C8051F970-A-GM Datasheet, PDF (415/454 Pages) Silicon Laboratories – Low Power Capacitive Sensing MCU with up to 32 kB of Flash

C8051F97x
Table 32.15. TMR3CN Register Bit Descriptions
Bit
Name
Function
1:0
T3XCLK Timer 3 External Clock Select.
This bit selects the external clock source for Timer 3. If Timer 3 is in 8-bit mode, this bit
selects the external oscillator clock source for both timer bytes. However, the Timer 3
Clock Select bits (T3MH and T3ML in register CKCON) may still be used to select
between the external clock and the system clock for either timer. Note: External clock
sources are synchronized with the system clock.
00: External Clock is SYSCLK/12. Capture trigger is RTC.
01: External Clock is External Oscillator/8. Capture trigger is RTC.
10: External Clock is SYSCLK/12. Capture trigger is External Oscillator/8.
11: External Clock is RTC. Capture trigger is External Oscillator/8.
416
Rev 1.0