C8051F85X86X Datasheet, PDF (139/290 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

19.1. External Interrupt Control Registers
C8051F85x/86x
Register 19.1. IT01CF: INT0/INT1 Configuration
Bit
7
Name IN1PL
Type
RW
Reset
0
SFR Address: 0xE4
Bit
Name
7
IN1PL
6:4
IN1SL
3
IN0PL
2:0
IN0SL
6
5
4
3
2
1
0
IN1SL
IN0PL
IN0SL
RW
RW
RW
0
0
0
0
0
0
1
Table 19.1. IT01CF Register Bit Descriptions
Function
INT1 Polarity.
0: INT1 input is active low.
1: INT1 input is active high.
INT1 Port Pin Selection Bits.
These bits select which Port pin is assigned to INT1. This pin assignment is independent
of the Crossbar; INT1 will monitor the assigned Port pin without disturbing the peripheral
that has been assigned the Port pin via the Crossbar. The Crossbar will not assign the
Port pin to a peripheral if it is configured to skip the selected pin.
000: Select P0.0
001: Select P0.1
010: Select P0.2
011: Select P0.3
100: Select P0.4
101: Select P0.5
110: Select P0.6
111: Select P0.7
INT0 Polarity.
0: INT0 input is active low.
1: INT0 input is active high.
INT0 Port Pin Selection Bits.
These bits select which Port pin is assigned to INT0. This pin assignment is independent
of the Crossbar; INT0 will monitor the assigned Port pin without disturbing the peripheral
that has been assigned the Port pin via the Crossbar. The Crossbar will not assign the
Port pin to a peripheral if it is configured to skip the selected pin.
000: Select P0.0
001: Select P0.1
010: Select P0.2
011: Select P0.3
100: Select P0.4
101: Select P0.5
110: Select P0.6
111: Select P0.7
Preliminary Rev 0.6
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