S32K144 PORT

[Embedded_novice]

Hi:

    I want to configure the PORTB pins of S32K144 in EB project, but I find that some of the PCR values of the pins are wrong after configuration, such as PORTB0-14, is there anything special about these pins? My MCU package is LQFP_100, thank you for your help!

[Embedded_novice]

I see. It's my understanding. I think PORTA has 18 pins, so the PCR of PORTB_0 should be 19, but in fact, the PCR value is calculated according to the maximum 32 per PORT group, PORTA occupies 0-32, PORTB_0 should start from 33.

However, when I checked the section on the number of PORT pins in the RM manual, there seemed to be no clear mark indicating that I should calculate according to the absence of 32 pins in the PORT group. Could you tell me where in the manual to get this information?

[VaneB · Accepted solution]

Hi @Embedded_novice 

Section 3.6 (Driver usage and configuration tips) of the User Manual for S32K1_S32M24X PORT Driver provides a formula to obtain the PortPinPcr value. For easy reference, I am adding it to my response, but you can find the document for example C:\NXP\SW32K1_S32M24x_RTD_4.4_R21-11_2.0.0\eclipse\plugins\Port_TS_T40D2M20I0R0\doc.

The value of actual PortPin Pcr is identified by the formula: PortPinPcr = PinId + PortId∗32. Where PortId is the numeric identifier of the port.

For example, the PortPinPcr value of PTC7 will be 7 + (2∗32) = 71.

B.R.

VaneB