MCXC242VFM vs MCXC244VFM pinout differences

[MichelePerla]

Hello there,

I'm designing a board with the MCXC242VFM chip, but I wanted to make it pin to pin compatible with the MCXC244VFM in case I need more FLASH and RAM.

From the MCUXpresso Config Tool I see that there's a few pins that differ between MCXC242VFM and MCXC244VFM, but I cannot find any documentation that explains in detail the difference of pinouts.; only thing I can find online on NXP website is that from the product selection tool the MCXC242VFM is reported to have no I2S and 24 GPIOs, while the MCXC244VFM has 1 I2S and 23 GPIOs. For my project I'm not interested in the I2S.

Can someone please point me to a document that clearly states the differences of pinout and pins assignment between these two chips?

Kind regards,

Michele Perla

[Alice_Yang · Accepted solution]

Hi @MichelePerla 

The MCXC242VFM and MCXC244VFM are both available in the 32-QFN package, but they should not be assumed to be fully pin-to-pin compatible. Please compare the pin assignment tables in the MCX C24X and MCX C44X reference manual.

In particular, several pins differ between the two devices. For example, pin 5 is USB_VDD on MCXC242VFM but VOUT33 on MCXC244VFM; pin 6 is PTE16 on MCXC242VFM but VREGIN on MCXC244VFM; and pin 9 also has different analog/reference-related definitions. Therefore, if the board is intended to support both devices, these pins must be reviewed carefully in the schematic and PCB design.

MCXC242 RM: MCX C24X Sub-Family Reference Manual

MCXC244 RM: MCX C44X Sub-Family Reference Manual

Hope it helps.

BR

Alice