25.8.9 Counter Period

Table 25-23. Register Bit Attribute Legend
SymbolDescriptionSymbolDescriptionSymbolDescription
RReadable bitHCCleared by Hardware(Grey cell)Unimplemented
WWritable bitHSSet by HardwareXBit is unknown at Reset
KWrite to clearSSoftware settable bit
Name: PER
Offset: 0x1C
Reset: 0x0000
Property: RW

Bit 15141312111098 
 PER[15:8] 
Access  
Reset 00000000 
Bit 76543210 
 PER[7:0] 
Access  
Reset 00000000 

Bits 15:0 – PER[15:0] Counter Period

These bits define the value of the 16-bit RTC period in COUNT16 mode (CTRLA.MODE=1).