AT25DF641-MWH-Y Atmel, AT25DF641-MWH-Y Datasheet - Page 25

• Manufacturer Part Number: AT25DF641-MWH-Y
• Description: IC FLASH 64MBIT 100MHZ 8VDFN
• Manufacturer: Atmel

Specifications of AT25DF641-MWH-Y

• Format - Memory: FLASH
• Memory Type: DataFLASH
• Memory Size: 64M (32K pages x 256 bytes)
• Speed: 100MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-VDFN
• Architecture: Sectored
• Interface Type: SPI Serial
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Maximum Operating Current: 19 mA
• Mounting Style: SMD/SMT
• Organization: 64 KB x 128
• Cell Type: NOR
• Density: 64Mb
• Access Time (max): 5ns
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Package Type: VDFN
• Sync/async: Synchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Supply Current: 19mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3680F–DFLASH–4/10
Table 8-2.
Essentially, if the SPRL bit of the Status Register is in the logical “0” state (Sector Protection Registers are not
locked), then writing a 00h to the first byte of the Status Register will perform a Global Unprotect without changing
the state of the SPRL bit. Similarly, writing a 7Fh to the first byte of the Status Register will perform a Global
Protect and keep the SPRL bit in the logical “0” state. The SPRL bit can, of course, be changed to a logical “1” by
writing an FFh if software-locking or hardware-locking is desired along with the Global Protect.
State
WP
0
0
1
1
Current
SPRL
Value
0
1
0
1
Valid SPRL and Global Protect/Unprotect Conditions
New Write Status
Register Byte 1
7 6 5 4 3 2 1 0
0 x 0 0 0 0 x x
0 x 0 0 0 1 x x
0 x 1 1 1 0 x x
0 x 1 1 1 1 x x
1 x 0 0 0 0 x x
1 x 0 0 0 1 x x
1 x 1 1 1 0 x x
1 x 1 1 1 1 x x
0 x 0 0 0 0 x x
0 x 0 0 0 1 x x
0 x 1 1 1 0 x x
0 x 1 1 1 1 x x
1 x 0 0 0 0 x x
1 x 0 0 0 1 x x
1 x 1 1 1 0 x x
1 x 1 1 1 1 x x
0 x 0 0 0 0 x x
0 x 0 0 0 1 x x
0 x 1 1 1 0 x x
0 x 1 1 1 1 x x
1 x 0 0 0 0 x x
1 x 0 0 0 1 x x
1 x 1 1 1 0 x x
1 x 1 1 1 1 x x
x x x x x x x x
Data
Bit
↕
↕
↕
↕
↕
↕
Protection Operation
Global Unprotect – all Sector Protection Registers reset to 0
No change to current protection.
No change to current protection.
No change to current protection.
Global Protect – all Sector Protection Registers set to 1
Global Unprotect – all Sector Protection Registers reset to 0
No change to current protection.
No change to current protection.
No change to current protection.
Global Protect – all Sector Protection Registers set to 1
No change to the current protection level. All sectors currently protected will remain protected
and all sectors currently unprotected will remain unprotected.
The Sector Protection Registers are hard-locked and cannot be changed when the
LOW and the current state of SPRL is 1. Therefore, a Global Protect/Unprotect will not occur.
In addition, the SPRL bit cannot be changed (the
SPRL back to a 0).
Global Unprotect – all Sector Protection Registers reset to 0
No change to current protection.
No change to current protection.
No change to current protection.
Global Protect – all Sector Protection Registers set to 1
Global Unprotect – all Sector Protection Registers reset to 0
No change to current protection.
No change to current protection.
No change to current protection.
Global Protect – all Sector Protection Registers set to 1
No change to the current protection level. All sectors currently
protected will remain protected, and all sectors currently
unprotected will remain unprotected.
The Sector Protection Registers are soft-locked and cannot be
changed when the current state of SPRL is 1. Therefore, a Global
Protect/Unprotect will not occur. However, the SPRL bit can be
changed back to a 0 from a 1 since the
perform a Global Protect/Unprotect, the Write Status Register
command must be issued again after the SPRL bit has been
changed from a 1 to a 0.
WP
pin is HIGH. To
WP
Atmel AT25DF641
pin must be HIGH in order to change
0
0
0
0
0
1
1
1
1
1
0
0
0
0
0
1
1
1
1
1
WP
SPRL
Value
New
pin is
0
0
0
0
0
1
1
1
1
1
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