C8051F045 View Datasheet(PDF) - Silicon Laboratories

Part Name

Description

Manufacturer

C8051F045

Mixed Signal ISP Flash MCU Family

Silicon Laboratories 

C8051F040/1/2/3/4/5/6/7

SFR Definition 11.1. CPTnCN: Comparator 0, 1, and 2 Control

R/W

R

R/W

R/W

R/W

R/W

R/W

R/W

Reset Value

CPnEN CPnOUT CPnRIF CPnFIF CPnHYP1 CPnHYP0 CPnHYN1 CPnHYN0 00000000

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

SFR Address: CPT0CN: 0x88; CPT1CN: 0x88; CPT2CN: 0x88

SFR Pages: CPT0CN:page 1;CPT1CN:page 2; CPT2CN:page 3

Bit7:

Bit6:

Bit5:

Bit4:

Bits3-2:

Bits1-0:

CPnEN: Comparator Enable Bit. (Please see note below.)

0: Comparator Disabled.

1: Comparator Enabled.

CPnOUT: Comparator Output State Flag.

0: Voltage on CPn+ < CPn–.

1: Voltage on CPn+ > CPn–.

CPnRIF: Comparator Rising-Edge Interrupt Flag.

0: No Comparator Rising Edge Interrupt has occurred since this flag was last cleared.

1: Comparator Rising Edge Interrupt has occurred. Must be cleared by software.

CPnFIF: Comparator Falling-Edge Interrupt Flag.

0: No Comparator Falling-Edge Interrupt has occurred since this flag was last cleared.

1: Comparator Falling-Edge Interrupt has occurred. Must be cleared by software.

CPnHYP1-0: Comparator Positive Hysteresis Control Bits.

00: Positive Hysteresis Disabled.

01: Positive Hysteresis = 5 mV.

10: Positive Hysteresis = 10 mV.

11: Positive Hysteresis = 20 mV.

CPnHYN1-0: Comparator Negative Hysteresis Control Bits.

00: Negative Hysteresis Disabled.

01: Negative Hysteresis = 5 mV.

10: Negative Hysteresis = 10 mV.

11: Negative Hysteresis = 20 mV.

NOTE: Upon enabling a comparator, the output of the comparator is not immediately valid. Before

using a comparator as an interrupt or reset source, software should wait for a minimum of

the specified “Power-up time” as specified in Table 11.1, “Comparator Electrical Characteris-

tics,” on page 126.

124

Rev. 1.5

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