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M65KG256AB Datasheet(PDF) 17 Page - STMicroelectronics

Part # M65KG256AB
Description  256Mbit (4 Banks x 4M x 16) 1.8V Supply, 133MHz Clock Rate, DDR Low Power SDRAM
PDF  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M65KG256AB Datasheet(HTML) 17 Page - STMicroelectronics

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M65KG256AB
3 Commands
17/51
Table 3.
Commands
Command(1)
1.
X = Don’t Care (VIL or VIH); V = Valid Address Input.
Symbol KEn-1
(2)
2.
Clock Enable KE must be stable at least for one clock cycle.
KEn
(2)
E
RAS
CAS
W
BA1
BA0
A0-A9,
A11-A12
A10
Mode Register Set
MRS
VIH
VIH
VIL
VIL
VIL
VIL
VIL
VIL
MR/EMR
Data(3)
3.
MR and EMR data is the value to be written in the Mode Register and Extended Mode Register, respectively.
VIL
Extended Mode Register
Set
EMRS
VIH
MR/EMR
Data(3)
Bank (Row) Activate
ACT
VIH
VIH
VIL
VIL
VIH
VIH
V
V
Row Address
Read
READ
VIH
VIH
VIL
VIH
VIL
VIH
VV
Column
Address
VIL
(4)
4.
If A10 is Low, VIL, when issuing the command, the row remains active at the end of the operation.
Read with Auto Precharge
READA
VIH
(5)
5.
If A10 is High, VIH, when issuing the command, an automatic precharge cycle is performed at the end of the operation and
the row reverts to the Idle mode.
Burst Read Terminate
BST
VIH
VIH
VIL
VIH
VIH
VIL
XX
X
Write
WRIT
VIH
VIH
VIL
VIH
VIL
VIL
VV
Column
Address
VIL
(4)
Write with Auto Precharge
WRITA
VIH
(5)
Precharge Selected Bank
PRE
VIH
VIH
VIL
VIL
VIH
VIL
V(6)
6.
If A10 is Low, VIL, when issuing the command, only the bank selected by BA0-BA1 is precharged (BA0-BA1 should be
valid).
V(6)
X
VIL
(6)
Precharge All Banks
PALL
X(7)
7.
If A10 is High, VIH, when issuing the command, all the banks are precharged and BA0-BA1 are Don’t Care.
X(7)
X
VIH
(7)
Self-Refresh Entry(8)
8.
All the banks must be idle before executing this command.
SELF
VIH
VIL
VIL
VIL
VIL
VIH
XX
X
X
Self Refresh Exit
SELFX
VIL
VIH
VIH
XX
X
XX
X
VIL
VIH
VIH
VIH
Auto Refresh(8)
REF
VIH
VIH
VIL
VIL
VIL
VIH
XX
X
Power-Down Entry(8)
PDEN
VIH
VIL
VIH
XX
X
XX
X
VIL
VIH
VIH
VIH
Power-Down Exit
PDEX
VIL
VIH
VIH
XX
X
XX
X
VIL
VIH
VIH
VIH
Deep Power-down Entry(8)
DPDEN
VIH
VIL
VIL
VIH
VIH
VIL
XX
X
Deep Power-down Exit
DPDEX
VIL
VIH
XX
X
X
X
X
X



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