at25df321 ATMEL Corporation, at25df321 Datasheet - Page 24

• Manufacturer Part Number: at25df321
• Description: At25df321 32-megabit 2.7-volt Only Serial Firmware Dataflash Memory
• Manufacturer: ATMEL Corporation

Table 11-1.
Table 11-2.
24
Data Type
Manufacturer ID
Device ID (Part 1)
Device ID (Part 2)
Byte No.
AT25DF321
1
2
3
4
Manufacturer and Device ID Information
Manufacturer and Device ID Details
Bit 7
0
0
0
Family Code
Data Type
Manufacturer ID
Device ID (Part 1)
Device ID (Part 2)
Extended Device Information String Length
Sub Code
Bit 6
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
0
1
0
SCK
SO
CS
Bit 5
SI
0
0
0
JEDEC Assigned Code
Note: Each transition
Bit 4
1
0
0
HIGH-IMPEDANCE
Bit 3
Product Version Code
0
1
0
0
OPCODE
Density Code
9Fh
Bit 2
1
1
0
6
7
shown for SI and SO represents one byte (8 bits)
MANUFACTURER ID
8
Bit 1
1
1
0
1Fh
Bit 0
14
1
1
0
15
16
Value
DEVICE ID
Hex
1Fh
47h
00h
BYTE 1
47h
22
Details
JEDEC Code:
Family Code:
Density Code:
Sub Code:
Product Version:
23
24
DEVICE ID
BYTE 2
00h
30
31
STRING LENGTH
32
0001 1111 (1Fh for Atmel)
010 (AT25/26DFxxx series)
00111 (32-Mbit)
000 (Standard series)
00000 (Initial version)
INFORMATION
EXTENDED
DEVICE
00h
3669A–DFLASH–07/07
38
Value
1Fh
47h
00h
00h