Rainbow Electronics AT89C5122 - Manual (Page 165)

165
AT8xC5122/23
4202E–SCR–06/06
Reset Value = X000 0000b (Not bit addressable)
Table 102. Interrupt Priority High Register 0 - IPH0 (B7h)
7 6 5 4 3 2 1 0
- - - PSH PT1H PX1H PT0H PX0H
Bit
Number
Bit
Mnemonic Description
7 - 5 -
Reserved
The value read from this bit is indeterminate. Do not change these bits.
4 PSH
Serial port Priority High bit
PSH PSL Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest
3 PT1H
Timer 1 overflow interrupt Priority High bit
PT1H PT1L Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest
2 PX1H
External interrupt 1 Priority High bit
PX1H PX1L Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest
1 PT0H
Timer 0 overflow interrupt Priority High bit
PT0H PT0L Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest
0 PX0H
External interrupt 0 Priority High bit
PX0H PX0L Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest