UCD9090 Unused Pins

Samuel Jaffe

Mastermind 25590 points

Hi E2E,

A customer was wondering what to do with the following unused pins:

GPIO_nn
MON_nn
PWM_n / GPI_n
GPIO_nn
TCK/GPIO
TDO/GPIO
TDI/GPIO
TMS_GPIO
PMBUS_ALERT

Which pins should be left floating, pulled up, pulled down, tied high, tied low...?

Thanks,

-Sam

over 8 years ago

0 Fery Feng over 8 years ago

TI__Intellectual 2270 points

Hi Samuel,

For the following Pin, you could just let them floating if you don't use them:
GPIO_nn
MON_nn
PWM_n / GPI_n
GPIO_nn
TCK/GPIO
TDO/GPIO
TDI/GPIO
TMS_GPIO

But for the PMBus_Alert Pin, you need to pull up to 3.3V with 4.7KΩ resisitor.

Thank you.

0 Samuel Jaffe over 8 years ago in reply to Fery Feng

TI__Mastermind 25590 points

Thanks for the clear answer : )

Power management

Power management forum

UCD9090 Unused Pins