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5/21/01; v.1.1

Alliance Semiconductor

P. 16 of 29

AS4LC2M8S1

AS4LC1M16S1

DQM waveforms:

read (CL = 3, BL = 4)

DQM waveforms:

write (BL = 4)

Concurrent Auto-P Waveforms

According to Intel™’s specification, auto-p burst interruption is allowed by another burst provided that the interrupting burst is in a

different bank than the ongoing burst.

(A) RD-P interrupted by RD in another bank

(CL = 3, BL = 4)

(B) RD-P interrupted by WR in another bank

(CL = 3, BL = 8)

CLK

CMD

DQM

DQ(CL = 3)

DQ(CL = 2)

Read data

CLK

CMD

DQM

Write data

ignored

ignored

Data written

CLK

CMD

RD-P(A)

DQ

Bank A precharge starts

RD (B)

CLK

CMD

RD-P (A)

DQ

Bank A precharge starts

WR (B)

DQM