參數(shù)資料
型號: PSD501B1
英文描述: PSD5XX/ZPSD5XX FAMILY FIELD-PROGRAMMABLE MICROCONTROLLER PERIPHERALS
中文描述: PSD5XX/ZPSD5XX家庭領(lǐng)域,可編程微控制器外設(shè)
文件頁數(shù): 102/153頁
文件大?。?/td> 1036K
代理商: PSD501B1
PSD5XX Famly
99
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Sense7
Sense6
Sense5
Sense4
Sense3
Sense2
Sense1
Sense0
Interrupt Operation
(cont.)
Interrupt Edge/Level Select Register
Bits sense 0
...
sense 7 correspond to interrupt 0
...
interrupt 7.
When these bits are set to
1 = LEVEL sensitive
0 = EDGE sensitive (positive edge)
At RESET these bits initialize as 0 i.e., all interrupts come up as Edge sensitive.
Interrupt Read Clear Register
This is a read only register. Reading this register during initialization clears all the pending
edge sensitive interrupts.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
ir 7
ir 6
ir 5
ir 4
ir 3
ir 2
ir 1
ir 0
Interrupt Request Latch Register
Bits ir 0...ir 7 correspond to interrupt 0 ... interrupt 7.
When any of these bits are set by the interrupt controller to a “1”, the corresponding
Interrupt is pending service.
The MCU can read the interrupt request latch which shows the status of all interrupts. The
entire interrupt request latch can be cleared by reading the Interrupt Read Clear Register,
but Level sensitive interrupts cannot be cleared.
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
*
*
*
*
*
vect 2
vect 1
vect 0
NOTE:
*
= Reserved for future use, bits set to zero.
Interrupt Priority Status Register
The value of these 3 bits (vect2, vect1 and vect0) indicates the highest priority of the
interrupt to be serviced among multiple interrupts pending. Refer to the table above for
priorities of various interrupts. Reading this register clears the highest pending interrupt.
Interrupt
Controller
(Cont.)
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