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Rev 3.1

July. 2004

K7R163684B

K7R161884B

STATE DIAGRAM

Notes: 1. Internal burst counter is fixed as 2-bit linear, i.e. when first address is A0+0, next internal burst address is A0+1.

2. "READ" refers to read active status with R=Low, "READ" refers to read inactive status with R=high. "WRITE" and "WRITE" are the same case.

3. Read and write state machine can be active simulateneously.

4. State machine control timing sequence is controlled by K.

READ

DDR READ

D count=D count+1

POWER-UP

WRITE NOP

LOAD NEW

READ ADDRESS

D count=0

ALWAYS

WRITE

ALWAYS

READ

WRITE

READ

D count=2

INCREMENT

READ ADDRESS

READ NOP

INCREMENT

WRITE ADDRESS

DDR WRITE

D count=D count+1

LOAD NEW

WRITE ADDRESS

D count=0

ALWAYS

READ

D count=1

READ

D count=2

ALWAYS

WRITE

D count=2

WRITE

D count=1

WRITE

D count=2