AT45DB321C-CI(2004) View Datasheet(PDF) - Atmel Corporation
Part Name
Description
MFG CO.
AT45DB321C-CI Datasheet PDF : 37 Pages
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Table 1. Read Commands
Command
SCK Mode
Opcode
RapidS Mode 0 or 3
E8H
Continuous Array Read
Inactive Clock Polarity Low or High
68H
Main Memory Page Read
RapidS Mode 0 or 3
Inactive Clock Polarity Low or High
D2H
52H
Buffer 1 Read
RapidS Mode 0 or 3
Inactive Clock Polarity Low or High
D4H
54H
Buffer 2 Read
RapidS Mode 0 or 3
Inactive Clock Polarity Low or High
D6H
56H
Status Register Read
RapidS Mode 0 or 3
Inactive Clock Polarity Low or High
D7H
57H
Manufacturer and Device ID
RapidS Mode 0 or 3
9FH
Note: 1. Legacy Opcodes 52H, 54H, 56H, 57H, and 68H are still supported for reasons of backward compatibility only and are not
recommended for new designs. The inactive clock polarity high or low modes will not be supported in the future products.
Table 2. Program and Erase Commands
Command
SCK Mode
Opcode
Buffer 1 Write
Mode 0, Mode 3
84H
Buffer 2 Write
Mode 0, Mode 3
87H
Buffer 1 to Main Memory Page Program with Built-in Erase
Mode 0, Mode 3
83H
Buffer 2 to Main Memory Page Program with Built-in Erase
Mode 0, Mode 3
86H
Buffer 1 to Main Memory Page Program without Built-in Erase
Mode 0, Mode 3
88H
Buffer 2 to Main Memory Page Program without Built-in Erase
Mode 0, Mode 3
89H
Page Erase
Mode 0, Mode 3
81H
Block Erase
Mode 0, Mode 3
50H
Main Memory Page Program Through Buffer 1
Mode 0, Mode 3
82H
Main Memory Page Program Through Buffer 2
Mode 0, Mode 3
85H
Table 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
Auto Page Rewrite Through Buffer 1(1)
Auto Page Rewrite Through Buffer 2(1)
Security Register Program(2)
Mode 0, Mode 3
55H
Mode 0, Mode 3
58H
Mode 0, Mode 3
59H
Mode 0, Mode 3
9AH
Security Register Read
Mode 0, Mode 3
77H
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 6.
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 the Security Register description on page 12 for details.
16 AT45DB321C [Preliminary]
3387B–DFLSH–9/04
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