STM8S datasheet(236/467 Pages) STMICROELECTRONICS

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16-bit general purpose timers (TIM2, TIM3, TIM5)

RM0016

236/467

DocID14587 Rev 14

18.6.8

Capture/compare mode register 1 (TIMx_CCMR1)

The channel can be used in input (capture mode) or in output (compare mode). The

direction of the channel is defined by configuring the CC1S bits. All the other bits of this

its function when the channel is configured in output and ICi describes its function when the

channel is configured in input. Therefore, be aware that the same bit can have a different

meaning for the input stage and for the output stage.

Address offset: 0x05 or 0x07 (TIM2), 0x05 (TIM3), 0x07 (TIM5); for TIM2 address see

Section

Reset value: 0x00

Channel configured in output

654

3210

Reserved

OC1M[2:0]

OC1PE

Reserved

CC1S[1:0]

Bit 7 Reserved

Bits 6:4 OC1M[2:0]: Output compare 1 mode

These bits defines the behavior of the output reference signal OC1REF from which OC1 is derived.

OC1REF is active high whereas OC1 active level depends on the CC1P bit.

000: Frozen - The comparison between the output compare register TIMx_CCR1 and the counter

TIMx_CNT has no effect on the outputs

001: Set channel 1 to active level on match. OC1REF signal is forced high when the counter

TIMx_CNT matches the capture/compare register 1 (TIMx_CCR1).

010: Set channel 1 to inactive level on match. OC1REF signal is forced low when the counter

TIMx_CNT matches the capture/compare register 1 (TIMx_CCR1).

011: Toggle - OC1REF toggles when TIMx_CNT=TIMx_CCR1

100: Force inactive level - OC1REF is forced low

101: Force active level - OC1REF is forced high

110: PWM mode 1 - In up-counting, channel 1 is active as long as TIMx_CNT< TIMx_CCR1.

Otherwise, channel 1 is inactive. In down-counting, channel 1 is inactive (OC1REF = 0) as long as

TIMx_CNT> TIMx_CCR1. Otherwise, channel 1 is active (OC1REF = 1).

111: PWM mode 2 - In up-counting, channel 1 is inactive as long as TIMx_CNT< TIMx_CCR1.

Otherwise, channel 1 is active.

Note: In PWM mode 1 or 2, the OCiREF level changes only when the result of the comparison

changes or when the output compare mode switches from “frozen” mode to “PWM” mode.

Refer to Section 17.5.7 on page 174 for more details.

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