AT25DF081A-MH-T Atmel, AT25DF081A-MH-T Datasheet - Page 32

• Manufacturer Part Number: AT25DF081A-MH-T
• Description: IC FLASH 8MBIT SPI 8UDFN
• Manufacturer: Atmel

Specifications of AT25DF081A-MH-T

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 8M (4096 pages x 256 bytes)
• Speed: 100MHz
• Interface: SPI, RapidS
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-UDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Table 11-2.
Notes:
11.1.1 SPRL Bit
11.1.2 EPE Bit
32
Bit
7
6
5
4
3
2
1
0
(1)
1. Only bits 4 and 3 of Status Register Byte 2 will be modified when using the Write Status Register Byte 2 command.
2. R/W = Readable and writeable
The SPRL bit is used to control whether the Sector Protection Registers can be modified or not. When the SPRL
bit is in the logical “1” state, all Sector Protection Registers are locked and cannot be modified with the Protect Sec-
tor and Unprotect Sector commands (the device will ignore these commands). In addition, the Global Protect and
Global Unprotect features cannot be performed. Any sectors that are presently protected will remain protected, and
any sectors that are presently unprotected will remain unprotected.
When the SPRL bit is in the logical “0” state, all Sector Protection Registers are unlocked and can be modified (the
Protect Sector and Unprotect Sector commands, as well as the Global Protect and Global Unprotect features, will
be processed as normal). The SPRL bit defaults to the logical “0” state after device power-up. The Reset command
has no effect on the SPRL bit.
The SPRL bit can be modified freely whenever the WP pin is deasserted. However, if the WP pin is asserted, then
the SPRL bit may only be changed from a logical “0” (Sector Protection Registers are unlocked) to a logical “1”
(Sector Protection Registers are locked). In order to reset the SPRL bit back to a logical “0” using the Write Status
Register Byte 1 command, the WP pin will have to first be deasserted.
The SPRL bit is the only bit of Status Register Byte 1 that can be user modified via the Write Status Register Byte
1 command.
The EPE bit indicates whether the last erase or program operation completed successfully or not. If at least one
byte during the erase or program operation did not erase or program properly, then the EPE bit will be set to the
logical “1” state. The EPE bit will not be set if an erase or program operation aborts for any reason such as an
attempt to erase or program a protected region or a locked down sector or if the WEL bit is not set prior to an erase
or program operation. The EPE bit will be updated after every erase and program operation.
RDY/BSY
Atmel AT25DF081A
RSTE
RES
RES
RES
RES
RES
R = Readable only
SLE
Status Register Format – Byte 2
Reserved for future use
Reserved for future use
Reserved for future use
Reset Enabled
Sector Lockdown Enabled
Reserved for future use
Reserved for future use
Ready/Busy Status
Name
Type
R/W
R/W
R
R
R
R
R
R
(2)
0
0
0
0
1
0
1
0
0
0
1
Reserved for future use
Reserved for future use
Reserved for future use
Reset command is disabled (default)
Reset command is enabled
Sector Lockdown and Freeze Sector Lockdown State
commands are disabled (default)
Sector Lockdown and Freeze Sector Lockdown State
commands are enabled
Reserved for future use
Reserved for future use
Device is ready
Device is busy with an internal operation
Description
8715B–SFLSH–8/10