Advanced-control timers (TIM1/TIM8/TIM20) RM0440
1200/2126 RM0440 Rev 4
Bit 1 CC1P: Capture/compare 1 output polarity
CC1 channel configured as output:
0: tim_oc1 active high
1: tim_oc1 active low
CC1 channel configured as input: CC1NP/CC1P bits select the active polarity of
tim_ti1fp1 and tim_ti2fp1 for trigger or capture operations.
00: non-inverted/rising edge. The circuit is sensitive to tim_tixfp1 rising edge (capture or
trigger operations in reset, external clock or trigger mode), tim_tixfp1 is not inverted
(trigger operation in gated mode or encoder mode).
01: inverted/falling edge. The circuit is sensitive to tim_tixfp1 falling edge (capture or trigger
operations in reset, external clock or trigger mode), tim_tixfp1 is inverted (trigger
operation in gated mode or encoder mode).
10: reserved, do not use this configuration.
11: non-inverted/both edges/ The circuit is sensitive to both tim_tixfp1 rising and falling
edges (capture or trigger operations in reset, external clock or trigger mode), tim_tixfp1
is not inverted (trigger operation in gated mode). This configuration must not be used in
encoder mode.
Note: This bit is not writable as soon as LOCK level 2 or 3 has been programmed (LOCK bits
in TIMx_BDTR register).
Note: On channels having a complementary output, this bit is preloaded. If the CCPC bit is
set in the TIMx_CR2 register then the CC1P active bit takes the new value from the
preloaded bit only when a Commutation event is generated.
Bit 0 CC1E: Capture/compare 1 output enable
CC1 channel configured as output:
0:Off - tim_oc1 is not active. tim_oc1 level is then function of MOE, OSSI, OSSR, OIS1,
OIS1N and CC1NE bits.
1:On - tim_oc1 signal is output on the corresponding output pin depending on MOE, OSSI,
OSSR, OIS1, OIS1N and CC1NE bits.
CC1 channel configured as input: This bit determines if a capture of the counter value can
actually be done into the input capture/compare register 1 (TIMx_CCR1) or not.
0: Capture disabled.
1: Capture enabled.
Note: On channels having a complementary output, this bit is preloaded. If the CCPC bit is
set in the TIMx_CR2 register then the CC1E active bit takes the new value from the
preloaded bit only when a Commutation event is generated.
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