ST STM32G473 User Manual

RM0440 Rev 4 1395/2126
RM0440 General-purpose timers (TIM15/TIM16/TIM17)
1445
30.7.4 TIM15 DMA/interrupt enable register (TIM15_DIER)
Address offset: 0x0C
Reset value: 0x0000
Bits 16, 2, 1, 0 SMS[3:0]: Slave mode selection
When external signals are selected the active edge of the trigger signal (tim_trgi) is linked to
the polarity selected on the external input (see Input Control register and Control Register
description.
0000: Slave mode disabled - if CEN = ‘1’ then the prescaler is clocked directly by the
internal clock.
0001: Reserved
0010: Reserved
0011: Reserved
0100: Reset Mode - Rising edge of the selected trigger input (tim_trgi) reinitializes the
counter and generates an update of the registers.
0101: Gated Mode - The counter clock is enabled when the trigger input (tim_trgi) is high.
The counter stops (but is not reset) as soon as the trigger becomes low. Both start
and stop of the counter are controlled.
0110: Trigger Mode - The counter starts at a rising edge of the trigger tim_trgi (but it is not
reset). Only the start of the counter is controlled.
0111: External Clock Mode 1 - Rising edges of the selected trigger (tim_trgi) clock the
counter.
1000: Combined reset + trigger mode - Rising edge of the selected trigger input (tim_trgi)
reinitializes the counter, generates an update of the registers and starts the counter.
1001: Combined gated + reset mode - The counter clock is enabled when the trigger input
(tim_trgi) is high. The counter stops and is reset) as soon as the trigger becomes low.
Both start and stop of the counter are controlled.
Others: Reserved.
Note: The gated mode must not be used if tim_ti1f_ed is selected as the trigger input
(TS=’00100’). Indeed, tim_ti1f_ed outputs 1 pulse for each transition on tim_ti1f,
whereas the gated mode checks the level of the trigger signal.
Note: The clock of the slave peripherals (timer, ADC, ...) receiving the tim_trgo signal must be
enabled prior to receive events from the master timer, and the clock frequency
(prescaler) must not be changed on-the-fly while triggers are received from the master
timer.
1514131211109876543210
Res. TDE
COMD
E
Res. Res. CC2DE CC1DE UDE BIE TIE COMIE Res. Res. CC2IE CC1IE UIE
rw rw rw rw rw rw rw rw rw rw rw
Bit 15 Reserved, must be kept at reset value.
Bit 14 TDE: Trigger DMA request enable
0: Trigger DMA request disabled
1: Trigger DMA request enabled
Bit 13 COMDE: COM DMA request enable
0: COM DMA request disabled
1: COM DMA request enabled
Bits 12:11 Reserved, must be kept at reset value.

ST STM32G473 Specifications

General

Brand	ST
Model	STM32G473
Category	Microcontrollers
Language	English