IS43DR32800A-37CBLI-TR ISSI, IS43DR32800A-37CBLI-TR Datasheet - Page 35

• Manufacturer Part Number: IS43DR32800A-37CBLI-TR
• Description: DRAM 256M (8Mx32) 266MHz DDR2 1.8v
• Manufacturer: ISSI

Specifications of IS43DR32800A-37CBLI-TR

• Product Category: DRAM
• Rohs: yes
• Factory Pack Quantity: 1500

IS43DR32800A, IS43/46DR32801A
TRUTh TABLES
Operation or timing 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 speechified initialization sequence before normal
operation can continue.
Command Truth Table
Notes:
1. All DDR2 SDRAM commands are defined by states of CS, RAS, CAS , WE and CKE at the rising edge of the clock.
2. Bank addresses BA0, BA1 (BA) determine which bank is to be operated upon. For (E)MRS BA selects an (Extended) Mode Register.
3. Burst reads or writes at BL=4 cannot be terminated or interrupted. See sections "Reads interrupted by a Read" and "Writes interrupted by a
4. The Power Down Mode does not perform any refresh operations. The duration of Power Down is therefore limited by the refresh requirements
5. The state of ODT does not affect the states described in this table. The ODT function is not available during Self Refresh. See section 3.4.4.
6. “X” means “H or L (but a defined logic level)”
7. Self refresh exit is asynchronous.
8. VREF must be maintained during Self Refresh operation.
9. BAx and Axx refers to the MSBs of bank addresses and addresses, respectively.
10. For Standard Page-Size option, A12 is not used for Row addressing, but is used for MRS and EMR. (OP Code)
11. For Reduced Page-Size option, A8 is not used for column addressing.
Integrated Silicon Solution, Inc. — www.issi.com
Rev. 00E
09/08/2010
Function
(Extended) Mode
Register Set (Load
Mode)
Refresh (REF)
Self Refresh Entry
Self Refresh Exit
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
Power Down Exit
Write" for details.
Previous
Cycle
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
CKE
Current
Cycle
H
H
H
H
H
H
H
H
H
H
H
X
X
L
L
CS
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
RAS
H
H
H
H
H
H
H
H
L
L
L
X
L
L
L
X
X
X
CAS
H
H
H
H
H
H
H
L
L
L
X
L
L
L
L
X
X
X
WE
H
H
H
H
H
H
H
H
H
L
X
L
L
L
L
X
X
X
BA1 -
BA0
BA
BA
BA
BA
BA
BA
BA
X
X
X
X
X
X
X
X
A11, A9
A12,
X
X
X
X
X
X
X
X
X
X
X
X
X
Row Address
OP Code
A10
H
H
H
X
X
X
X
X
X
X
L
L
L
Column
Column
Column
Column
A8-A0
X
X
X
X
X
X
X
X
X
1, 2, 10
1, 2, 10
1, 2, 3,
1, 2, 3,
1, 2, 3,
1, 2, 3,
Notes
1, 7, 8
1, 8
1, 2
1, 4
1, 4
11
11
11
11
1
1
1
1
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