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參數(shù)資料
| 型號： | S1C6S460D |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, MROM, 2 MHz, MICROCONTROLLER, UUC124 |
| 封裝： | 4.69 X 4.68 MM, DIE-124 |
| 文件頁數(shù)： | 93/107頁 |
| 文件大?。?/td> | 788K |
| 代理商： | S1C6S460D |
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78
EPSON
S1C6S460 TECHNICAL MANUAL
CHAPTER 11: INTERRUPT AND HALT
(8) If an interrupt occurs while the CPU is processing some other interrupt request of which the priority is
lower than the new one but the CPU has not fetched the interrupt vector, the CPU may shift to a
vector address (one of among 102H, 104H, 106H, 10AH and 10EH) that is different from the new
interrupt.
Therefore, make sure the interrupt factor flag has been set immediately after the branch instruction
stored in the vector address is executed and quit the interrupt processing if it has not been set.
Furthermore, place a branch instruction for executing the interrupt processing routine in the vector
address 10EH because the CPU may shift to that address. By setting the start address of the program-
mable timer interrupt processing routine as the branch destination, the priority level by hardware can
be maintained.
If the program does not have the individual processing routine for each interrupt (for example, in the
case of all interrupts using the same processing routine in which the type of interrupt is judged by
reading the interrupt flags, or in the case of the main routine checking all the interrupt flags by
branching the flow the RET instruction stored in all the vector address), place the instruction the same
as the other interrupt vectors in address 10EH.
When the interrupt function is not used, it is not necessary to pay attention to the above mentioned
precautions.
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