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AT90SCR100 Datasheet(PDF) 377 Page - ATMEL Corporation

Part # AT90SCR100
Description  8-bit Microcontroller for Smart Card Readers
PDF  433 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT90SCR100 Datasheet(HTML) 377 Page - ATMEL Corporation

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TPR0327AY–SMS–30Jan09
AT90SCR100
29. Memory Programming
29.1
Program And Data Memory Lock Bits
The AT90SCR100 provides six Lock bits which can be left unprogrammed (“1”) or can be pro-
grammed (“0”) to obtain the additional features listed in Table 29-2. The Lock bits can only be
erased to “1” with the Chip Erase command.
Notes: 1. “1” means unprogrammed, “0” means programmed
Table 29-1.
Lock Bit Byte(1)
Lock Bit Byte
Bit No
Description
Default Value
–
7
–
1 (unprogrammed)
–
6
–
1 (unprogrammed)
BLB12
5
Boot Lock bit
1 (unprogrammed)
BLB11
4
Boot Lock bit
1 (unprogrammed)
BLB02
3
Boot Lock bit
1 (unprogrammed)
BLB01
2
Boot Lock bit
1 (unprogrammed)
LB2
1
Lock bit
1 (unprogrammed)
LB1
0
Lock bit
1 (unprogrammed)



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