AT89C51RB2-RLTCM ATMEL [ATMEL Corporation], AT89C51RB2-RLTCM Datasheet - Page 57

• Manufacturer Part Number: AT89C51RB2-RLTCM
• Description: 8-bit Microcontroller with 16K/ 32K Bytes Flash
• Manufacturer: ATMEL [ATMEL Corporation]

4180B–8051–04/03
Table 46. IPH0 Register
IPH0 - Interrupt Priority High Register (B7h)
Reset Value = X000 0000b
Not bit addressable
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 High Bit
PPCH
0
0
1
1
Timer 2 Overflow Interrupt Priority High Bit
PT2H
0
0
1
1
Serial Port Priority High Bit
PSH
0
0
1
1
Timer 1 Overflow Interrupt Priority High Bit
PT1H
0
0
1
1
External Interrupt 1 Priority High Bit
PX1H
0
0
1
1
Timer 0 Overflow Interrupt Priority High Bit
PT0H
0
0
1
1
External Interrupt 0 Priority High Bit
PX0H
0
0
1
1
PT2H
5
PPCL
0
1
0
1
PT2L
0
1
0
1
PSL
0
1
0
1
PT1L
0
1
0
1
PX1L
0
1
0
1
PT0L
0
1
0
1
PX0L
0
1
0
1
PSH
Priority Level
Lowest
Highest
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
AT89C51RB2/RC2
PX1H
2
PT0H
1
PX0H
0
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