Silicon Laboratories C8051F341, C8051F347 SFR Definition 7.5. CPT1MX Comparator1 MUX Selection

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

SFR Definition 7.5. CPT1MX: Comparator1 MUX Selection

R/W

R/W

R/W

R/W

R/W

R/W

R/W

R/W

-

CMX1N2

CMX1N1

CMX1N0

-

CMX1P2

CMX1P1

CMX1P0

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

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.

CMX1N2

CMX1N1

CMX1N0

Negative Input

Negative Input

(32-pin Package)

(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

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.

CMX1P2

CMX1P1

CMX1P0

Positive Input

Positive Input

(32-pin Package)

(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

Reset Value

00000000

SFR Address:

0x9E

Note that the port pins used by the comparator depend on the package type (32-pin or 48-pin).

66 Rev. 0.5