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參數(shù)資料
| 型號： | HD404449H |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | MROM, MICROCONTROLLER, PQFP80 |
| 封裝： | PLASTIC, QFP-80 |
| 文件頁數(shù)： | 13/33頁 |
| 文件大?。?/td> | 440K |
| 代理商： | HD404449H |
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HD404449 Series
18
An interrupt request occurs when the IF is set to 1 and the IM is set to 0. If the IE is 1 at that point, the
interrupt is processed. A priority programmable logic array (PLA) generates the vector address assigned to
that interrupt source.
The interrupt processing sequence is shown in figure 10 and an interrupt processing flowchart is shown in
figure 11. After an interrupt is acknowledged, the previous instruction is completed in the first cycle. The
IE is reset in the second cycle, the carry, status, and program counter values are pushed onto the stack
during the second and third cycles, and the program jumps to the vector address to execute the instruction
in the third cycle.
Program the JMPL instruction at each vector address, to branch the program to the start address of the
interrupt program, and reset the IF by a software instruction within the interrupt program.
Table 2
Vector Addresses and Interrupt Priorities
Reset/Interrupt
Priority
Vector Address
RESET,
STOPC*
—
$0000
INT
0
1
$0002
INT
1
2
$0004
Timer A
3
$0006
Timer B, INT
2
4
$0008
Timer C, INT
3
5
$000A
Timer D, A/D
6
$000C
Serial 1, Serial 2
7
$000E
Note:
* The
STOPC interrupt request is valid only in stop mode
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相關(guān)代理商/技術(shù)參數(shù) |
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| HD404449SERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
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| HD404458H | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers |
| HD404459 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:4-bit HMCS400-series microcomputers |
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