AT26DF321-S3U ATMEL [ATMEL Corporation], AT26DF321-S3U Datasheet - Page 23

• Manufacturer Part Number: AT26DF321-S3U
• Description: 32-megabit 2.7-volt Only Serial Firmware DataFlash Memory
• Manufacturer: ATMEL [ATMEL Corporation]

Table 11-2.
11.2
3633C–DFLASH–08/06
Data Type
Manufacturer ID
Device ID (Part 1)
Device ID (Part 2)
Deep Power-Down
Manufacturer and Device ID Details
Bit 7
0
0
0
Family Code
MLC Code
Bit 6
Figure 11-1. Read Manufacturer and Device ID
During normal operation, the device will be placed in the standby mode to consume less power
as long as the CS pin remains deasserted and no internal operation is in progress. The Deep
Power-Down command offers the ability to place the device into an even lower power consump-
tion state called the Deep Power-Down mode.
When the device is in the Deep Power-Down mode, all commands including the Read Status
Register command will be ignored with the exception of the Resume from Deep Power-Down
command. Since all commands will be ignored, the mode can be used as an extra protection
mechanism against program and erase operations.
Entering the Deep Power-Down mode is accomplished by simply asserting the CS pin, clocking
in the opcode of B9h, and then deasserting the CS pin. Any additional data clocked into the
device after the opcode will be ignored. When the CS pin is deasserted, the device will enter the
Deep Power-Down mode within the maximum time of t
The complete opcode must be clocked in before the CS pin is deasserted; otherwise, the device
will abort the operation and return to the standby mode once the CS pin is deasserted. In addi-
tion, the device will default to the standby mode after a power-cycle or a device reset.
The Deep Power-Down command will be ignored if an internally self-timed operation such as a
program or erase cycle is in progress. The Deep Power-Down command must be reissued after
the internally self-timed operation has been completed in order for the device to enter the Deep
Power-Down mode.
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
AT26DF321 [Preliminary]
Value
DEVICE ID
Hex
1Fh
47h
00h
BYTE 1
46h
22
EDPD
Details
JEDEC Code:
Family Code:
Density Code:
MLC Code:
Product Version:
23
.
24
DEVICE ID
BYTE 2
00h
30
31
STRING LENGTH
32
0001 1111 (1Fh for Atmel)
010 (AT26DFxxx series)
00111 (32-Mbit)
000 (1-bit/cell technology)
00000 (Initial version)
INFORMATION
EXTENDED
DEVICE
00h
38
23