I'm more getting curious than anything else!
Next to the 74hct139 is a 74hct00e which is a NAND gate.
Output y1 of the nand drives one of the inputs of the 139. From 2 processor pins?? (24&28)
What is the logic behind using 2 pins to one pin on a device intended to multiply outputs?
I know I've missed something
Cheers Geoff
Next to the 74hct139 is a 74hct00e which is a NAND gate.
Output y1 of the nand drives one of the inputs of the 139. From 2 processor pins?? (24&28)
What is the logic behind using 2 pins to one pin on a device intended to multiply outputs?
I know I've missed something
Cheers Geoff