MB81F643242C-60FN View Datasheet(PDF) - Fujitsu

Part Name

Description

Manufacturer

MB81F643242C-60FN

MEMORY CMOS 4 × 512 K × 32 BIT SYNCHRONOUS DYNAMIC RAM

Fujitsu 

MB81F643242C-60/-70/-10 Advanced Info (AE0.1E)

Burst

Length

2

4

8

Starting Column

Address

A2 A1 A0

XX0

XX1

X00

X01

X10

X11

000

001

010

011

100

101

110

111

Sequential Mode

0–1

1–0

0–1–2–3

1–2–3–0

2–3–0–1

3–0–1–2

0–1–2–3–4–5–6–7

1–2–3–4–5–6–7–0

2–3–4–5–6–7–0–1

3–4–5–6–7–0–1–2

4–5–6–7–0–1–2–3

5–6–7–0–1–2–3–4

6–7–0–1–2–3–4–5

7–0–1–2–3–4–5–6

Interleave

0–1

1–0

0–1–2– 3

1–0–3–2

2–3–0–1

3–2–1–0

0–1–2–3–4–5–6–7

1–0–3–2–5–4–7–6

2–3–0–1–6–7–4–5

3–2–1–0–7–6–5–4

4–5–6–7–0–1–2–3

5–4–7–6–1–0–3–2

6–7–4–5–2–3–0–1

7–6–5–4–3–2–1–0

FULL COLUMN BURST AND BURST STOP COMMAND (BST)

The full column burst is an option of burst length and available only at sequential mode of burst type. This full column

burst mode is repeatedly access to the same column. If burst mode reaches end of column address, then it wraps

round to first column address (= 0) and continues to count until interrupted by the news read (READ) /write (WRIT),

precharge (PRE), or burst stop (BST) command. The selection of Auto-precharge option is illegal during the full

column burst operation except write command at BURST READ & SINGLE WRITE mode.

The BST command is applicable to terminate the burst operation. If the BST command is asserted during the burst

mode, its operation is terminated immediately and the internal state moves to Bank Active.

When read mode is interrupted by BST command, the output will be in High-Z.

For the detail rule, please refer to “TIMING DIAGRAM - 8” in section “s TIMING DIAGRAMS“.

When write mode is interrupted by BST command, the data to be applied at the same time with BST command will

be ignored.

BURST READ & SINGLE WRITE

The burst read and single write mode provides single word write operation regardless of its burst length. In this

mode, burst read operation does not be affected by this mode.

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