RM0312 datasheet(153/275 Pages) STMICROELECTRONICS

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RM0312

16-bit general purpose timer (TIM2/TIM3)

170

17.7.10

Capture/compare mode register 2 (TIMx_CCMR2)

Note:

Refer to Capture/compare mode register 1 (TIMx_CCMR1) for details on using these bits.

Address offset: 0x09

Reset value: 0x00

Channel configured in output

Bits 3:2 IC1PSC: Input capture 1 prescaler

This bit-field defines the ratio of the prescaler acting on CC1 input (IC1).

The prescaler is reset as soon as CC1E=’0’ (TIMx_CCER register).

00: no prescaler, capture is done each time an edge is detected on the capture input.

01: Capture is done once every 2 events.

10: Capture is done once every 4 events.

11: Capture is done once every 8 events.

Note: The internal event counter is not reset when IC1PSC is changed on the fly. In this case the old

value is used until the next capture occurs. To force a new value to be taken in account

immediately, you can clear the CC1E bit and set it again.

Bits 1:0 CC1S: Capture/Compare 1 selection

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

00: CC1 channel is configured as output.

01: CC1 channel is configured as input, IC1 is mapped on TI1FP1.

10: CC1 channel is configured as input, IC1 is mapped on TI2FP1.

11: Reserved

Note: CC1S bits are writable only when the channel is OFF (CC1E= ’0’ in TIMx_CCER1 and

updated).

654

3210

Reserved

OC2M[2:0]

OC2PE

OC2FE

CC2S[1:0]

Bit 7 Reserved

Bits 6:4 OC2M: Output compare 2 mode

Bit 3 OC2PE: Output compare 2 preload enable

Bit 2 OC2FE: Output compare 2 fast enable

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).

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