cop8sac7 National Semiconductor Corporation, cop8sac7 Datasheet - Page 27

• Manufacturer Part Number: cop8sac7
• Description: 8-bit Cmos Rom Based And One-time Programmable Otp Microcontroller With 1k To 4k Memory, Power On Reset, And Very Small Packaging
• Manufacturer: National Semiconductor Corporation

9.0 Interrupts
9.1 INTRODUCTION
The device supports eight vectored interrupts. Interrupt
sources include Timer 1, Timer T0, 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.
FIGURE 21. Interrupt Block Diagram
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The Software trap has the highest priority while the default
VIS has the lowest priority.
Each of the six maskable inputs has a fixed arbitration
ranking and vector.
Figure 21 shows the Interrupt Block Diagram.
DS012838-28
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