668-0003-C Rabbit Semiconductor, 668-0003-C Datasheet - Page 93
668-0003-C
Manufacturer Part Number
668-0003-C
Description
IC CPU RABBIT2000 30MHZ 100PQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0003.pdf
(228 pages)
Specifications of 668-0003-C
Rohs Status
RoHS non-compliant
Processor Type
Rabbit 2000 8-Bit
Speed
30MHz
Voltage
2.7V, 3V, 3.3V, 5V
Mounting Type
Surface Mount
Package / Case
100-MQFP, 100-PQFP
Features
-
Other names
316-1004
668-0003
668-0003
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Part Number:
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Manufacturer:
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7.9.2 Interrupt Vectors: INT0 - EIR,0x00/INT1 - EIR,0x08
When it is desired to expand the number of interrupts for additional peripheral devices, the
user should use the interrupt routine to dispatch interrupts to other virtual interrupt rou-
tines. Each additional interrupting device will have to signal the processor that it is
requesting an interrupt. A separate signal line is needed for each device so that the proces-
sor can determine which devices are requesting an interrupt.
The following code shows how the interrupt service routines can be written.
Chapter 7 Miscellaneous I/O Functions
; External interrupt Routine #1
int1:
;
; External interrupt Routine #0 (programmed priority could be 3)
int2:
; insert body of interrupt routine here
;
IPRES
RET
PUSH IP
IPSET 1
POP IP
IPRES
RET
; restore system priority
; return and ignore interrupt
; save interrupt priority
; set to priority really desired (1, 2, etc.)
; get back entry priority
; restore interrupted routine’s priority
; return from interrupt
87
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