3 ms·
"Lots of current" in this case would only be about 20mA, generating heat that you can easily dissipate from just the surface of a 0201 resistor. I doubt many mi
by akiselev 8y ago
"Lots of current" in this case would only be about 20mA, generating heat that you can easily dissipate from just the surface of a 0201 resistor. I doubt many microprocessors have pins that can drive higher current than that.
Realistically, in order to drive it low you don't have to bring it down to 0V. Most 5V chips will stop registering logic high around 2.5-3.3V for example.
- dbcurtis 8y agoThese days 20mA is a "high current" I/O. When you do the math on an 88-pin package, 20mA * N active outputs gets big pretty fast. The max total I/O current can be found somewhere around page 987 of the data sheet... don't stop reading early... :) (edit: 88 I/O is a modest size microcontroller sort of chip)
- Dylan16807 8y agoI don't understand how this is relevant to holding a single pin low.
- 8note 8y agoit's even easier than the comment above suggests