While emulation mode TRst pin is connected to vcc while for other mode TRst is pull down
1. Now as my application needs more GPIO I need to use the pins used for tdo,TDI,tms,tck. The pins can be used as GPIO only if TRst is pull down is it right?
2. However
I for the boot to flas mode I need to pullup gpii34 and tdo.
Thus these two pins cannot be used as GPIO am I right.
3. What should be pullup resister to be connected.
Hi Ashutosh,
Ashutosh Pailwan1 said:1. Now as my application needs more GPIO I need to use the pins used for tdo,TDI,tms,tck. The pins can be used as GPIO only if TRst is pull down is it right?
Yes!
Ashutosh Pailwan1 said:2. However
I for the boot to flas mode I need to pullup gpii34 and tdo.
Thus these two pins cannot be used as GPIO am I right.
Its always better to not fiddle with Boot pins even though you can use them as GPIO. In the above case while booting from flash GPIO34 has to be pulled up. Once flash boot up is done, you can use it as a GPIO.
Ashutosh Pailwan1 said:3. What should be pullup resister to be connected.
I guess, you're not referring C2000 launchpad schematics... 820E for pull-up.
C:\ti\controlSUITE\development_kits\C2000_LaunchPad\LAUNCHXL-F28027\HwDevPkg
If you're designing your own board please follow the basic launchpad design. This would help you in a hassle free process of board development.
Regards,
Gautam
