AT45DB642D-TU datasheet(27/55 Pages) ATMEL

Part #	AT45DB642D-TU

Description	64-megabit 2.7-volt Dual-interface DataFlash

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Manufacturer	ATMEL [ATMEL Corporation]

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27

3542F–DFLASH–09/06

AT45DB642D

14.2

Operation Mode Summary

The commands described previously can be grouped into four different categories to better

describe which commands can be executed at what times.

Group A commands consist of:

1.

Main Memory Page Read

2.

Continuous Array Read

3.

Read Sector Protection Register

4.

Read Sector Lockdown Register

5.

Read Security Register

Group B commands consist of:

1.

Page Erase

2.

Block Erase

3.

Sector Erase

4.

Chip Erase

5.

Main Memory Page to Buffer 1 (or 2) Transfer

6.

Main Memory Page to Buffer 1 (or 2) Compare

7.

Buffer 1 (or 2) to Main Memory Page Program with Built-in Erase

8.

Buffer 1 (or 2) to Main Memory Page Program without Built-in Erase

9.

Main Memory Page Program through Buffer 1 (or 2)

10. Auto Page Rewrite

Group C commands consist of:

1.

Buffer 1 (or 2) Read

2.

Buffer 1 (or 2) Write

3.

Status Register Read

4.

Manufacturer and Device ID Read

Group D commands consist of:

1.

Erase Sector Protection Register

2.

Program Sector Protection Register

3.

Sector Lockdown

4.

Program Security Register

If a Group A command is in progress (not fully completed), then another command in Group A,

B, C, or D should not be started. However, during the internally self-timed portion of Group B

commands, any command in Group C can be executed. The Group B commands using buffer 1

should use Group C commands using buffer 2 and vice versa. Finally, during the internally self-

timed portion of a Group D command, only the Status Register Read command should be

executed.

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