STMicroelectronics /STM32U031 /TIM3 /TIM3_SMCR

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Interpret as TIM3_SMCR

31 2827 2423 2019 1615 1211 87 43 0 0 0 0 0 0 0 0 00 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (B_0x0)SMS0 (B_0x0)OCCS 0 (B_0x0)TS0 (B_0x0)MSM 0 (B_0x0)ETF0 (B_0x0)ETPS 0 (B_0x0)ECE 0 (B_0x0)ETP 0 (SMS_1)SMS_1 0TS_1

ECE=B_0x0, ETP=B_0x0, OCCS=B_0x0, ETPS=B_0x0, ETF=B_0x0, MSM=B_0x0, SMS=B_0x0, TS=B_0x0

Description

TIM3 slave mode control register

Fields

SMS

SMS[2:0]: Slave mode selection

0 (B_0x0): Slave mode disabled - if CEN = 1 then the prescaler is clocked directly by the internal clock.

1 (B_0x1): Encoder mode 1 - Counter counts up/down on TI1FP1 edge depending on TI2FP2 level.

2 (B_0x2): Encoder mode 2 - Counter counts up/down on TI2FP2 edge depending on TI1FP1 level.

3 (B_0x3): Encoder mode 3 - Counter counts up/down on both TI1FP1 and TI2FP2 edges depending on the level of the other input.

4 (B_0x4): Reset Mode - Rising edge of the selected trigger input (TRGI) reinitializes the counter and generates an update of the registers.

5 (B_0x5): Gated Mode - The counter clock is enabled when the trigger input (TRGI) is high.

6 (B_0x6): Trigger Mode - The counter starts at a rising edge of the trigger TRGI (but it is not reset).

7 (B_0x7): External Clock Mode 1 - Rising edges of the selected trigger (TRGI) clock the counter.

OCCS

OCREF clear selection

0 (B_0x0): OCREF_CLR_INT is connected to COMP1 or COMP2 output depending on TIMx_OR1.

1 (B_0x1): OCREF_CLR_INT is connected to ETRF

TS

TS[2:0]: Trigger selection

0 (B_0x0): Internal Trigger 0 (ITR0)

1 (B_0x1): Internal Trigger 1 (ITR1)

2 (B_0x2): Internal Trigger 2 (ITR2)

3 (B_0x3): Internal Trigger 3 (ITR3)

4 (B_0x4): TI1 Edge Detector (TI1F_ED)

5 (B_0x5): Filtered Timer Input 1 (TI1FP1)

6 (B_0x6): Filtered Timer Input 2 (TI2FP2)

7 (B_0x7): External Trigger input (ETRF)

MSM

Master/Slave mode

0 (B_0x0): No action

1 (B_0x1): The effect of an event on the trigger input (TRGI) is delayed to allow a perfect synchronization between the current timer and its slaves (through TRGO).

ETF

External trigger filter

0 (B_0x0): No filter, sampling is done at fless thansub>DTSless than/sub>

1 (B_0x1): fless thansub>SAMPLINGless than/sub>=fless thansub>CK_INTless than/sub>, N=2

2 (B_0x2): fless thansub>SAMPLINGless than/sub>=fless thansub>CK_INTless than/sub>, N=4

3 (B_0x3): fless thansub>SAMPLINGless than/sub>=fless thansub>CK_INTless than/sub>, N=8

4 (B_0x4): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/2, N=6

5 (B_0x5): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/2, N=8

6 (B_0x6): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/4, N=6

7 (B_0x7): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/4, N=8

8 (B_0x8): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/8, N=6

9 (B_0x9): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/8, N=8

10 (B_0xA): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/16, N=5

11 (B_0xB): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/16, N=6

12 (B_0xC): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/16, N=8

13 (B_0xD): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/32, N=5

14 (B_0xE): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/32, N=6

15 (B_0xF): fless thansub>SAMPLINGless than/sub>=fless thansub>DTSless than/sub>/32, N=8

ETPS

External trigger prescaler

0 (B_0x0): Prescaler OFF

1 (B_0x1): ETRP frequency divided by 2

2 (B_0x2): ETRP frequency divided by 4

3 (B_0x3): ETRP frequency divided by 8

ECE

External clock enable

0 (B_0x0): External clock mode 2 disabled

1 (B_0x1): External clock mode 2 enabled.

ETP

External trigger polarity

0 (B_0x0): ETR is non-inverted, active at high level or rising edge

1 (B_0x1): ETR is inverted, active at low level or falling edge

SMS_1

SMS[3]

TS_1

TS[4:3]

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