MSM54V24632A 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM54V24632A

131,072-Word x 32-Bit x 2-Bank SGRAM without Graphics Functions

Oki Electric Industry 

¡ Semiconductor

MSM54V24632A

Mode Set Address Keys

Operation Code

A8 A7

TM

A6

0

0 Mode Setting 0

0

1 Reserved 0

1

0 Reserved 0

1

1 Reserved 0

1

1

1

1

CAS Latency

A5 A4

CL

0 0 Reserved

01

1

10

2

11

3

0 0 Reserved

0 1 Reserved

1 0 Reserved

1 1 Reserved

Burst Type

A3

BT

A2

0 Sequential 0

1 Interleave 0

0

0

1

1

1

1

Burst Length

A1 A0 BT = 0 BT = 1

00

1

1

01

2

2

10

4

4

11

8

8

0 0 Reserved Reserved

0 1 Reserved Reserved

1 0 Reserved Reserved

1 1 Full Page Reserved

Note: A9 should stay "L" during mode set cycle.

POWER ON SEQUENCE

1. With inputs in NOP state, turn on the power supply and start the system clock.

2. After the VCC voltage has reached the specified level, pause for 200 ms or more with

the input kept in NOP state.

3. Issue the precharge all bank command.

4. Apply an Auto-refresh eight or more times.

5. Enter the mode register setting command.

7

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