AT45DB021E datasheet(41/69 Pages) RENESAS

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DS-AT45DB021E-8789 Rev. N

Page 41

3/24/26

AT45DB021E Datasheet

17. Command Tables

Table 26. Read Commands

Command

Opcode

Main Memory Page Read

D2h

Continuous Array Read (Low Power Mode)

01h

Continuous Array Read (Low Frequency)

03h

Continuous Array Read (High Frequency)

0Bh

Continuous Array Read (Legacy Command – Not Recommended for New Designs)

E8h

Buffer Read (Low Frequency)

D1h

Buffer Read (High Frequency)

D4h

Table 27. Program and Erase Commands

Command

Opcode

Buffer Write

84h

Buffer to Main Memory Page Program with Built-In Erase

83h

Buffer to Main Memory Page Program without Built-In Erase

88h

Main Memory Page Program through Buffer with Built-In Erase

82h

Main Memory Byte/Page Program through Buffer without Built-In Erase

02h

Page Erase

81h

Block Erase

50h

Sector Erase

7Ch

Chip Erase

C7h + 94h + 80h + 9Ah

Read-Modify-Write through Buffer 1

58h

Table 28. Protection and Security Commands

Command

Opcode

Enable Sector Protection

3Dh + 2Ah + 7Fh + A9h

Disable Sector Protection

3Dh + 2Ah + 7Fh + 9Ah

Erase Sector Protection Register

3Dh + 2Ah + 7Fh + CFh

Program Sector Protection Register

3Dh + 2Ah + 7Fh + FCh

Read Sector Protection Register

32h

Sector Lockdown

3Dh + 2Ah + 7Fh + 30h

Read Sector Lockdown Register

35h

Freeze Sector Lockdown

34h + 55h + AAh + 40h

Program Security Register

9Bh + 00h + 00h + 00h

Read Security Register

77h

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