45DB041B Datasheet, PDF(10/33 Page) ATMEL Corporation – 4-megabit 2.5-volt Only or 2.7-volt Only DataFlash

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45DB041B Datasheet, PDF (10/33 Pages) ATMEL Corporation – 4-megabit 2.5-volt Only or 2.7-volt Only DataFlash

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Table 1. Read Commands

Command

Continuous Array Read

Main Memory Page Read

Buffer 1 Read

Buffer 2 Read

Status Register Read

SCK Mode

Inactive Clock Polarity Low or High

SPI Mode 0 or 3

Inactive Clock Polarity Low or High

SPI Mode 0 or 3

Inactive Clock Polarity Low or High

SPI Mode 0 or 3

Inactive Clock Polarity Low or High

SPI Mode 0 or 3

Inactive Clock Polarity Low or High

SPI Mode 0 or 3

Opcode

68H

E8H

52H

D2H

54H

D4H

56H

D6H

57H

D7H

Table 2. Program and Erase Commands

Command

Buffer 1 Write

Buffer 2 Write

Buffer 1 to Main Memory Page Program with Built-in Erase

Buffer 2 to Main Memory Page Program with Built-in Erase

Buffer 1 to Main Memory Page Program without Built-in Erase

Buffer 2 to Main Memory Page Program without Built-in Erase

Page Erase

Block Erase

Main Memory Page Program through Buffer 1

Main Memory Page Program through Buffer 2

SCK Mode

Any

Any

Any

Any

Any

Any

Any

Any

Any

Any

Opcode

84H

87H

83H

86H

88H

89H

81H

50H

82H

85H

Table 3. Additional Commands

Command

Main Memory Page to Buffer 1 Transfer

Main Memory Page to Buffer 2 Transfer

Main Memory Page to Buffer 1 Compare

Main Memory Page to Buffer 2 Compare

Auto Page Rewrite through Buffer 1

Auto Page Rewrite through Buffer 2

SCK Mode

Any

Any

Any

Any

Any

Any

Opcode

53H

55H

60H

61H

58H

59H

Note: In Tables 2 and 3, an SCK mode designation of âAnyâ denotes any one of the four modes of operation (Inactive Clock Polarity

Low, Inactive Clock Polarity High, SPI Mode 0, or SPI Mode 3).

10 AT45DB041B

1938FâDFLSHâ10/02

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