Hi… Thank you for reading.
I am experimenting with some Texas PCF8574's and a pic (16f688). All is good.
My questions;
My outputs are all sinking…i.e. 0's. Is there a way of outputting 1's (Source) when true without using external transistor ?
Although I have managed to read and write to and from the device…. can I split the 8 bits. 4 read and 4 write for example.
Do I aways have to write a 1 to the inputs before a read.
Thank you for reading and understanding.
Andy
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