668-0011 Rabbit Semiconductor, 668-0011 Datasheet - Page 232

• Manufacturer Part Number: 668-0011
• Description: IC MPU RABIT3000A 55.5MHZ128LQFP
• Manufacturer: Rabbit Semiconductor

Specifications of 668-0011

• 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: 316-1043

26.3.7 Handling Interrupts in the System/User Mode
Interrupts, RST s, SYSCALL , and SCALL all enter the System Mode automatically. There
will be times, however, that an interrupt should be handled in the User Mode. The solution
to this is for System Mode interrupt vector to reenter the User Mode before calling the
User Mode interrupt handler. An example of both system and user interrupt handling is
shown in Figure 26-4.
When enabled for User Mode access, a peripheral interrupt (if it is capable of generating
an interrupt) can only be requested at Priority 2 or 1.
Figure 26-4. Interrupt Handing in the System/User Mode
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Rabbit 3000 Microprocessor User’s Manual