LPC553x I3C PUR Signal availability

[mf89]

Hi,

the LPC553x MCU Features a Hardware I3C Peripheral. Is the "PUR" Pull Up resistor control Pin only available in the 100 Pin Package ?

If yes is there an alternative solution for the 64 and 48 Pin Package to handle external Pull Ups on SDA line ?

[Dezheng_Tang · Accepted solution]

Yes, only 100-pin package has PUR pin on external SDA pull-up, for smaller package, you have to configure a pin as GPIO and toggle it to control the external SDA pull-up. It's meant for a strong pull-up, not sure if it's always needed depending on your application.