/diy/ - Do It Yourself

i saw this guy add an interlock feature to the IR2110 gate driver, so HI and LOW inputs to the IR2110 (from a microcontroller) can't simultaneously be turned on at once. pic related.

>74HC00N is a quad 2-input NAND gate that acts like a cross-locking circuit. A by-product of this schematic is inverting the signal, so we need to invert the actual input signal before. When IN HI is low (for example) – output pins 6 and 8 are in the high state, and pin 6 drives IR2110 ENABLE HI input. Simultaneously, pin 8 activates the T2 transistor, which pulls down ENABLE LOW line, which protects this line from unauthorized activation.

isn't this a bad idea since it's essentially shorting a GPIO straight to ground if HI and LOW are both enabled?