W97AH6KB datasheet(77/127 Pages) WINBOND

77 / 127 page

W97AH6KB / W97AH2KB

Publication Release Date: May 15, 2014

Revision: A01-001

- 77 -

7.5.4

Current State Bank n - Command to Bank m Truth Table

Current State of

Bank n

Command

for

Bank m

Operation

Next State for

Bank m

Notes

Any

NOP

Continue previous operation

Current State of Bank m

Idle

Any

Any command allowed to Bank m

Row Activating,

Active, or

Precharging

Activate

Select and activate row in Bank m

Active

Read

Select column, and start read burst from Bank m

Reading

Write

Select column, and start write burst to Bank m

Writing

Precharge

Deactivate row in bank or banks

Precharging

MRR

Read value from Mode Register

Idle MR Reading or

Active MR Readin

10, 11,

BST

Read or Write burst terminate an ongoing

Read/Write from/to Bank m

Active

Reading

(Autoprecharge

disabled)

Read

Select column, and start read burst from Bank m

Reading

Write

Select column, and start write burst to Bank m

Writing

8, 14

Activate

Select and activate row in Bank m

Active

Precharge

Deactivate row in bank or banks

Precharging

Writing

(Autoprecharge

disabled)

Read

Select column, and start read burst from Bank m

Reading

8, 16

Write

Select column, and start write burst to Bank m

Writing

Activate

Select and activate row in Bank m

Active

Precharge

Deactivate row in bank or banks

Precharging

Reading with

Autoprecharge

Read

Select column, and start read burst from Bank m

Reading

8, 15

Write

Select column, and start write burst to Bank m

Writing

8, 14, 15

Activate

Select and activate row in Bank m

Active

Precharge

Deactivate row in bank or banks

Precharging

Writing with

Autoprecharge

Read

Select column, and start read burst from Bank m

Reading

8, 15, 16

Write

Select column, and start write burst to Bank m

Writing

8, 15

Activate

Select and activate row in Bank m

Active

Precharge

Deactivate row in bank or banks

Precharging

Power On

Reset

Begin Device Auto-Initialization

Resetting

12, 17

Resetting

MRR

Read value from Mode Register

Resetting MR Reading

Notes:

The table applies when both CKEn-1 and CKEn are HIGH, and after tXSR or tXP has been met if the previous state was Self Refresh or Power

Down.

All states and sequences not shown are illegal or reserved.

Current State Definitions:

Idle: the bank has been precharged, and tRP has been met.

Active: a row in the bank has been activated, and tRCD has been met. No data bursts/accesses and no register accesses are in progress.

Reading: a Read burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been terminated.

Writing: a Write burst has been initiated, with Auto Precharge disabled, and has not yet terminated or been terminated.

W97AH6KB Datasheet(PDF) 77 Page - Winbond

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