ST92141 datasheet(111/179 Pages) STMICROELECTRONICS

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ST92141 - EXTENDED FUNCTION TIMER (EFT)

EXTENDED FUNCTION TIMER (Cont’d)

CONTROL REGISTER 1 (CR1)

R252 - Read/Write

Reset Value: 0000 0000 (00h)

Bit 7 = ICIE

Input Capture Interrupt Enable.

0: Interrupt is inhibited.

1: A timer interrupt is generated whenever the

ICF1 or ICF2 bit of the SR register is set.

Bit 6 = OCIE

Output Compare Interrupt Enable.

0: Interrupt is inhibited.

1: A timer interrupt is generated whenever the

OCF1 or OCF2 bit of the SR register is set.

Bit 5 = TOIE

Timer Overflow Interrupt Enable.

0: Interrupt is inhibited.

1: A timer interrupt is enabled whenever the TOF

bit of the SR register is set.

Bit 4 = FOLV2

Forced Output Compare 2.

0: No effect.

1: Forces the OLVL2 bit to be copied to the

OCMP2 pin.

Bit 3 = FOLV1

Forced Output Compare 1.

0: No effect.

1: Forces OLVL1 to be copied to the OCMP1 pin.

Bit 2 = OLVL2

Output Level 2.

This bit is copied to the OCMP2 pin whenever a

successful comparison occurs with the OC2R reg-

ister and OC2E is set in the CR2 register. This val-

ue is copied to the OCMP1 pin in One Pulse Mode

and Pulse Width Modulation mode.

Bit 1 = IEDG1

Input Edge 1.

This bit determines which type of level transition

on the ICAP1 pin will trigger the capture.

0: A falling edge triggers the capture.

1: A rising edge triggers the capture.

Bit 0 = OLVL1

Output Level 1.

The OLVL1 bit is copied to the OCMP1 pin when-

ever a successful comparison occurs with the

OC1R register and the OC1E bit is set in the CR2

ICIE OCIE TOIE FOLV2 FOLV1 OLVL2 IEDG1 OLVL1

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