at25df321a ATMEL Corporation, at25df321a Datasheet - Page 36

• Manufacturer Part Number: at25df321a
• Description: 32-megabit 2.7-volt Minimum Spi Serial Flash Memory
• Manufacturer: ATMEL Corporation

Table 11-1.
Notes:
36
Bit
3:2
7
6
5
4
1
0
(1)
1. Only bit 7 of Status Register Byte 1 will be modified when using the Write Status Register Byte 1 command.
2. R/W = Readable and writeable
RDY/BSY
AT25DF321A [Preliminary]
SPRL
WPP
SWP
WEL
RES
EPE
R = Readable only
Status Register Format – Byte 1
Sector Protection Registers Locked
Reserved for future use
Erase/Program Error
Write Protect (WP) Pin Status
Software Protection Status
Write Enable Latch Status
Ready/Busy Status
Name
Type
R/W
R
R
R
R
R
R
(2)
00
01
10
11
0
1
0
0
1
0
1
0
1
0
1
Sector Protection Registers are unlocked (default).
Sector Protection Registers are locked.
Reserved for future use.
Erase or program operation was successful.
Erase or program error detected.
WP is asserted.
WP is deasserted.
All sectors are software unprotected (all Sector
Protection Registers are 0).
Some sectors are software protected. Read
individual Sector Protection Registers to determine
which sectors are protected.
Reserved for future use.
All sectors are software protected (all Sector
Protection Registers are 1 – default).
Device is not write enabled (default).
Device is write enabled.
Device is ready.
Device is busy with an internal operation.
Description
3686C–DFLASH–12/08