Silicon Laboratories C8051F340 Manuel d'utilisateur télécharger pdf (Page 63)

Rev. 0.5 63

C8051F340/1/2/3/4/5/6/7

SFR Definition 7.2. CPT0MX: Comparator0 MUX Selection

Bit7: UNUSED. Read = 0b, Write = don’t care.

Bits6–4: CMX0N2–CMX0N0: Comparator0 Negative Input MUX Select.

These bits select which Port pin is used as the Comparator0 negative input.

Bit3: UNUSED. Read = 0b, Write = don’t care.

Bits2–0: CMX0P2–CMX0P0: Comparator0 Positive Input MUX Select.

These bits select which Port pin is used as the Comparator0 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

- CMX0N2 CMX0N1 CMX0N0 - CMX0P2 CMX0P1 CMX0P0 00000000

Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 SFR Address:

0x9F

CMX0N1 CMX0N1 CMX0N0 Negative Input

(32-pin Package)

Negative Input

(48-pin Package)

0 0 0 P1.1 P2.1

0 0 1 P1.5 P2.6

0 1 0 P2.1 P3.5

0 1 1 P2.5 P4.4

1 0 0 P0.1 P0.4

CMX0P1 CMX0P1 CMX0P0 Positive Input

(32-pin Package)

Positive Input

(48-pin Package)

000 P1.0 P2.0

001 P1.4 P2.5

010 P2.0 P3.4

011 P2.4 P4.3

100 P0.0 P0.3

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Silicon Laboratories C8051F340 Manuel d'utilisateur Page 63