PEDD56V62320K-01
OKI Semiconductor
MD56V62320K
Mode Set Address Keys
Write Mode
CAS Latency
A6 A5 A4
Burst Type
BT
Burst Length
A2 A1 A0 BT = 0
A9
0
WM
CL
A3
0
BT = 1
Normal
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Reserved
Reserved
2
Sequential
Interleave
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1
2
4
8
1
2
4
8
1
Single Write
1
3
Reserved
Reserved
Reserved
Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Full Page Reserved
Notes: A7, A8, A10, BA0 and BA1 should stay “L” during mode set cycle.
MD56V62320K supports two methods of Power on Sequence.
POWER ON SEQUENCE 1
1. With inputs in NOP state and CKE=High, turn on the power supply and start the system clock.
2. After the V voltage has reached the specified level, pause for 200 µs or more with the input kept in
CC
NOP state.
3. Issue the precharge all bank command.
4. Apply a auto-refresh eight or more times.
5. Enter the mode register setting command.
POWER ON SEQUENCE 2
1. With inputs in NOP state and CKE=High, turn on the power supply and start the system clock.
2. After the V voltage has reached the specified level, pause for 200 µs or more with the input kept in
CC
NOP state.
3. Issue the precharge all bank command.
4. Enter the mode register setting command.
5. Apply a auto-refresh eight or more times.
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