參數(shù)資料
型號(hào)： 8XC196LX
英文描述： 8XC196Lx - 8XC196Lx Supplement to 8X196Kx. 8X196Jx. 87C196CA User＇s Manual
中文描述： 8XC196Lx - 8XC196Lx補(bǔ)編8X196Kx。 8X196Jx。 87C196CA用戶手冊(cè)
文件頁數(shù)： 64/136頁
文件大?。?/td> 659K
代理商： 8XC196LX
8XC196LXSUPPLEMENT
7-6
7.1.3
EPA Interrupt Priority Vector Register
Figure 7-7 illustrates the EPA interrupt priority vector (EPAIPV) register for the 8XC196L
x
mi-
crocontroller family.
EPAIPV
Address:
Reset State:
1FA8H
00H
When an EPAx interrupt occurs, the EPA interrupt priority vector (EPAIPV) register contains a number
that identifies the highest priority, active, multiplexed interrupt source (see Table 7-2).
EPAIPV allows software to branch via the TIJMP instruction to the correct interrupt service routine
when EPAxis activated. Reading EPAIPV clears the EPA pending bit for the interrupt associated with
the value in EPAIPV. When all the EPA pending bits are cleared, the EPAxpending bit is also cleared.
7
0
—
—
—
PV4
PV3
PV2
PV1
PV0
Bit
Number
Bit
Mnemonic
Function
5:7
—
Reserved; for compatibility with future devices, write zeros to these bits.
4:0
PV4:0
Priority Vector
These bits contain a number from 01H to 14H corresponding to the
highest-priority active interrupt source. This value, when used with the
TIJMP instruction, allows software to branch to the correct interrupt
service routine.
Figure 7-7. EPA Interrupt Priority Vector Register (EPAIPV)
Table 7-2. EPA Interrupt Priority Vectors
Value
Interrupt
Value
Interrupt
Value
Interrupt
14H
—
0DH
OVR1
06H
OVR8
13H
—
0CH
OVR2
05H
OVR9
12H
EPA6
0BH
OVR3
04H
COMP0
11H
EPA7
0AH
—
03H
COMP1
10H
EPA8
09H
—
02H
OVRTM1
0FH
EPA9
08H
—
01H
OVRTM2
0EH
OVR0
07H
—
00H
None
87C196LA, LB only; reserved on 83C196LD.
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