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ManualsBrandsAtmel Manuals8051 Microcontrollers8051 CISC Low Power, High Performance CMOS Microcontroller 8bit 16KB PDIP
61626364656667686970
61
AT89C51RB2/RC2
4180D–8051–06/05
Table 48. IPL1 Register
IPL1 - Interrupt Priority Register (B2h)
Reset Value = XXXX X000b
Bit addressable
76543210
-----SPIL-KBDL
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-
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.
2 SPIL
SPI Interrupt Priority Bit
see SPIH for priority level.
1-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
0 KBDL
Keyboard Interrupt Priority Bit
see KBDH for priority level.