19

3387L–DFLASH–6/06

AT45DB321C

Notes:

1. This command should be used for applications requiring a high number of random page writes within a sector. See “Auto

Page Rewrite” on page 8.

2. The Security Register Program command utilizes data stored in Buffer 1. Therefore, this command must be used in conjunc-

tion with the Buffer 1 write command. See “Security Register” on page 14 for details.

Table 9-3.

Additional Commands

Command

SCK Mode

Opcode

Main Memory Page to Buffer 1 Transfer

Mode 0, Mode 3

53H

Main Memory Page to Buffer 2 Transfer

Mode 0, Mode 3

55H

Main Memory Page to Buffer 1 Compare

Mode 0, Mode 3

60H

Main Memory Page to Buffer 2 Compare

Mode 0, Mode 3

61H

Auto Page Rewrite Through Buffer 1(1)

Mode 0, Mode 3

58H

Auto Page Rewrite Through Buffer 2(1)

Mode 0, Mode 3

59H

Security Register Program(2)

Mode 0, Mode 3

9AH

Security Register Read

Mode 0, Mode 3

77H