STR720 datasheet(328/401 Pages) STMICROELECTRONICS

328 / 401 page

STR720 - EXTENDED FUNCTION TIMER (EFT)

328/401

Bit 7= OCBE: Output Compare B Enable

0: Output Compare B function is enabled, but the OCMPB pin is a general I/O.

1: Output Compare B function is enabled, the OCMPB pin is dedicated to the Output Compare

B capability of the timer.

Bit 6= OCAE: Output Compare A Enable

0: Output Compare A function is enabled, but the OCMPA pin is a general I/O.

1: Output Compare A function is enabled, the OCMPA pin is dedicated to the Output Compare

A capability of the timer.

Bit 5 = OPM: One Pulse Mode

0: One Pulse Mode is not active.

1: One Pulse Mode is active, the ICAPA pin can be used to trigger one pulse on the OCMPA

pin; the active transition is given by the IEDGA bit. The length of the generated pulse depends

on the contents of the OCAR register.

Bit 4 = PWM: Pulse Width Modulation

0: PWM mode is not active.

1: PWM mode is active, the OCMPA pin outputs a programmable cyclic signal; the length of

the pulse depends on the value of OCAR register; the period depends on the value of OCBR

Bit 3 = IEDGB: Input Edge B

This bit determines which type of level transition on the ICAPB pin will trigger the capture.

0: A falling edge triggers the capture.

1: A rising edge triggers the capture.

Bit 2 = IEDGA: Input Edge A

This bit determines which type of level transition on the ICAPA pin will trigger the capture.

0: A falling edge triggers the capture.

1: A rising edge triggers the capture.

Bit 1 = EXEDG: External Clock Edge

This bit determines which type of level transition on the external clock pin (or internal signal)

EXTCLK will trigger the counter.

0: A falling edge triggers the counter.

1: A rising edge triggers the counter.

Bit 0 = ECKEN: External Clock Enable

0: Internal clock, divided by prescaler division factor, is used to feed timer clock.

1: External source is used for timer clock.

STR720 数据表(PDF) 328 Page - STMicroelectronics

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