MT46V16M8TG-8 Просмотр технического описания (PDF) - Micron Technology

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MT46V16M8TG-8

DOUBLE DATA RATE (DDR) SDRAM

Micron Technology 

PRELIMINARY

128Mb: x4, x8, x16

DDR SDRAM

TRUTH TABLE 4 – CURRENT STATE BANK n – COMMAND TO BANK m

(Notes: 1-6; notes appear below and on next page)

CURRENT STATE CS# RAS# CAS# WE#

Any

HXXX

L HHH

Idle

XXXX

Row

L L HH

Activating,

LHLH

Active, or

LHL L

Precharging L L H L

Read

L L HH

(Auto-

LHLH

Precharge

LHL L

Disabled)

L LHL

Write

L L HH

(Auto-

LHLH

Precharge

LHL L

Disabled)

L LHL

Read

L L HH

(With Auto- L H L H

Precharge)

LHL L

L LHL

Write

L L HH

(With Auto- L H L H

Precharge)

LHL L

L LHL

COMMAND/ACTION

DESELECT (NOP/continue previous operation)

NO OPERATION (NOP/continue previous operation)

Any Command Otherwise Allowed to Bank m

ACTIVE (select and activate row)

READ (select column and start READ burst)

WRITE (select column and start WRITE burst)

PRECHARGE

ACTIVE (select and activate row)

READ (select column and start new READ burst)

WRITE (select column and start WRITE burst)

PRECHARGE

ACTIVE (select and activate row)

READ (select column and start READ burst)

WRITE (select column and start new WRITE burst)

PRECHARGE

ACTIVE (select and activate row)

READ (select column and start new READ burst)

WRITE (select column and start WRITE burst)

PRECHARGE

ACTIVE (select and activate row)

READ (select column and start READ burst)

WRITE (select column and start new WRITE burst)

PRECHARGE

NOTES

7

7

7

7, 9

7,8

7

7, 3a

7, 9, 3a

7, 3a

7, 3a

NOTE:

1. This table applies when CKEn-1 was HIGH and CKEn is HIGH (see Truth Table 2) and after tXSNR has been

met (if the previous state was self refresh).

2. This table describes alternate bank operation, except where noted (i.e., the current state is for bank n and

the commands shown are those allowed to be issued to bank m, assuming that bank m is in such a state

that the given command is allowable). Exceptions are covered in the notes below.

(Notes continue on next page)

128Mb: x4, x8, x16 DDR SDRAM

128Mx4x8x16DDR_C.p65 – Rev. C; Pub. 4/01

41

Micron Technology, Inc., reserves the right to change products or specifications without notice.

©2001, Micron Technology, Inc.

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