RM0312 datasheet(154/275 Pages) STMICROELECTRONICS

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16-bit general purpose timer (TIM2/TIM3)

RM0312

154/275

DocID022352 Rev 3

Channel configured in input

17.7.11

Capture/compare enable register 1 (TIMx_CCER1)

Address offset: 0x0A

Reset value: 0x00

654

3210

IC2F[3:0]

IC2PSC[1:0]

CC2S[1:0]

Bits 7:4 IC2F: Input capture 2 filter

Bits 3:2 IC2PSC: Input capture 2 prescaler

Bits 1:0 CC2S: Capture/Compare 2 selection

This bit-field defines the direction of the channel (input/output) as well as the used input.

00: CC2 channel is configured as output.

01: CC2 channel is configured as input, IC2 is mapped on TI2FP2.

10: CC2 channel is configured as input, IC2 is mapped on TI1FP2.

11: Reserved

Note: CC2S bits are writable only when the channel is OFF (CC2E = ’0’ in TIMx_CCER1).

654

3210

Reserved

CC2P

CC2E

Reserved

CC1P

CC1E

Bits 6:7 Reserved

Bit 5 CC2P: Capture/Compare 2 output polarity

refer to CC1P description

Bit 4 CC2E: Capture/Compare 2 output enable

refer to CC1E description

Bits 2:3 Reserved

Bit 1 CC1P: Capture/Compare 1 output polarity

CC1 channel configured as output:

0 : OC1 active high

1 : OC1 active low

CC1 channel configured as input for capture function (see Figure 51):

0 : Capture is done on a rising edge of TI1F or TI2F

1 : Capture is done on a falling edge of TI1F or TI2F

Bit 0 CC1E: Capture/Compare 1 output enable

CC1 channel configured as output:

0 : Off - OC1 is not active.

1 : On - OC1 signal is output on the corresponding output pin.

CC1 channel configured as input:

In this case 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.

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