Rainbow Electronics AT89C5122 - Manual (Page 168)

168
AT8xC5122/23
4202E–SCR–06/06
Reset Value = XXXX X000b (Not bit addressable)
Table 105. Interrupt Priority High Register 1 - IPH1 (B3h) for AT8xC5122
7 6 5 4 3 2 1 0
- PUSBH - - PSCIH -
Bit
Number
Bit
Mnemonic Description
7 -
Reserved
The value read from this bit is indeterminate. Do not change this bit.
6 PUSBH
USB Interrupt Priotity High bit
PUSBH
PUSBL Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest
5-4 -
Reserved
The value read from this bit is indeterminate. Do not change these bits.
3 PSCIH
SCI Interrupt Priority High bit
PSCIH PSCIL Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest
2 PSPIH
SPI Interrupt Priority High bit
PSPIH PSPIL Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest
1 -
Reserved
The value read from this bit is indeterminate. Do not change this bit.
0 PKBH
Keyboard Interrupt Priority High bit
PKBDH PKBDL Priority Level
0 0 Lowest
0 1
1 0
1 1 Highest