ETIC 2230 Guía de usuario descargar pdf (Pagina 116)

Rev. 1.10 116 November 14, 2014 Rev. 1.10 117 November 14, 2014

HT66FW2230

Wireless Charger A/D Flash 8-Bit MCU

Internal Reference Voltage – IVREF

G=2

Band gap

IVREF

To ADC V

REF

To ADC Input

Internal Reference Voltage Circuit

ThebandgapcircuitwillautomaticallyswitchonifeithertheLVRorLVDisenabledoriftheVREF

isenabled.

Demodulator & OCP Miscellaneous Control Register Description

TheDCMISCregisterisusedtocontroltheD/AVREFsourceselection,tostoretheoperational

amplieroutputstatusasalogicalconditionandtoselectthedemodulatorOPAinputsource.The

VREFCregisterisusedtocontrolVREFandtostoretheVREFOPAoutputstatus.VRACAListhe

VREFOPAcalibrationregister.

VREFC register

Bit 7 6 5 4 3 2 1 0

Name VREFEN — — — — — — VRAX

R/W R/W — — — — — — R

POR 0 — — — — — — 0

Bit7 VREFEN:VREFenablebit

0:Disable

1:Enable

Note:ThebandgapwillbeenabledifeithertheLVR,LVD,VBG(ADC)orVREFisenabled.

Bit0 VRAX:VREFOPAoutput,readonly.

VRACAL Register – VREF OPA calibration register

Bit 7 6 5 4 3 2 1 0

Name VRAOFM VRARS VRAOF5 VRAOF4 VRAOF3 VRAOF2 VRAOF1 VRAOF0

R/W R/W R/W R/W R/W R/W R/W R/W R/W

POR 0 0 1 0 0 0 0 0

Bit7 VRAOFM:Inputoffsetvoltagecancellationmodeornormaloperatingmodeselection

0:Normaloperatingmode

1:Inputoffsetvoltagecancellationmode

Bit6 VRARS:Inputoffsetvoltagecancellationreferenceselectionbit

0:Selectnegativeinputasthereferenceinput

1:Selectpositiveinputasthereferenceinput

Bit5~0 VRAOF5~VRAOF0:Comparatorinputoffsetvoltagecalibrationcontrol

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ETIC 2230 Guía de usuario Pagina 116