Rainbow Electronics T89C5121 - Manual (Page 53)

53
A/T8xC5121
4164G–SCR–07/06
Table 36. IPL0 Register
Reset Value = XXX0 0000b
Bit addressable
7 6 5 4 3 2 1 0
- - - PSL PT1L PX1L PT0L PX0L
Bit
Number
Bit
Mnemonic Description
7 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
5 -
Reserved
The value read from this bit is indeterminate. Do not set this bit.
4 PSL
Serial port Priority bit
Refer to PSH for priority level.
3 PT1L
Timer 1 overflow interrupt Priority bit
Refer to PT1H for priority level.
2 PX1L
External interrupt 1 Priority bit
Refer to PX1H for priority level.
1 PT0L
Timer 0 overflow interrupt Priority bit
Refer to PT0H for priority level.
0 PX0L
External interrupt 0 Priority bit
Refer to PX0H for priority level.