10

AT45DB041B

1938F–DFLSH–10/02

Note:

In Tables 2 and 3, an SCK mode designation of “Any” denotes any one of the four modes of operation (Inactive Clock Polarity

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

Table 1. Read Commands

Command

SCK Mode

Opcode

Continuous Array Read

Inactive Clock Polarity Low or High

68H

SPI Mode 0 or 3

E8H

Main Memory Page Read

Inactive Clock Polarity Low or High

52H

SPI Mode 0 or 3

D2H

Buffer 1 Read

Inactive Clock Polarity Low or High

54H

SPI Mode 0 or 3

D4H

Buffer 2 Read

Inactive Clock Polarity Low or High

56H

SPI Mode 0 or 3

D6H

Status Register Read

Inactive Clock Polarity Low or High

57H

SPI Mode 0 or 3

D7H

Table 2. Program and Erase Commands

Command

SCK Mode

Opcode

Buffer 1 Write

Any

84H

Buffer 2 Write

Any

87H

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

Any

83H

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

Any

86H

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

Any

88H

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

Any

89H

Page Erase

Any

81H

Block Erase

Any

50H

Main Memory Page Program through Buffer 1

Any

82H

Main Memory Page Program through Buffer 2

Any

85H

Table 3. Additional Commands

Command

SCK Mode

Opcode

Main Memory Page to Buffer 1 Transfer

Any

53H

Main Memory Page to Buffer 2 Transfer

Any

55H

Main Memory Page to Buffer 1 Compare

Any

60H

Main Memory Page to Buffer 2 Compare

Any

61H

Auto Page Rewrite through Buffer 1

Any

58H

Auto Page Rewrite through Buffer 2

Any

59H