AT25DF641A-MH-T ATMEL [ATMEL Corporation], AT25DF641A-MH-T Datasheet - Page 34

• Manufacturer Part Number: AT25DF641A-MH-T
• Description: 64-Mbit 2.7V Minimum Serial Peripheral Interface Serial Flash Memory
• Manufacturer: ATMEL [ATMEL Corporation]

Table 11-1.
Notes:
34
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
Atmel AT25DF641A [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
At clock frequencies above f
not be valid. Therefore, if operating at clock frequencies above f
must be clocked out from the device in order to read the correct values of both bytes of the Sta-
tus Register.
Deasserting the CS pin will terminate the Read Status Register 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.
Name
CLK
Type
R/W
, the first two bytes of data output from the Status Register will
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
CLK
, at least four bytes of data
8693A–DFLASH–8/10