®

16

ALLIANCE SEMICONDUCTOR

7/5/00

AS4LC4M16S0

AS4LC16M4S0

write interrupted by write (BL = 4)

write interrupted by read (CL = 2, BL = 4)

read interrupted by write (CL = 3, BL = 4)

Burst termination

Burst operations may be terminated with a Read, Write, Burst Stop, or Precharge command. When Burst Stop is asserted

during the read cycle, burst read data is terminated and the data bus goes to High Z after CAS latency. When Burst Stop is

asserted during the write cycle, burst write data is terminated and the databus goes to High Z simultaneously.

Burst stop command waveform, read cycle

(BL = 8)

CLK

CMD

ADD

DQ

Write data

Write data

CLK

CMD

ADD

DQ (CL2)

DQ (CL3)

Write data

Read data

AB

CLK

CMD

DQM

DQ

Read data

Write data*

CLK

CMD

DQ (CL = 2)

DQ (CL = 3)

Read data

Burst stop

Read data