I am using an HCS08QB4. I have switch inputs on PTB0-3 and PTB5-7. PTB0-3 and PTB5 are working fine, but PTB6-7 are always reading 0. I have set PTBDD and PTBPE. The two non-working inputs are labelled PTB7/EXTAL and PTB6/XTAL. I am not using an external crystal, but how does the chip know this to use the port pins?
Added p/n to subject.