Rainbow Electronics T89C51CC01 - Manual (Page 129)

129
T89C51CC01
Rev. D – 17-Dec-01
Table 91. IPL0 Register
IPL0 (S:B8h)
Interrupt Enable Register
Reset Value: X000 0000b
bit addressable
7 6 5 4 3 2 1 0
- 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
5 PT2
Timer 2 overflow interrupt Priority bit
Refer to PT2H for priority level.
4 PS
Serial port Priority bit
Refer to PSH for priority level.
3 PT1
Timer 1 overflow interrupt Priority bit
Refer to PT1H for priority level.
2 PX1
External interrupt 1 Priority bit
Refer to PX1H for priority level.
1 PT0
Timer 0 overflow interrupt Priority bit
Refer to PT0H for priority level.
0 PX0
External interrupt 0 Priority bit
Refer to PX0H for priority level.