668-0010 Rabbit Semiconductor, 668-0010 Datasheet - Page 73
668-0010
Manufacturer Part Number
668-0010
Description
IC MPU RABIT3000 55.5MHZ 128LQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0011.pdf
(312 pages)
Specifications of 668-0010
Rohs Status
RoHS non-compliant
Processor Type
Rabbit 3000 8-Bit
Speed
55.5MHz
Voltage
2.5V, 2.7V, 3V, 3.3V
Mounting Type
Surface Mount
Package / Case
128-LQFP
Features
-
Other names
316-1016
- Current page: 73 of 312
- Download datasheet (2Mb)
7.4.1 Example ISR
A sample interrupt handler is shown below.
7.4.2 Expand Interrupts for Additional Peripheral Devices
When you need to expand the number of interrupts for additional peripheral devices, use
the interrupt routine to dispatch interrupts to other virtual interrupt routines. 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 processor can determine which
devices are requesting an interrupt.
The following code shows how the interrupt service routines can be written.
Chapter 7 External Interrupts
extInt_isr::
; respond to external interrupt here
; interrupt is automatically cleared by interrupt acknowledge
ipres
ret
; External interrupt Routine #0 (programmed priority could be 3)
int2:
; insert body of interrupt routine here
;
PUSH IP
IPSET 1
POP IP
IPRES
RET
; save interrupt priority
; set to priority really desired (1, 2, etc.)
; get back entry priority
; restore interrupted routine’s priority
; return from interrupt
63
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