cop888eb National Semiconductor Corporation, cop888eb Datasheet - Page 37

• Manufacturer Part Number: cop888eb
• Description: 8-bit Cmos Rom Based Microcontrollers With 8k Memory, Can Interface, 8-bit A/d, And Usart
• Manufacturer: National Semiconductor Corporation

Frame Formats
Interrupts
INTRODUCTION
Each device supports fourteen vectored interrupts. Interrupt
sources include Timer 0, Timer 1, Timer 2, Timer 3, Port L
Wakeup, Software Trap, MICROWIRE/PLUS, and External
Input.
All interrupts force a branch to location 00FF Hex in program
memory. The VIS instruction may be used to vector to the
appropriate service routine from location 00FF Hex.
(Continued)
FIGURE 29. Resynchronization 1
FIGURE 30. Resynchronization 2
37
The Software trap has the highest priority while the default
VIS has the lowest priority.
Each of the 14 maskable inputs has a fixed arbitration rank-
ing and vector.
Figure 31 shows the Interrupt Block Diagram.
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DS012837-35