20-668-0003 Rabbit Semiconductor, 20-668-0003 Datasheet - Page 93

• Manufacturer Part Number: 20-668-0003
• Description: IC CPU RABBIT2000 30MHZ 100PQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 20-668-0003

• 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
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 30 MHz
• Operating Supply Voltage: 0 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 40
• Number Of Timers: 8 & 10 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 20-668-0003; 316-1062

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
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