Техническая Спецификация для Atmel Xplained Pro Evaluation Kit for the ATSAMD21J18A Microcontroller ATSAMD21-XPRO ATSAMD21-XPRO
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Модели
ATSAMD21-XPRO
117
Atmel | SMART SAM D21 [DATASHEET]
Atmel-42181C–SAM-D21_Datasheet–07/2014
15.8 Register Description
Registers can be 8, 16 or 32 bits wide. Atomic 8-, 16- and 32-bit accesses are supported. In addition, the 8-bit quarters
and 16-bit halves of a 32-bit register, and the 8-bit halves of a 16-bit register can be accessed directly.
and 16-bit halves of a 32-bit register, and the 8-bit halves of a 16-bit register can be accessed directly.
Exception for APBASEL, APBBSEL and APBCSEL: These registers must only be accessed with 8-bit access.
Some registers are optionally write-protected by the Peripheral Access Controller (PAC). Write-protection is denoted by
the Write-Protected property in each individual register description. Refer to
the Write-Protected property in each individual register description. Refer to
for details.