Rabbit 6000 User’s Manual
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90
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
–
0x070. They can be set as Priority 1, 2, or 3
in the appropriate I
x
CR.
Table 7-1. Rabbit 6000 Interrupt Vectors
Vector
Register
Pins
Interrupt 0
I0CR
PD0, PE0, PE4
Interrupt 1
I1CR
PD1, PE1, PE5
Interrupt 2
I2CR
PF0–PF7, PG0–PG7
Interrupt 3
I3CR
PF0–PF7, PG0–PG7
Interrupt 4
I4CR
PF0–PF7, PG0–PG7
Interrupt 5
I5CR
PF0–PF7, PG0–PG7
Interrupt 6
I6CR
PF0–PF7, PG0–PG7
Interrupt 6
I7CR
PF0–PF7, PG0–PG7
Содержание 6000
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