ST STM32G471 User Manual

General-purpose timers (TIM2/TIM3/TIM4/TIM5) RM0440
1310/2126 RM0440 Rev 4
Bits 11:8 ETF[3:0]: External trigger filter
This bit-field then defines the frequency used to sample tim_etrp signal and the length of the
digital filter applied to tim_etrp. The digital filter is made of an event counter in which N
consecutive events are needed to validate a transition on the output:
0000: No filter, sampling is done at f
DTS
0001: f
SAMPLING
=f
tim_ker_ck
, N=2
0010: f
SAMPLING
=f
tim_ker_ck
, N=4
0011: f
SAMPLING
=f
tim_ker_ck
, N=8
0100: f
SAMPLING
=f
DTS
/2, N=6
0101: f
SAMPLING
=f
DTS
/2, N=8
0110: f
SAMPLING
=f
DTS
/4, N=6
0111: f
SAMPLING
=f
DTS
/4, N=8
1000: f
SAMPLING
=f
DTS
/8, N=6
1001: f
SAMPLING
=f
DTS
/8, N=8
1010: f
SAMPLING
=f
DTS
/16, N=5
1011: f
SAMPLING
=f
DTS
/16, N=6
1100: f
SAMPLING
=f
DTS
/16, N=8
1101: f
SAMPLING
=f
DTS
/32, N=5
1110: f
SAMPLING
=f
DTS
/32, N=6
1111: f
SAMPLING
=f
DTS
/32, N=8
Bit 7 MSM: Master/Slave mode
0: No action
1: The effect of an event on the trigger input (tim_trgi) is delayed to allow a perfect
synchronization between the current timer and its slaves (through tim_trgo). It is useful if we
want to synchronize several timers on a single external event.

ST STM32G471 Specifications

General

Brand	ST
Model	STM32G471
Category	Microcontrollers
Language	English