topic Re: Number of flexio peripherals on kl17? in Kinetis Microcontrollers

Number of flexio peripherals on kl17?

tonymakkiel — Tue, 06 Sep 2016 11:50:42 GMT

Hi,

Can somebody please confirm the number of flexio peripherals supported by KL17? According to the document it supports

" One FlexIO module supporting emulation of additional UART, IrDA, SPI, I2C, I2S, PWM and other serial modules, etc."

Does that mean 1 FlexIO module supporting multiple serial modules at same time (eg Uart and I2C simulataneously or 2 I2C simulataneously)?

1 FlexIO module supporting 1 of the serial module? (Eg : 1 FlexIO UART or 1 FlexIO I2C)?

As per the reference manual, there is only 1 FLexIO base address "0x4005_F000".

Many Thanks,

Tony

Re: Number of flexio peripherals on kl17?

bobpaddock — Tue, 06 Sep 2016 11:53:01 GMT

FlexIO can only do one thing at a time.

Re: Number of flexio peripherals on kl17?

tonymakkiel — Tue, 06 Sep 2016 12:11:31 GMT

Thank you for the quick reply Bob.

Does that mean flexIO needs to be reconfigured run time if it needs to support another module?

I was hoping to have 2 I2C masters using flexio. with 2 different set of pins configured(eg: PORTD6 and PORTD7 for bus 1 and PORTD0 and PORTD1 for bus 2 ). I guess that is not possible?

Re: Number of flexio peripherals on kl17?

bobpaddock — Tue, 06 Sep 2016 12:23:28 GMT

FlexIO gets you one additional peripheral.
While probably not impossible, I'd say it is impractical to try to use it for two things at once even if they are both I2C.

Re: Number of flexio peripherals on kl17?

tonymakkiel — Tue, 06 Sep 2016 14:27:09 GMT

Thank you Bob Paddock.