A43E06321 AMIC Technology, Corp., A43E06321 Datasheet - Page 9

• Manufacturer Part Number: A43E06321
• Description: 512k x 32-Bit x 2 Banks Low Power Synchronous Dram
• Manufacturer: AMIC Technology, Corp.

Simplified Truth Table
Register
Extended Mode Register Set
Refresh
Bank Active & Row Addr.
Read &
Column Addr. Auto Precharge Enable
Write &
Column Addr. Auto Precharge Enable
Burst Stop
Precharge
Clock Suspend or
Active Power Down
Precharge Power Down Mode
DQM
No Operation Command
Deep Power Down Entry
Deep Power Down Exit
Note : 1. OP Code: Operand Code
PRELIMINARY
2. MRS can be issued only when all banks are at precharge state.
3. Auto refresh functions is same as CBR refresh of DRAM.
4. BA: Bank select address.
5. During burst read or write with auto precharge, new read/write command cannot be issued.
7. DQM sampled at positive going edge of a CLK masks the data-in at the very CLK (Write DQM latency is 0)
8. After Deep Power Down mode exit, a full new initialization of the memory device is mandatory.
6. Bust stop command is valid at every burst length.
A0~A10, BA: Program keys. (@MRS, EMRS)
A new command can be issued after 2 clock cycle of MRS, EMRS.
The automatical precharge without Row precharge command is meant by “Auto”.
Auto/Self refresh can be issued only when all banks are at precharge state.
Another bank read/write command can be issued at every burst length.
but masks the data-out Hi-Z state after 2 CLK cycles. (Read DQM latency is 2)
Mode Register Set
Auto Refresh
Self
Refresh
Auto Precharge Disable
Auto Precharge Disable
Bank Selection
Both Banks
Command
(July, 2005, Version 0.0)
Entry
Exit
Entry
Entry
Exit
Exit
CKEn-1 CKEn
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
H
X
X
H
H
X
X
X
X
X
H
H
X
L
L
L
L
CS RAS
H
H
X
H
H
H
X
L
L
L
L
L
L
L
L
L
L
L
L
L
L
8
(V = Valid, X = Don’t Care, H = Logic High, L = Logic Low)
H
X
H
H
X
H
H
H
X
X
H
X
V
X
H
X
X
L
L
L
L
L
CAS
H
H
H
H
H
H
V
H
H
X
L
L
L
X
L
L
X
X
X
X
X
WE
H
H
X
H
H
H
X
X
H
X
V
X
H
X
X
L
L
L
L
L
L
DQM
AMIC Technology, Corp.
X
X
X
X
X
X
X
X
X
X
X
X
V
X
X
X
L
BA A10
V
V
V
V
X
OP CODE
OP CODE
/AP
H
H
H
L
L
L
Row Addr.
X
X
X
X
X
X
X
X
X
A43E06321
Column
Column
A9~A0
Addr.
Addr.
X
Notes
1,2
1,2
4,5
4,5
4
4
4
6
8
3
3
3
3
7