•- TF1, TF0 : Overflow flags for Timer 1 and Timer 0. *
-- TR1,
TR0 : Run control
bits for Timer 1 and Timer 0. *
Set
to run, reset to hold.
•
•- IE1,
IE0 : Edge flag for
external interrupts 1 and 0.
• Set by interrupt edge, cleared when interrupt is
processed.
•- IT1,
IT0 : Type bit for
external interrupts.
• Set for falling edge
interrupts, reset for 0 level interrupts.
•
•* =
related to counter/timer operation