FEDD56V62160E-01
OKI Semiconductor
MD56V62160E
Mode Set Address Keys
Single Write
CAS Latency
Burst Type
BT
Burst Length
A9
0
BRSW
Normal
A6 A5 A4
CL
A3
0
A2 A1 A0
BT = 0
BT = 1
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
1
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
2
3
Reserved
Reserved
Reserved
Reserved
Reserved Reserved
Reserved Reserved
Reserved Reserved
Full Page Reserved
Notes: A7, A8, A10, A11, A12 and A13 should stay “L” during mode set cycle.
MD56V62160E supports two methods of Power on Sequence.
POWER ON SEQUENCE 1
1. With inputs in NOP state, 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 CBR auto-refresh eight or more times.
5. Enter the mode register setting command.
POWER ON SEQUENCE 2
1. With inputs in NOP state, 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 CBR auto-refresh eight or more times.
7/34
OKI [ OKI ELECTRONIC COMPONETS ]
