Part Number: TMS570LS3137
Couple of Question on unused pin configuration of TMS570LS3137 microcontroller .
As per power reduction manual SPNA173 all the unused GIO pins should be made as output and driven low to reduce power consumption.
1. We have couple of discrete which are not used but they are part of peripheral which are already in powered down mode, do I need to enable peripheral (remove from power down mode) and configure the unused pins as GIO and set low ?
or I can just configure the unused pins as output and drive low without enabling peripheral (remove from power down mode).
2. I believe power consumption manual just talks about unused GIO and doesn't mentioned anything about any other unused pin of microcontroller(we are not sure about unused pins of microcontroller) , because in my project we have some unused microcontroller pin like EMIF_nRAS, EMIF_nCAS etc
EMIF_nRAS, EMIF_nCAS, cannot be made as output and driven low from software , so how are we supposed to handle these signals ? or power reduction technique is not applicable to non GIO pins.
3. Some pins are multiplexed like EMIF_ADDR[]19]/RTP_nENA : even this pins is not used but here we can select the mux function as RTP_nENA and set the RTP_nENA as GIO and output.
but RTP peripheral is in power down mode.
do we need to make EMIF_ADDR[]19]/RTP_nENA as output and drive low by removing RTP from power down mode ?
