TS87C51RD2-VCKB 查看數據表（PDF） - Atmel Corporation
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TS87C51RD2-VCKB Datasheet PDF : 74 Pages
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IPH - Interrupt Priority High Register (B7h)
7
6
5
-
PPCH
PT2H
Table 21. IPH Register
4
3
PSH
PT1H
TS80C51RA2/RD2
TS83C51RB2/RC2/RD2
TS87C51RB2/RC2/RD2
2
PX1H
1
PT0H
0
PX0H
Bit
Number
7
6
Bit
Mnemonic
Description
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PPCH
PCA interrupt priority bit high.
PPCH
PPC Priority Level
0
0
Lowest
0
1
1
0
1
1
Highest
Timer 2 overflow interrupt Priority High bit
PT2H
PT2
Priority Level
5
PT2H
0
0
0
1
Lowest
1
0
1
1
Highest
Serial port Priority High bit
PSH
PS
Priority Level
4
PSH
0
0
0
1
Lowest
1
0
1
1
Highest
Timer 1 overflow interrupt Priority High bit
PT1H
PT1
Priority Level
3
PT1H
0
0
0
1
Lowest
1
0
1
1
Highest
External interrupt 1 Priority High bit
PX1H
PX1
Priority Level
2
PX1H
0
0
0
1
Lowest
1
0
1
1
Highest
Timer 0 overflow interrupt Priority High bit
PT0H
PT0
Priority Level
1
PT0H
0
0
0
1
Lowest
1
0
1
1
Highest
External interrupt 0 Priority High bit
PX0H
PX0
Priority Level
0
PX0H
0
0
0
1
Lowest
1
0
1
1
Highest
Reset Value = X000 0000b
Not bit addressable
Rev. C - 06 March, 2001
43
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