Period

The RTC.PERL and RTC.PERH register pair represents the 16-bit value, RTC.PER. The low byte [7:0] (suffix L) is accessible at the original offset. The high byte [15:8] (suffix H) can be accessed at offset + 0x01. For more details on reading and writing 16-bit registers, refer to Accessing 16-bit Registers.

Due to synchronization between the RTC clock and system clock domains, there is a latency of two RTC clock cycles from updating the register until this has an effect. Application software needs to check that the STATUS.PERBUSY flag is cleared before writing to this register.

Name:
PER
Offset:
0x0A
Reset:
0xFF
Access:
-
Bit15141312111098
PER[15:8]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset11111111
Bit76543210
PER[7:0]
AccessR/WR/WR/WR/WR/WR/WR/WR/W
Reset11111111

Bits 15:8 – PER[15:8]: Period high byte

Period high byte

These bits hold the MSB of the 16-bit period register.

Bits 7:0 – PER[7:0]: Period low byte

Period low byte

These bits hold the LSB of the 16-bit period register.