HT45F5Q datasheet(79/114 Pages) HOLTEK

79 / 114 page

Rev. 1.10

De�e��e� 1�� 01�

Rev. 1.10

De�e��e� 1�� 01�

HT45F5Q

Charger Flash MCU

HT45F5Q

Charger Flash MCU

Programming Considerations

DuringmicrocontrolleroperationswheretheA/Dconverterisnotbeingused,theA/Dinternal

circuitrycanbeswitchedofftoreducepowerconsumption,byclearingtheENADCbitinthe

SADC0register.Whenthishappens,theinternalA/Dconvertercircuitswillnotconsumepower

irrespectiveofwhatanalogvoltageisappliedtotheirinputlines.IftheA/Dconverterinputlinesare

usedasnormalI/Os,thencaremustbetakenasiftheinputvoltageisnotatavalidlogiclevel,then

thismayleadtosomeincreaseinpowerconsumption.

A/D Transfer Function

Asthedevicecontainsa12-bitA/Dconverter,itsfull-scaleconverteddigitisedvalueisequalto

FFFH.Sincethefull-scaleanaloginputvalueisequaltotheVDDorVREFvoltage,thisgivesasingle

bitanaloginputvalueofVDDorVREFdividedby4096.

1LSB=(VDDorVREF)/4096

TheA/DConverterinputvoltagevaluecanbecalculatedusingthefollowingequation:

A/Dinputvoltage=A/Doutputdigitalvalue×(VDDorVREF)/4096

Thediagramshowstheidealtransferfunctionbetweentheanaloginputvalueandthedigitised

outputvaluefortheA/Dconverter.Exceptforthedigitisedzerovalue,thesubsequentdigitised

valueswillchangeatapoint0.5LSBbelowwheretheywouldchangewithouttheoffset,andthe

lastfullscaledigitisedvaluewillchangeatapoint1.5LSBbelowtheVDDorVREFlevel.

FF EH

(

)

A/ D Co nv er si on

Re su lt

FFFH

FF DH

03 H

02 H

01 H

0. 5 LS B

409 3 409 44 09 54 09 6

An al og I nputV ol t age

1. 5 LS B

V DD or V RE F

409 6

Ideal A/D Transfer Function

HT45F5Q Datasheet(PDF) 79 Page - Holtek Semiconductor Inc

HT45F5Q Datasheet(HTML) 79 Page - Holtek Semiconductor Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL