A43E06321 datasheet(21/46 Pages) AMICC

21 / 46 page

A43E06321

PRELIMINARY

(July, 2005, Version 0.0)

AMIC Technology, Corp.

12. About Burst Type Control

Sequential counting

At MRS A3=”0”. See the BURST SEQUENCE TABE.(BL=4,8)

BL=1,2,4,8 and full page wrap around.

Basic

MODE

Interleave counting

At MRS A3=” 1”. See the BURST SEQUENCE TABE.(BL=4,8)

BL=4,8 At BL=1,2 Interleave Counting = Sequential Counting

Random

MODE

Random column Access

tCCD = 1 CLK

Every cycle Read/Write Command with random column address can realize

Random Column Access.

That is similar to Extended Data Out (EDO) Operation of convention DRAM.

13. About Burst Length Control

At MRS A2,1,0 = “000”.

At auto precharge, tRAS should not be violated.

At MRS A2,1,0 = “001”.

At auto precharge, tRAS should not be violated.

At MRS A2,1,0 = “010”

Basic

MODE

At MRS A2,1,0 = “011”.

Special

MODE

BRSW

At MRS A9=”1”.

Read burst = 1,2,4,8, full page/write Burst =1

At auto precharge of write, tRAS should not be violated.

RAS Interrupt

(Interrupted by Precharge)

Before the end of burst, Row precharge command of the same bank

Stops read/write burst with Row precharge.

tRDL= 2 with DQM, valid DQ after burst stop is 1,2 for CL=2,3 respectively

During read/write burst with auto precharge, RAS interrupt cannot be issued.

Interrupt

MODE

CAS Interrupt

Before the end of burst, new read/write stops read/write burst and starts new

read/write burst or block write.

During read/write burst with auto precharge, CAS interrupt can not be issued.

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