STM32W108C8

General-purpose timers
STM32W108C8
Figure 46. Triggering timer 2 with update of Timer 1
As in the previous example, both counters can be initialized before starting counting.
Figure 45 shows the behavior with the same configuration shown in Figure 46, but in trigger
mode instead of gated mode (TIM_SMS = 110 in the TIM2_SMCR register).
Figure 47. Triggering Timer 2 with enable of Timer 1
Starting both timers synchronously in response to an external trigger
This example, sets the enable of Timer 1 when its TI1 input rises, and the enable of Timer 2
with the enable of Timer 1. Refer to Figure 43 for connections. To ensure the counters are
aligned, Timer 1 must be configured in master/slave mode (slave with respect to TI1, master
with respect to Timer 2):
● Configure Timer 1 in master mode to send its Enable as trigger output (TIM_MMS =
001 in the TIM1_CR2 register).
● Configure Timer 1 slave mode to get the input trigger from TI1 (TIM_TS = 100 in the
TIM1_SMCR register).
● Configure Timer 1 in trigger mode (TIM_SMS = 110 in the TIM1_SMCR register).
139/215 Doc ID 018587 Rev 2