Termination of not used pins in DM365

Ayus

Hello,


We need information about Proper termination of not used pins in DM365.
The datasheet has details of proper termination for only few pins.  
but there is not details about pins like 
MMCSD0,ISIF group,LCD_OE,McBSP,PCLK,PRTCSS group,DDR_A13,GIO0... etc
Even the wiki page has not details on that.

Please let us know if there is any information on this.



Regards.

over 14 years ago

0 Ayus over 14 years ago

Intellectual 825 points

Any comments!

0 crunchex over 13 years ago in reply to Ayus

Prodigy 60 points

I also need to know the answer to this as well. Specifically, I'm working with the DM368. Thanks.

0 Ivan Garcia over 13 years ago in reply to crunchex

TI__Genius 9775 points

Most unused analog interface termination should be already documented on the data sheet. For the other pins, such as those listed, the basic recommendation is as follows:

For pins configured as inputs

If the pin has an IPU/IPD, you may only rely on it if the pin is not routed out
If the pin does not have an IPU/IPD, it is not recommended that it's left floating. The pin will consume additional power (in the order of 3-7 mA per pin in some instances)
- In this case, the recommendation is to either use an external PU/PD (this will save power during, and after reset) or...
- Configure the pin as a GPIO (if option is available) and program to constantly drive the pin (note that there will not be any power savings benefit during reset in this case)

For pins configured as outputs

Pins may be left floating, as they're already properly driving the buffer to a valid sate

PRTCSS pin configuration can be found on both the User's Guide in the product folder, or data sheet.

0 crunchex over 13 years ago in reply to Ivan Garcia

Prodigy 60 points

Thanks Ivan, this is very helpful. How about certain power pins such as VSSA_ADC? I am not using the ADC on the DM368.

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Termination of not used pins in DM365