22.13.8 Clock Selection

Name: CLKSEL
Offset: 0x07
Reset: 0x00
Property: -

Bit 76543210 
       CLKSEL[1:0] 
Access R/WR/W 
Reset 00 

Bits 1:0 – CLKSEL[1:0] Clock Select

Writing these bits select the source for the RTC clock (CLK_RTC).

ValueNameDescription
0x00INT32KInternal 32.768 kHz oscillator
0x01INT1KInternal 1.024 kHz oscillator
0x02TOSC32K32.768 kHz crystal oscillator
0x03EXTCLKExternal clock from EXTCLK pin