AT25DF321 datasheet(24/37 Pages) ATMEL

24 / 37 page

3669A–DFLASH–07/07

AT25DF321

Deasserting the CS pin will terminate the Manufacturer and Device ID read operation and put

the SO pin into a high-impedance state. The CS pin can be deasserted at any time and does not

require that a full byte of data be read.

Figure 11-1. Read Manufacturer and Device ID

Table 11-1.

Manufacturer and Device ID Information

Byte No.

Data Type

Value

Manufacturer ID

1Fh

Device ID (Part 1)

47h

Device ID (Part 2)

00h

Extended Device Information String Length

00h

Table 11-2.

Manufacturer and Device ID Details

Data Type

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Hex

Value

Details

Manufacturer ID

JEDEC Assigned Code

1Fh

JEDEC Code:

0001 1111 (1Fh for Atmel)

011

111

Device ID (Part 1)

Family Code

Density Code

47h

Family Code:

Density Code:

010 (AT25/26DFxxx series)

00111 (32-Mbit)

000

111

Device ID (Part 2)

Sub Code

Product Version Code

00h

Sub Code:

Product Version:

000 (Standard series)

00000 (Initial version)

000

SCK

9Fh

OPCODE

1Fh

47h

00h

MANUFACTURER ID

DEVICE ID

BYTE 1

DEVICE ID

BYTE 2

EXTENDED

DEVICE

INFORMATION

STRING LENGTH

HIGH-IMPEDANCE

Note: Each transition

shown for SI and SO represents one byte (8 bits)

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