
164
AT89C51CC03
4182O–CAN–09/08
Table 112. IPL0 Register
IPL0 (S:B8h)
Interrupt Enable Register
Reset Value = X000 0000b
bit addressable
7654
3210
-
PPC
PT2
PS
PT1
PX1
PT0
PX0
Bit
Number
Bit
Mnemonic
Description
7-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6
PPC
PCA Interrupt Priority bit
Refer to PPCH for priority level
5PT2
Timer 2 Overflow Interrupt Priority bit
Refer to PT2H for priority level.
4PS
Serial Port Priority bit
Refer to PSH for priority level.
3PT1
Timer 1 Overflow Interrupt Priority bit
Refer to PT1H for priority level.
2PX1
External Interrupt 1 Priority bit
Refer to PX1H for priority level.
1PT0
Timer 0 Overflow Interrupt Priority bit
Refer to PT0H for priority level.
0PX0
External Interrupt 0 Priority bit
Refer to PX0H for priority level.