Dependencies; I/O Pins; Clocks; Interrupts - Rabbit 6000 User Manual

7.3 Dependencies

7.3.1 I/O Pins

External interrupts 0 and 1 can be enabled on pins PD0, PD1, PE0, PE1, PE4, and PE5. The remaining
interrupts can be enabled on any pin of Parallel Ports F or G. Each pin is associated with a particular inter-
rupt vector as shown in Table 7-1 below.

7.3.2 Clocks

The external interrupts are controlled by the peripheral clock. A pulse must be present for at least three
peripheral clock cycles to trigger an interrupt.

7.3.3 Interrupts

An external interrupt is generated whenever the selected edge occurs on an enabled pin. The interrupt
request is automatically cleared when the interrupt is handled.
The external interrupt vectors are in the EIR at offsets 0x000
in the appropriate IxCR.
Rabbit 6000 User's Manual
Table 7-1. Rabbit 6000 Interrupt Vectors
Vector Register
Interrupt 0 I0CR
Interrupt 1 I1CR
Interrupt 2 I2CR
Interrupt 3 I3CR
Interrupt 4 I4CR
Interrupt 5 I5CR
Interrupt 6 I6CR
Interrupt 6 I7CR
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Pins
PD0, PE0, PE4
PD1, PE1, PE5
PF0–PF7, PG0–PG7
PF0–PF7, PG0–PG7
PF0–PF7, PG0–PG7
PF0–PF7, PG0–PG7
PF0–PF7, PG0–PG7
PF0–PF7, PG0–PG7
0x070. They can be set as Priority 1, 2, or 3
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