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參數(shù)資料
| 型號： | M37546G4-XXXGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP32 |
| 封裝： | 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32 |
| 文件頁數(shù)： | 22/103頁 |
| 文件大小： | 1156K |
| 代理商： | M37546G4-XXXGP |
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REJ03B0160-0122 Rev.1.22 Mar 13, 2009
page 25 of 100
7546 Group
Interrupt Request Generation, Acceptance, and Handling
Interrupts have the following three phases.
(i) Interrupt Request Generation
An interrupt request is generated by an interrupt source (ex-
ternal interrupt signal input, timer underflow, etc.) and the
corresponding request bit is set to “1”.
(ii) Interrupt Request Acceptance
Based on the interrupt acceptance timing in each instruction
cycle, the interrupt control circuit determines acceptance con-
ditions (interrupt request bit, interrupt enable bit, and interrupt
disable flag) and interrupt priority levels for accepting interrupt
requests. When two or more interrupt requests are generated
simultaneously, the highest priority interrupt is accepted. The
value of the interrupt request bit for an unaccepted interrupt
remains the same and acceptance is determined at the next
interrupt acceptance timing point.
(iii) Handling of Accepted Interrupt Request
The accepted interrupt request is processed.
Fig. 22 shows the time up to execution in the interrupt processing
routine, and Fig. 23 shows the interrupt sequence.
Fig. 24 shows the timing of interrupt request generation, interrupt
request bit, and interrupt request acceptance.
Interrupt Handling Execution
When interrupt handling is executed, the following operations are
performed automatically.
(1) Once the currently executing instruction is completed, an in-
terrupt request is accepted.
(2) The contents of the program counters and the processor sta-
tus register at this point are pushed onto the stack area in
order from 1 to 3.
1.High-order bits of program counter (PCH)
2.Low-order bits of program counter (PCL)
3.Processor status register (PS)
(3) Concurrently with the push operation, the jump address of the
corresponding interrupt (the start address of the interrupt pro-
cessing routine) is transferred from the interrupt vector to the
program counter.
(4) The interrupt request bit for the corresponding interrupt is set
to “0”. Also, the interrupt disable flag is set to “1” and multiple
interrupts are disabled.
(5) The interrupt routine is executed.
(6) When the RTI instruction is executed, the contents of the reg-
isters pushed onto the stack area are popped off in the order
from 3 to 1. Then, the routine that was before running interrupt
processing resumes.
As described above, it is necessary to set the stack pointer and
the jump address in the vector area corresponding to each inter-
rupt to execute the interrupt processing routine.
Fig. 22 Time up to execution in interrupt routine
Main routine
Interrupt handling
routine
Interrupt request
generated
Interrupt request
acceptance
Interrupt routine
starts
Interrupt sequence
7 cycles
0 to 16* cycles
7 to 23 cycles
* When executing DIV instruction
Stack push
Vector fetch
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M37547G2-XXXFP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36 |
| M37547G4FP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36 |
| M37547G4-XXXFP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36 |
| M37547G4-XXXFP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO36 |
| M37548G2-XXXFP | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDSO20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37546G4-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37546G4-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37547G2FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M37547G2FP#U0 | 功能描述:MCU 2/5V 8KB 36-SSOP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:740/38000 標(biāo)準(zhǔn)包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI，I²C，UART/USART 外圍設(shè)備:POR，PWM，WDT 輸入/輸出數(shù):40 程序存儲器容量:- 程序存儲器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:A/D 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-LCC（J 形引線） 包裝:帶卷 (TR) |
| M37547G2-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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