TMS320F28P550SJ: Analog pins without connecting to CMPSS

Wayne Huang

Genius 16285 points

Part Number: TMS320F28P550SJ
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hi champs,

I am asking this for our customer.

Can Pin A25 and C24 be connected to any CMPSS?

If not, is there any internal connection like using XBAR as a workaround for this?

The user thought all ADC can at least be connected to a specific CMPSS, but they do not find any CMPSS for these two pins and their already fix their HW board.

The user wants to use them for current protection usage.

3 months ago

+1 MatthewPate 3 months ago

TI__Guru* 80180 points

Wayne,

All CMPSS connections are listed here in the DS: https://www.ti.com/document-viewer/TMS320F28P550SJ/datasheet#GUID-A0FC1568-4CEF-4492-B878-0AD4815FAD6D/GUID-CCCD2933-BF9E-4525-A4DC-F02E47379022 as well as in the larger pin descriptions section.

These 2 pins do not have a connection to CMPSS module(many of the analog pins do not have connections to CMPSS, this is not claimed in the documentation). Customer can use this or the SYSCONFIG GUI to help select the appropriate pins for CMPSS connection.

We do not have analog X-bar or way to enable this connection on these pins. The F28P55x has many more analog pins than previous devices, as well as heavier GPIO muxing on analog pins; so it is not possible with our current CMPSS topology to support more inputs.

Best,

Matthew

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TMS320F28P550SJ: Analog pins without connecting to CMPSS