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參數(shù)資料
| 型號： | K4J52324KI-HC1A0 |
| 元件分類： | DRAM |
| 英文描述： | 512M X 1 DDR DRAM, 0.2 ns, PBGA136 |
| 封裝： | HALOGEN FREE AND ROHS COMPLIANT, FBGA-136 |
| 文件頁數(shù)： | 17/61頁 |
| 文件大?。?/td> | 1364K |
| 代理商： | K4J52324KI-HC1A0 |
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K4J52324KI
datasheet
GDDR3 SGRAM
Rev. 1.2
7.8 Commands
Below Truth table-COMMANDs provides a quick reference of available commands. This is followed by a verbal description of each command. Two addi-
tional Truth Tables appear following the operation section : these tables provide current state/next state information.
[ Table 8 ] Truth Table - Commands
[ Table 9 ] Truth Table - Dm Operation
NOTE :
1. CKE is HIGH for all commands except SELF REFRESH.
2. BA0~BA1 select either the mode register or the extended mode register (BA0=0, BA1=0 select the mode register;
BA0=1, BA1=0 select extended mode register; other combinations of BA0~BA1 are reserved). A0~A11 provide the op-code
to be written to the selected mode register.
3. BA0~BA2 provide bank address and A0~A11 provide row address.
4. BA0~BA2 provide bank address; A0~A7 and A9 provide column address; A8 HIGH enables the auto precharge feature
(non persistent) , and A8 LOW disables the auto precharge feature.
5. A8 LOW : BA0~BA2 determine which bank is precharged.
A8 HIGH : All banks are precharged and BA0~BA2 are "Don’t Care."
6. This command is AUTO REFRESH if CKE is HIGH, SELF REFRESH if CKE is LOW.
7. Internal refresh counter controls row addressing; All inputs and I/Os are "Don’t Care" except for CKE.
8. DESELECT and NOP are functionally interchangeable.
9. Cannot be in powerdown or self-refresh state.
10. Used to mask write data ; provided coincident with the corresponding data.
11. Except DATA Termination disable.
Name (Function)
CS
RAS
CAS
WE
ADDR
NOTE
DESELECT (NOP)
H
X
8, 11
NO OPERATION (NOP)
L
H
X
8
ACTIVE (Select bank and activate row)
L
H
Bank/Row
3
READ (Select bank and column, and start READ burst)
L
H
L
H
Bank/Col
4
WRITE (Select bank and column, and start WRITE burst)
L
H
L
Bank/Col
4
PRECHARGE (Deactivate row in bank or banks)
L
H
L
Code
5
AUTO REFRESH or SELF REFRESH (Enter self refresh mode)
L
H
X
6, 7
LOAD MODE REGISTER
L
Op-Code
2
DATA TERMINATOR DISABLE
X
H
L
H
X
Name (Function)
DM
DQS
NOTE
Write Enable
L
Valid
Write Inhibit
H
X
10
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