ST STM8S Reference Manual

RM0016 16-bit general purpose timers (TIM2, TIM3, TIM5)
Doc ID 14587 Rev 8 225/449
18.6.3 Slave mode control register (TIM5_SMCR)
Address offset: 0x02
Reset value: 0x00
Note: This register is only available in TIM5, see Table 42 on page 241.
76543210
MSM TS[2:0]
Reserved
SMS[2:0]
rw rw rw rw rw rw rw
Bit 7 MSM Master/slave mode
0: No action
1: The effect of an event on the trigger input (TRGI) is delayed to allow a perfect synchronization
between timers (through TRGO).
Bits 6:4 TS[2:0] Trigger selection
This bitfield selects the trigger input to be used to synchronize the counter.
000: Internal trigger ITR0 connected to TIM6 TRGO
001: Reserved
010: Reserved
011: Internal trigger ITR3 connected to TIM1 TRGO
100: TI1 edge detector (TI1F_ED)
101: Filtered timer input 1 (TI1FP1)
110: Filtered timer input 2 (TI2FP2)
111: External trigger input (ETRF) (from TIM1_ETR pin).
Note: These bits must only be changed when they are not used (e.g. when SMS = 000) to avoid
wrong edge detections at the transition.
Bit 3 Reserved.
Bits 2:0 SMS[2:0] Clock/trigger/slave mode selection
When external signals are selected, the active edge of the trigger signal (TRGI) is linked to the
polarity selected on the external input (see Input Control register and Control Register description).
000: Clock/trigger controller disabled - if CEN = 1 then the prescaler is clocked directly by the
internal clock.
001, 010 and 011: Reserved
100: Trigger reset mode - Rising edge of the selected trigger signal (TRGI) reinitializes the counter
and generates an update of the registers.
101: Gated mode - The counter clock is enabled when the trigger signal (TRGI) is high. The counter
stops (but is not reset) as soon as the trigger becomes low. Both the start and stop of the counter
are controlled.
110: Trigger mode - The counter starts at a rising edge of the trigger TRGI (but it is not reset). Only
the start of the counter is controlled.
111: External clock mode 1 - Rising edges of the selected trigger (TRGI) clock the counter

ST STM8S Specifications

General

Brand	ST
Model	STM8S
Category	Microcontrollers
Language	English