Datasheet

MC68HC908QY4•MC68HC908QT4•MC68HC908QY2•MC68HC908QT2•MC68HC908QY1•MC68HC908QT1
32 General Description MOTOROLA
General Description
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1.7 Pin Function Priority
Table 1-3 is meant to resolve the priority if multiple functions are enabled
on a single pin.
NOTE: Upon reset all pins come up as input ports regardless of the priority table.
Table 1-3. Function Priority in Shared Pins
Pin Name Highest-to-Lowest Priority Sequence
PTA[0] AD0 → TCH0 → KBI[0] → PTA[0]
PTA[1] AD1 →TCH1 → KBI[1] → PTA[1]
PTA[2] IRQ
→ KBI[2] → PTA[2]
PTA[3] RST → KBI[3] → PTA[3]
PTA[4] OSC2 → AD2 → KBI[4] → PTA[4]
PTA[5] OSC1 → AD3 → KBI[5] → PTA[5]