Delete comment from: Ken Shirriff's blog

Ken Shirriff said...

F.Ulivi: yes, I believe the pad-like thing is a large capacitor. The Nanoprocessor requires the Vgg power pin to go high a bit after the other power supplies. This causes the internal reset signal to be generated, and the capacitor provides the delay as you suggested. This approach avoids using a separate pin for reset, but makes the power supply design more complex.

I'm not entirely about the structures on the input pins. My guess is current-limiting resistors.

Sep 20, 2020, 12:54:18 PM

Posted to HP Nanoprocessor part II: Reverse-engineering the circuits from the masks