AT45DB041D-SU SL383 Atmel, AT45DB041D-SU SL383 Datasheet - Page 14

• Manufacturer Part Number: AT45DB041D-SU SL383
• Manufacturer: Atmel

Specifications of AT45DB041D-SU SL383

• Density: 4Mb
• Access Time (max): 6ns
• Interface Type: Serial (SPI)
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: SOIC EIAJ
• Program/erase Volt (typ): 2.7 to 3.6V
• Sync/async: Synchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Supply Current: 15mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Compliant

9.1
14
Sector Protection Register
AT45DB041D
The nonvolatile Sector Protection Register specifies which sectors are to be protected or unpro-
tected with either the software or hardware controlled protection methods. The Sector Protection
Register contains 8 bytes of data, of which byte locations 0 through 7 contain values that specify
whether sectors 0 through 7 will be protected or unprotected. The Sector Protection Register is
user modifiable and must first be erased before it can be reprogrammed.
format of the Sector Protection Register.:
Table 9-2.
Table 9-3.
Note:
Sector Number
Protected
Unprotected
Sectors 0a, 0b Unprotected
Protect Sector 0a
Protect Sector 0b (Page 8-255)
Protect Sectors 0a (Page 0-7), 0b
(Page 8-255)
1. The default value for bytes 0 through 7 when shipped from Atmel
x = don’t care.
(1)
Sector Protection Register
Sector 0 (0a, 0b)
(Page 0-7)
Bit 7, 6
0a
00
11
00
11
See
0 (0a, 0b)
Table 9-3
(Page 8-255)
Bit 5, 4
0b
00
00
11
11
Bit 3, 2
xx
xx
xx
xx
®
is 00H.
Table 9-3
Bit 1, 0
3595P–DFLASH–09/09
1 to 7
xx
xx
xx
xx
FFH
00H
illustrates the
Value
Data
CxH
FxH
0xH
3xH