HT66F005 datasheet(71/109 Pages) HOLTEK

71 / 109 page

Rev. 1.30

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Rev. 1.30

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HT66F005/HT66F006

Cost-Effective A/D Flash MCU with EEPROM

HT66F005/HT66F006

Cost-Effective A/D Flash MCU with EEPROM

Analog to Digital Converter

Theneedtointerfacetorealworldanalogsignalsisacommonrequirementformanyelectronic

systems.However,toproperlyprocessthesesignalsbyamicrocontroller,theymustfirstbe

convertedintodigitalsignalsbyA/Dconverters.ByintegratingtheA/Dconversionelectronic

circuitryintothemicrocontroller,theneedforexternalcomponentsisreducedsignificantlywiththe

correspondingfollow-onbenefitsoflowercostsandreducedcomponentspacerequirements.

A/D Overview

Thedevicescontainamulti-channelanalogtodigitalconverterwhichcandirectlyinterfaceto

externalanalogsignals,suchasthatfromsensorsorothercontrolsignalsandconvertthesesignals

directlyintoa12-bitdigitalvalue.

Part No.

Input Channels

A/D Channel Select Bits

Input Pins

HT66F005/HT66F006

�CS4� �CS1~�CS0

�N0~�N3

TheaccompanyingblockdiagramshowstheoverallinternalstructureoftheA/Dconverter,together

withitsassociatedregisters.

A/ D Co nv er te r

PA0 /A N0

PA1 /A N1

PA2 /A N2

PA3 /A N3

A/ D Re fe re nc e Vo lt ag e

A DRL

A DRH

A/ D Da ta

Re gi st er s

V1 25 EN

ST AR T EO CB AD OF F

V SS

PA 1/ VR EF

A DCK 2~ AD CK 0

f SY S

AC E3 ~A CE 0

AC S4 , AC S1 ~A CS 0

1. 25V

A/ D Cl oc k

V DD

AD OF F

Bi t

VR EF S

Bi t

A DRF S

bi t

¸ 2 N

(N =0 ~6 )

A/D Converter Structure

A/D Converter Register Description

OveralloperationoftheA/Dconverteriscontrolledusingfiveregisters.Areadonlyregisterpair

existstostoretheADCdata12-bitvalue.Theremainingthreeregistersarecontrolregisterswhich

setuptheoperatingandcontrolfunctionoftheA/Dconverter.

Bit

�DRL(�DRFS=0)

D�

—

�DRL(�DRFS=1)

D�

�DRH(�DRFS=0)

D11

D10

D�

�DRH(�DRFS=1)

—

D11

D10

�DCR0

ST�RT

EOCB

�DOFF �DRFS

—

�CS1

�CS0

�DCR1

�CS4

V1�5EN

—

VREFS

—

�DCK� �DCK1 �DCK0

�CER

—

�CE3

�CE�

�CE1

�CE0

A/D Converter Register List

HT66F005 Datasheet(PDF) 71 Page - Holtek Semiconductor Inc

HT66F005 Datasheet(HTML) 71 Page - Holtek Semiconductor Inc

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