mc68hc05l25 Freescale Semiconductor, Inc, mc68hc05l25 Datasheet - Page 47

• Manufacturer Part Number: mc68hc05l25
• Description: M68hc05 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Figure 6-5
instruction which sets the IRQE bit. A similar precaution is required for KWI interrupts.
This problem can be solved by using a software code as illustrated in
should be used for KWI.
Freescale Semiconductor
shows an example of an IRQ interrupt. In this case, the interrupt occurs after execution of the
.
.
CLI
BSET IRQE, INTCR
NOP
LDA
.
.
.
.
CLI
BSET IRQE, INTCR
LDA
.
.
.
#$55
#$55
Figure 6-6. Software Patch for IRQ
Figure 6-5. IRQ Timing Delay
MC68HC05L25 Data Sheet, Rev. 3.1
IRQ Interrupt pending
Interrupt occurs after this instruction
IRQ Interrupt pending
Interrupt occurs after this instruction
Figure
IRQ/KWI Software Consideration
6-6. A similar procedure
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