SAM3S8B Atmel Corporation, SAM3S8B Datasheet - Page 741

• Manufacturer Part Number: SAM3S8B
• Manufacturer: Atmel Corporation

32.7.10
To prevent any single software error that may corrupt USART behavior, certain address spaces can be write-protected by
setting the WPEN bit in the USART Write Protect Mode Register (US_WPMR).
If a write access to the protected registers is detected, then the WPVS flag in the USART Write Protect Status Register
(US_WPSR) is set and the field WPVSRC indicates in which register the write access has been attempted.
The WPVS flag is reset by writing the USART Write Protect Mode Register (US_WPMR) with the appropriate access key,
WPKEY.
The protected registers are:
11090A–ATARM–10-Feb-12
11090A–ATARM–10-Feb-12
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“USART Mode Register”
“USART Baud Rate Generator Register”
“USART Receiver Time-out Register”
“USART Transmitter Timeguard Register”
“USART FI DI RATIO Register”
“USART IrDA FILTER Register”
“USART Manchester Configuration Register”
Write Protection Registers
SAM3S8/SD8
SAM3S8/SD8
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