Kinetis MicrocontrollersのトピックRe: QEI inputs

QEI inputs

marcelo_freek — Mon, 02 Apr 2012 06:15:10 GMT

I´m looking for a Kinetis with quadrature encoder input.

None found. Is it correct ?

Thanks.

Re: QEI inputs

mf_kappa — Sun, 23 Sep 2012 09:39:45 GMT

See K-40 Series, With Flex timer peripheral.

Has option to Quadrature Decoder mode

Re: QEI inputs

apanecatl — Mon, 22 Oct 2012 15:48:10 GMT

All the kinetis microcontrollers feature one or more FlexTimers (FTM) which supports Quadrature decoder with input filters, relative position counting, and interrupt on position count or capture of position count on external event

Re: QEI inputs

JimDon — Tue, 23 Oct 2012 12:14:38 GMT

Just one problem with that answer - it is not correct. Not all Kinetis MCUs have a an FTM.

It seems you are not the only one with this mistaken notion. On the Freedom Board they pinned it out as FTM, when in fact it is TPM.

Example:

The KL25 Has a TPM, quoting from the RM:

(Document Number: KL25P80M48SF0RM)

"The TPM is built upon a very simple timer (HCS08 Timer PWM Module – TPM) used

for many years on Freescale's 8-bit microcontrollers. The TPM extends the functionality

to support operation in low power modes by clocking the counter, compare and capture

registers from an asynchronous clock that can remain functional in low power modes"

Re: QEI inputs

apanecatl — Tue, 23 Oct 2012 13:42:17 GMT

I forgot to mention I was referring to the K family