STM32W108HB datasheet(180/278 Pages) STMICROELECTRONICS

Part #	STM32W108HB

Description	High-performance, IEEE 802.15.4 wireless system-on-chip with up to 256 Kbytes of embedded Flash memory

PDF	278 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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180 / 278 page

General-purpose timers

STM32W108HB STM32W108CC STM32W108CB STM32W108CZ

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Doc ID 16252 Rev 14

Figure 40 gives an example of counter behavior when IC1FP1 polarity is inverted (same

configuration as above except CC1P = 1).

Figure 40.

Example of encoder interface mode with IC1FP1 polarity inverted

The timer configured in encoder interface mode provides information on a sensor's current

position. To obtain dynamic information (speed, acceleration/deceleration), measure the

period between two encoder events using a second timer configured in capture mode. The

output of the encoder that indicates the mechanical zero can be used for this purpose.

Depending on the time between two events, the counter can also be read at regular times.

Do this by latching the counter value into a third input capture register. (In this case the

capture signal must be periodic and can be generated by another timer).

10.1.12

Timer input XOR function

The TI1S bit in the TIM1_CR2 register allows the input filter of channel 1 to be connected to

the output of a XOR gate that combines the three input pins TIMxC2 to TIMxC4.

The XOR output can be used with all the timer input functions such as trigger or input

capture. It is especially useful to interface to Hall effect sensors.

STM32W108HB Datasheet(PDF) 180 Page - STMicroelectronics