AT45DB321D-SU SL383 Atmel, AT45DB321D-SU SL383 Datasheet - Page 14

• Manufacturer Part Number: AT45DB321D-SU SL383
• Manufacturer: Atmel

Specifications of AT45DB321D-SU SL383

• Density: 32Mb
• Access Time (max): 6ns
• Interface Type: Serial (SPI)
• Boot Type: Not Required
• Address Bus: 1b
• Operating Supply Voltage (typ): 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
• Word Size: 8b
• Number Of Words: 4M
• Supply Current: 15mA
• Mounting: Surface Mount
• Pin Count: 8
• Lead Free Status / RoHS Status: Compliant

9.1
14
Sector Protection Register
AT45DB321D
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 64 bytes of data, of which byte locations 0 through 63 contain values that
specify whether sectors 0 through 63 will be protected or unprotected. The Sector Protection
Register is user modifiable and must first be erased before it can be reprogrammed.
illustrates the format of the Sector Protection Register.:
Table 9-2.
Table 9-3.
Note:
Sector Number
Protected
Unprotected
Sectors 0a, 0b Unprotected
Protect Sector 0a (Pages 0-7)
Protect Sector 0b (Pages 8-127)
Protect Sectors 0a (Pages 0-7), 0b
(Pages 8-127)
1. The default value for bytes 0 through 63 when shipped from Atmel is 00H.
x = don’t care.
(1)
Sector Protection Register
Sector 0 (0a, 0b)
(Pages 0-7)
Bit 7, 6
0a
00
11
00
11
See
0 (0a, 0b)
Table 9-3
(Pages 8-127)
Bit 5, 4
0b
00
00
11
11
Bit 3, 2
xx
xx
xx
xx
Bit 1, 0
1 to 63
3597M–DFLASH–3/09
xx
xx
xx
xx
FFH
00H
Table 9-3
Value
Data
CxH
FxH
0xH
3xH