MPC5xxxのトピックPin eMIOS5/eTPUA5/GPIO184 can't be used as eMIOS-input?

Pin eMIOS5/eTPUA5/GPIO184 can't be used as eMIOS-input?

martinklonfar — Wed, 14 Dec 2022 13:19:23 GMT

Hi,

On MPC5777C, I need to use eMIOS5 in SAIC mode. However, when I assign the eMIOS-function to the pin (SIU_PCR184 = 0x0503), the input signal almost disappears and eMIOS5 never detects any edge. Checking the pin with multimeter I found out that its resistance against GND drops to some 14-15 Ohm after assigning the eMIOS-function - hence the "disappearance" of the input signal.

Temporary re-wiring to eMIOS23 solved the issue, but that's not a long-term option.

Is it possible to use the eMIOS-input function on this pin?

Re: Pin eMIOS5/eTPUA5/GPIO184 can't be used as eMIOS-input?

PetrS — Thu, 15 Dec 2022 07:52:21 GMT

Hi,

no, it is not possible to use pin for eMIOS input, it is output only pin

BR, Petr

Re: Pin eMIOS5/eTPUA5/GPIO184 can't be used as eMIOS-input?

martinklonfar — Thu, 15 Dec 2022 16:40:26 GMT

Thanks for explaining. Which document is Your screenshot taken from, please? Because I need to identify all eMIOS channels with this feature ...

Re: Pin eMIOS5/eTPUA5/GPIO184 can't be used as eMIOS-input?

PetrS — Thu, 15 Dec 2022 19:45:56 GMT

Hi,

words from RM's chapter 3.5 External signal descriptions, multiplexing, and attributes...
Details about external signal functions, their static electrical characteristics, and pad configuration settings for this chip appear in the spreadsheet that is embedded within this document:
MPC5777C_System_IO_Definition.xlsx
To access this spreadsheet, view the document's list of attachments.

BR, Petr