參數(shù)資料
型號(hào): HYB18T512160AF-3.7
廠商: INFINEON TECHNOLOGIES AG
英文描述: 512-Mbit DDR2 SDRAM
中文描述: 512兆位DDR2 SDRAM的
文件頁數(shù): 75/117頁
文件大?。?/td> 2102K
代理商: HYB18T512160AF-3.7
Data Sheet
75
Rev. 1.3, 2005-01
09112003-SDM9-IQ3P
HYB18T512[40/80/16]0AF–[3/3S/3.7/5]
512-Mbit DDR2 SDRAM
Truth tables
H
4
Truth tables
Table 20
Function
Command Truth Table
CKE
Previous
Cycle
H
CS RAS CAS WE BA0
BA1
A[12:11] A10 A[9:0]
Note
1)2)3)
1) The state of ODT does not affect the states described in this table. The ODT function is not available during Self Refresh.
2) “X” means “H or L (but a defined logic level)”.
3) Operation that is not specified is illegal and after such an event, in order to guarantee proper operation, the DRAM must
be powered down and then restarted through the specified initialization sequence before normal operation can continue.
4) All DDR2 SDRAM commands are defined by states of CS, WE, RAS, CAS, and CKE at the rising edge of the clock.
5) Bank addresses (BAx) determine which bank is to be operated upon. For (E)MRS BA[1:0] selects an (Extended) Mode
Register.
6) V
REF
must be maintained during Self Refresh operation.
7) Self Refresh Exit is asynchronous.
8) Burst reads or writes at BL = 4 cannot be terminated. See
Chapter 3.21
for details.
9) The Power Down Mode does not perform any refresh operations. The duration of Power Down is therefore limited by the
refresh requirements outlined in
Chapter 3.24
Current
Cycle
H
(Extended) Mode
Register Set
Auto-Refresh
Self-Refresh Entry
Self-Refresh Exit
L
L
L
L
BA
OP Code
4)5)
H
H
L
H
L
H
L
L
H
L
L
L
L
L
L
L
L
X
H
L
L
L
H
H
L
L
X
H
H
H
H
L
L
H
H
X
H
L
L
H
L
L
X
X
X
X
X
X
X
X
X
X
X
X
4)
4)6)
4)6)7)
Single Bank Precharge
Precharge all Banks
Bank Activate
Write
Write with Auto-
Precharge
Read
Read with Auto-
Precharge
No Operation
Device Deselect
Power Down Entry
H
H
H
H
H
H
H
H
H
H
BA
X
BA
BA
BA
X
X
Row Address
Column
Column
L
H
X
X
4)5)
4)
4)5)
L
H
Column
Column
4)5)8)
4)5)8)
H
H
H
H
L
L
H
L
L
H
H
BA
BA
Column
Column
L
H
Column
Column
4)5)8)
4)5)8)
H
H
H
X
X
L
L
H
H
L
H
L
H
X
X
H
X
H
H
X
X
H
X
H
H
X
X
H
X
H
X
X
X
X
X
X
X
X
X
X
X
X
4)
4)
4)9)
Power Down Exit
L
H
X
X
X
X
4)9)
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