參數(shù)資料
型號: M30220FCGP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 10 MHz, MICROCONTROLLER, PQFP144
封裝: 20 X 20 MM, 0.50 MM PITCH, PLASTIC, LQFP-144
文件頁數(shù): 93/161頁
文件大小: 0K
代理商: M30220FCGP
Interrupt
Mitsubishi microcomputers
M30220 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
37
Table 1.10.4. Interrupt levels enabled according
to the contents of the IPL
Table 1.10.3. Settings of interrupt priority
levels
Interrupt priority
level select bit
Interrupt priority
level
Priority
order
0
1
0
1
0
1
0
1
0
1
0
1
Level 0 (interrupt disabled)
Level 1
Level 2
Level 3
Level 4
Level 5
Level 6
Level 7
Low
High
b2 b1 b0
Enabled interrupt priority levels
0
1
0
1
0
1
0
1
0
1
0
1
Interrupt levels 1 and above are enabled
Interrupt levels 2 and above are enabled
Interrupt levels 3 and above are enabled
Interrupt levels 4 and above are enabled
Interrupt levels 5 and above are enabled
Interrupt levels 6 and above are enabled
Interrupt levels 7 and above are enabled
All maskable interrupts are disabled
IPL2 IPL1 IPL0
IPL
Interrupt Priority Level Select Bit and Processor Interrupt Priority Level (IPL)
Set the interrupt priority level using the interrupt priority level select bit, which is one of the component bits
of the interrupt control register. When an interrupt request occurs, the interrupt priority level is compared
with the IPL. The interrupt is enabled only when the priority level of the interrupt is higher than the IPL.
Therefore, setting the interrupt priority level to “0” disables the interrupt.
Table 1.10.3 shows the settings of interrupt priority levels and Table 1.10.4 shows the interrupt levels
enabled, according to the contents of the IPL.
The following are conditions under which an interrupt is accepted:
interrupt enable flag (I flag) = 1
interrupt request bit = 1
interrupt priority level > IPL
The interrupt enable flag (I flag), the interrupt request bit, the interrupt priority select bit, and the IPL are
independent, and they are not affected by one another.
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