FLEXIO Acquisition frequency

lacouturepatric — Thu, 27 Jul 2017 14:13:57 GMT

Hello,

I am using the TWR-K80F150M board, MCUXpresso IDE v10.0.0_344 and SDK_2.2_TWR-K80F150M.

For my project, i should acquire 4 serial data at 16 MHz which must be saved into sd card. For the acquisition, I use FLEXIO module and the “API FLEXIO CAMERA Receive in EDMA way” : http://mcuxpresso.nxp.com/apidoc/2.0/group__flexio__camera.html.

With the API, I succeed receiving the 4 data until 1 MHz (counter data generated from an FPGA, FLEXIO + EDMA). the FlexIO was configured to input data with an external clock's drive. I did not succeed more than 1 MHz.

Who can increase the frequency, is there any configuration on the flexio ?

I think If FlexIO is configured to input data with an external clock's drive, the clock frequency has an upper limit of 1/6 FlexIO clock frequency. For K80, the limit is 25MHz.

Thank you for your help,
Regards,
Patrice

topic FLEXIO Acquisition frequency in Kinetis Microcontrollers

FLEXIO Acquisition frequency