Silicon Laboratories C8051F347 - Manual (Page 66)

C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
66 Rev. 1.3
SFR Definition 7.5. CPT1MX: Comparator1 MUX Selection
Bit7: UNUSED. Read = 0b, Write = don’t care.
Bits6–4: CMX1N2–CMX1N0: Comparator1 Negative Input MUX Select.
These bits select which Port pin is used as the Comparator1 negative input.
Bit3: UNUSED. Read = 0b, Write = don’t care.
Bits2–0: CMX1P1–CMX1P0: Comparator1 Positive Input MUX Select.
These bits select which Port pin is used as the Comparator1 positive input.
Note that the port pins used by the comparator depend on the package type (32-pin or 48-pin).
R/W R/W R/W R/W R/W R/W R/W R/W Reset Value
- CMX1N2 CMX1N1 CMX1N0 - CMX1P2 CMX1P1 CMX1P0 00000000
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 SFR Address:
0x9E
CMX1N2 CMX1N1 CMX1N0 Negative Input
(32-pin Package)
Negative Input
(48-pin Package)
0 0 0 P1.3 P2.3
0 0 1 P1.7 P3.1
0 1 0 P2.3 P4.0
0 1 1 P2.7 P4.6
1 0 0 P0.5 P1.2
CMX1P2 CMX1P1 CMX1P0 Positive Input
(32-pin Package)
Positive Input
(48-pin Package)
0 0 0 P1.2 P2.2
0 0 1 P1.6 P3.0
0 1 0 P2.2 P3.7
0 1 1 P2.6 P4.5
1 0 0 P0.4 P1.1