at89c51ac3-s3sim ATMEL Corporation, at89c51ac3-s3sim Datasheet - Page 119

• Manufacturer Part Number: at89c51ac3-s3sim
• Description: At89c51ac3 Enhanced 8-bit Microcontroller With 64kb Flash Memory
• Manufacturer: ATMEL Corporation

4383D–8051–02/08
Table 69. IPL0 Register
IPH0 (B7h)
Interrupt High Priority Register
Reset Value = X000 0000b
Number
Bit
7
-
7
6
5
4
3
2
1
0
Mnemonic Description
PPCH
PPCH
PT2H
PT1H
PX1H
PT0H
PX0H
PSH
Bit
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA Interrupt Priority Level Most Significant bit
PPCH PPC
0
0
1
1
Timer 2 Overflow Interrupt High Priority bit
PT2H PT2
0
0
1
1
Serial Port High Priority bit
PSH
0
0
1
1
Timer 1 Overflow Interrupt High Priority bit
PT1H PT1
0
0
1
1
External Interrupt 1 High Priority bit
PX1H PX1
0
0
1
1
Timer 0 Overflow Interrupt High Priority bit
PT0H PT0
0
0
1
1
External Interrupt 0 high priority bit
PX0H PX0
0
0
1
1
PT2H
5
PS
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
PSH
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
4
PT1H
3
PX1H
2
PT0H
1
PX0H
0
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