ST STM32F100 Series Reference Manual page 427

RM0041
Bit 4 CC2E: Capture/Compare 2 output enable
Bit 3 CC1NP: Capture/Compare 1 complementary output polarity
Note: This bit is not writable as soon as LOCK level 2 or 3 has been programmed (LOCK bits
Bit 2 CC1NE: Capture/Compare 1 complementary output enable
Bit 1 CC1P: Capture/Compare 1 output polarity
Note: This bit is not writable as soon as LOCK level 2 or 3 has been programmed (LOCK bits
Bit 0 CC1E: Capture/Compare 1 output enable
refer to CC1E description
0: OC1N active high
1: OC1N active low
in TIMx_BDTR register) and CC1S="00" (the channel is configured in output).
0: Off - OC1N is not active. OC1N level is then function of MOE, OSSI, OSSR, OIS1, OIS1N
and CC1E bits.
1: On - OC1N signal is output on the corresponding output pin depending on MOE, OSSI,
OSSR, OIS1, OIS1N and CC1E bits.
CC1 channel configured as output:
0: OC1 active high
1: OC1 active low
CC1 channel configured as input:
The CC1NP/CC1P bits select the polarity of TI1FP1 and TI2FP1 for trigger or capture
operations.
00: noninverted/rising edge: circuit is sensitive to TIxFP1's rising edge (capture, trigger in
reset or trigger mode), TIxFP1 is not inverted (trigger in gated mode).
01: inverted/falling edge: circuit is sensitive to TIxFP1's falling edge (capture, trigger in reset,
or trigger mode), TIxFP1 is inverted (trigger in gated mode).
10: reserved, do not use this configuration.
11: noninverted/both edges: circuit is sensitive to both the rising and falling edges of TIxFP1
(capture, trigger in reset or trigger mode), TIxFP1 is not inverted (trigger in gated mode).
in TIMx_BDTR register)..
CC1 channel configured as output:
0: Off - OC1 is not active. OC1 level is then function of MOE, OSSI, OSSR, OIS1, OIS1N
and CC1NE bits.
1: On - 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
General-purpose timers (TIM15/16/17)
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