Manual

97
AT89C5131
4136A–USB–03/03
Table 70. IPH1 Register
IPH1 - Interrupt Priority High Register (B3h)
Reset Value = XXXX X000b
Not bit addressable
7 6 5 4 3 2 1 0
- - - - - PSPIH - PKBH
Bit
Number
Bit
Mnemonic Description
7-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
6PUSBH
USB Interrupt Priority High bit
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-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
3-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
2PSPIH
SPI Interrupt Priority High bit
SPIH
SPIL Priority Level
0 0 Lowest
01
10
1 1 Highest
1-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
0PKBH
Keyboard Interrupt Priority High bit
KBDH
KBDL Priority Level
0 0 Lowest
01
10
1 1 Highest