILLEGAL
ILLEGAL
Row (& Bank) Active
Enter Self Refresh
Mode Register Access
NOP
Refer to Operations in Table 1
Begin Clock Suspend next cycle
Exit Clock Suspend next cycle
Maintain Clcok Suspend
X
X
H
H
H
L
X
X
X
H
H
H
L
X
X
X
H
H
H
L
L
L
X
X
X
X
X
X
X
H
H
L
X
X
X
X
H
H
L
X
X
X
X
H
H
L
H
L
L
X
X
X
X
X
X
X
H
L
X
X
X
X
X
H
L
X
X
X
X
X
H
L
X
H
H
L
X
X
X
X
X
6
6
7
7
8
8
8
9
9
All
Banks
Idle
*Note :
6. CKE low to high transition is asynchronous.
7. CKE low to high transition is asynchronous if restarts internal clock.
A minimum setup time 1CLK + t
SS
must be satisfied before any command other than exit.
8. Power down and self refresh can be entered only from the both banks idle state.
9. Must be a legal command.
Abbreviations : ABI = All Banks Idle, RA = Row Address
CKE
(n-1)
H
L
L
L
L
L
L
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
H
H
L
L
X
H
H
H
H
H
L
X
H
H
H
H
H
L
H
L
L
L
L
L
L
L
L
H
L
H
L
CKE
n
All
Banks
Precharge
Power
Down
Any State
other than
Listed
above
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