T89C51CC02 Atmel, T89C51CC02 Datasheet - Page 127

• Manufacturer Part Number: T89C51CC02
• Description: 8-Bit MCU
• Manufacturer: Atmel

IPH0 (B7h)
Interrupt High Priority Register
Reset Value: X000 0000b
Rev.A - May 17, 2001
Bit Number Bit Mnemonic
7
7
6
5
4
3
2
1
0
-
PPCH
PPCH
PX1H
PX0H
PT2H
PT1H
PT0H
PSH
6
-
Reserved
EWC-PCA Counter Interrupt Priority level most significant bit
Timer 2 overflow interrupt High Priority bit
Serial port High Priority bit
Timer 1 overflow interrupt High Priority bit
External interrupt 1 High Priority bit
Timer 0 overflow interrupt High Priority bit
External interrupt 0 high priority bit
The value read from this bit is indeterminate. Do not set this bit.
PT2H
5
PPCH PPC
0
0
1
1
PT2H
0
0
1
1
PSH
0
0
1
1
PT1H
0
0
1
1
PX1H PX1
0
0
1
1
PT0H
0
0
1
1
PX0H PX0
0
0
1
1
Figure 131. IPL0 Register
Preliminary
0
1
0
1
PT2
0
1
0
1
PS
0
1
0
1
PT1
0
1
0
1
0
1
0
1
PT0
0
1
0
1
0
1
0
1
PSH
4
Priority level
Lowest
Highest priority
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
PT1H
3
Description
PX1H
2
T89C51CC02
PT0H
1
PX0H
0
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