AT83EC5123 ATMEL Corporation, AT83EC5123 Datasheet - Page 154

• Manufacturer Part Number: AT83EC5123
• Description: (AT8xx512x) Smart Card Reader ICs
• Manufacturer: ATMEL Corporation

ROM Configuration
Register
154
AT8xC5122/23
The ROM Configuration Register is masked and is not accessible by the MCU. It con-
tains fuse bits which enable the product configuration.
Table 113. ROM Configuration Register for AT8xC5122
Table 114. ROM Configuration Register for AT8xC5123
Number
Number
5 - 3
2 - 0
7 - 3
Bit
Bit
7
6
7
7
-
Mnemonic Description
Mnemonic Description
BLJRB
LB2:0
BLJRB
Bit
Bit
6
6
-
-
-
-
Reserved
Bootloader Jump Rom Bit
Set to configure User Code in ROM with a reset@0000h
Clear to configure in CRAM/ROM (Bootloader mode with a reset@F800h)
Reserved
Program Lock Bits
The program lock bits protects the on-chip program against software piracy.
The AT8xC5122 products are delivered with the lowest protection level as
detailed in the following table:
Reserved
LB2
1
1
5
5
-
LB1
1
0
4
4
LB0
-
1
1
Security
Level
1
2
3
3
-
Protection Description
No program lock features enabled.
Read test mode function is disabled.
High pin count package
MOVC instruction executed from external
program memory are disabled from
fetching code bytes from internal memory.
EA is sampled and latched on reset.
External execution is enabled.
Checksum control is enabled.
Low pin count package
Checksum control is enabled.
LB2
LB2
2
2
LB1
LB1
1
1
4202B–SCR–07/03
LB0
LB0
0
0