ST72361AR4-Auto datasheet(111/279 Pages) STMICROELECTRONICS

111 / 279 page

ST72361xx-Auto

16-bit timer

Doc ID 12468 Rev 3

111/279

Figure 55.

Output compare timing diagram, fTIMER =fCPU/2

Figure 56.

Output compare timing diagram, fTIMER =fCPU/4

12.3.8

One pulse mode

One Pulse mode enables the generation of a pulse when an external event occurs. This

mode is selected via the OPM bit in the CR2 register.

The One Pulse mode uses the Input Capture1 function and the Output Compare1 function.

Procedure

To use One Pulse mode:

Load the OC1R register with the value corresponding to the length of the pulse (see the

formula in the opposite column).

Select the following in the CR1 register:

–

Using the OLVL1 bit, select the level to be applied to the OCMP1 pin after the

pulse.

–

Using the OLVL2 bit, select the level to be applied to the OCMP1 pin during the

pulse.

–

Select the edge of the active transition on the ICAP1 pin with the IEDG1 bit (the

ICAP1 pin must be configured as floating input).

INTERNAL CPU CLOCK

TIMER CLOCK

COUNTER REGISTER

OUTPUT COMPARE REGISTER i (OCRi)

OUTPUT COMPARE FLAG i (OCFi)

OCMPi PIN (OLVLi =1)

2ED3

2ED0

2ED1 2ED2

2ED3 2ED4

2ECF

INTERNAL CPU CLOCK

TIMER CLOCK

COUNTER REGISTER

OUTPUT COMPARE REGISTER i (OCRi)

COMPARE REGISTER i LATCH

2ED3

2ED0

2ED1 2ED2

2ED3 2ED4

2ECF

OCMPi PIN (OLVLi =1)

OUTPUT COMPARE FLAG i (OCFi)

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