EMD28164PA Emlsi Inc., EMD28164PA Datasheet - Page 30

• Manufacturer Part Number: EMD28164PA
• Description: 128m 8m X 16 Mobile Ddr Sdram
• Manufacturer: Emlsi Inc.

Table 21: SIMPLIFIED TRUTH TABLE
(V=Valid, X =Don't care, H=Logic High, L=Logic Low)
NOTE :
1. OP Code : Operand Code
2. EMRS/MRS can be issued only at all banks precharge state.
3. Auto refresh functions are the same as CBR refresh of DRAM.
4. BA0 ~BA1 : Bank select addresses.
5. If A10/AP is “High” at row precharge, BA0 and BA1 are ignored and all banks are selected.
6. During burst write with auto precharge, new read/write command can not be issued.
7. Burst stop command is valid at every burst length.
8. DM sampled at the rising and falling edges of the DQS and Data-in are masked at the both edges(Write DM latency is 0).
9. This combination is not defined for any function, which means “No Operation(NOP)” in DDR SDRAM.
10. The Deep Power Down Mode is exited by asserting CKE high and full initialization is required after exiting Deep Power Down Mode.
Register
Refresh
Bank Active & Row Addr.
Read &
Column
Address
Write &
Column
Address
Burst Stop
Precharge
Active Power Down
Precharge
Power Down
Deep Power Down
DM
No Operation Command(NOP)
A0 ~ A11 & BA0 ~ BA1 : Program keys. (@EMRS/MRS)
A new command can be issued 2 CLK cycles after EMRS or MRS.
Auto/self refresh can be issued only at all banks precharge state.
Another bank read/write command can be issued after the end of burst.
New row active of the associated bank can be issued at t
COMMAND
Mode Register Set
Auto Refresh
Self
Refresh
Auto Precharge Disable
Auto Precharge Enable
Auto Precharge Disable
Auto Precharge Enable
Bank Selection
All Banks
Entry
Entry
Entry
Entry
Exit
Exit
Exit
Exit
CKEn-1
H
H
H
H
H
H
H
H
H
H
H
H
L
L
L
L
CKEn
H
H
H
H
H
RP
X
X
X
X
X
X
X
L
L
L
L
after the end of burst.
/CS
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
30
/RAS
X
H
H
H
H
H
H
H
H
H
H
L
L
X
L
L
X
X
X
X
X
X
/CAS
H
H
X
H
H
X
H
X
H
X
H
X
H
H
X
X
H
L
L
L
L
/WE
128M: 8M x 16 Mobile DDR SDRAM
H
H
X
H
H
X
H
X
H
X
H
X
H
X
X
H
L
L
L
L
L
BA0,1
V
V
V
V
X
X
EMD28164PA
A10/AP
OP CODE
H
H
H
L
L
L
X
X
Row Address
X
X
X
X
X
A9 ~ A0
Address
(A0~A8)
Address
(A0~A8)
Column
Column
A11,
X
Rev 1.0
Note
1, 2
4, 6
10
3
3
3
3
4
4
4
7
5
8
9
9