參數資料
型號: MC68HC05L16CFU
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP80
封裝: PLASTIC, QFP-80
文件頁數: 83/146頁
文件大?。?/td> 852K
代理商: MC68HC05L16CFU
Interrupts
MC68HC05L16 MC68HC705L16 Data Sheet, Rev. 4.1
Freescale Semiconductor
41
Figure 4-2 shows an example of IRQ1 interrupt. In this case, the interrupt occurs after execution the
instruction following the instruction which sets IRQ1E bit. The similar action occurs against IRQ2 and KWI
interrupts.
Figure 4-2. IRQ Timing Delay
This problem can be solved by using a software patch like Figure 4-3. A similar procedure could be used
for IRQ2 or KWI.
Figure 4-3. Software Patch for IRQ1
4.2.4 Timer 1 Interrupt
Three timer 1 interrupts (TOI, ICI, and OC1I) share the same interrupt vector at $FFF6 and $FFF7. See
4.2.5 Timer 2 Interrupt
Two timer 2 interrupts (TI2I and OC2I) share the same interrupt vector at $FFF4 and $FFF5. See 9.3.1
4.2.6 SSPI Interrupt
The SSPI transfer complete interrupt uses the vector at $FFF2 and $FFF3. See Chapter 8 Simple Serial
4.2.7 Timebase Interrupt
The timebase interrupt uses the vector at $FFF0 and $FFF1. See 7.5 Timebase.
CLI
BSET IRQ1E, INTCR
LDA
#$55
.
Interrupt occurs after this instruction
IRQ1 interrupt pending
CLI
BSET IRQ1E, INTCR
NOP
LDA
#$55
.
Interrupt occurs after this instruction
IRQ1 interrupt pending
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