AT25DF081-MUN-T データシートの表示（PDF） - Atmel Corporation

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AT25DF081-MUN-T

8-megabit 1.65-volt Minimum SPI Serial Flash Memory

Atmel Corporation 

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.

Table 11-1. Manufacturer and Device ID Information

Byte No.

Data Type

1

Manufacturer ID

2

Device ID (Part 1)

3

Device ID (Part 2)

4

Extended Device Information String Length

Value

1Fh

45h

02h

00h

Table 11-2. Manufacturer and Device ID Details

Data Type

Manufacturer ID

Device ID (Part 1)

Device ID (Part 2)

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1

JEDEC Assigned Code

0

0

0

1

1

1

1

Family Code

Density Code

0

1

0

0

0

1

0

Sub Code

Product Version Code

0

0

0

0

0

0

1

Bit 0

1

1

0

Hex

Value

1Fh

47h

00h

Details

JEDEC Code:

Family Code:

Density Code:

Sub Code:

Product Version:

0001 1111 (1Fh for Atmel)

010 (AT25DF/26DFxxx series)

00101 (8-Mbit)

000 (Standard series)

00010

Figure 11-1. Read Manufacturer and Device ID

CS

SCK

SI

0

678

OPCODE

9Fh

14 15 16

22 23 24

30 31 32

38

SO

HIGH-IMPEDANCE

1Fh

45h

MANUFACTURER ID

DEVICE ID

BYTE 1

02h

DEVICE ID

BYTE 2

Note: Each transition

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

00h

EXTENDED

DEVICE

INFORMATION

STRING LENGTH

24 AT25DF081

3674E–DFLASH–8/08

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