Motore di ricerca datesheet componenti elettronici |
|
HT46R0042 Scheda tecnica(PDF) 53 Page - Holtek Semiconductor Inc |
|
HT46R0042 Scheda tecnica(HTML) 53 Page - Holtek Semiconductor Inc |
53 / 83 page Rev. 1.00 5� ��to�e� ��� �01� Rev. 1.00 53 ��to�e� ��� �01� HT46R0042 Cost-Effective A/D 8-Bit OTP MCU HT46R0042 Cost-Effective A/D 8-Bit OTP MCU Programming Considerations Whenprogramming,thespecialattentionmustbegiventothePCR[7:0]bitsintheregister.Ifthese bitsareallclearedtozero,noexternalpinswillbeselectedforuseasA/Dinputpinsallowingthe pinstobeusedasnormalI/Opins.Whenthishappens,theinternalA/Dcircuitrywillbepower down.SettingtheADONBbithighhastheabilitytopowerdowntheinternalA/Dcircuitry,which maybeanimportantconsiderationinpowersensitiveapplications. A/D Transfer Function Asthedevicecontainsa12-bitA/Dconverter,itsfull-scaleconverteddigitisedvalueisequalto FFFH.Sincethefull-scaleanaloginputvalueisequaltotheVDDvoltage,thisgivesasinglebit analoginputvalueofVDDdividedby4096.Thediagramshowstheidealtransferfunctionbetween theanaloginputvalueandthedigitisedoutputvaluefortheA/Dconverter. Notethattoreducethequantisationerror,a0.5LSBoffsetisaddedtotheA/DConverterinput. Exceptforthedigitisedzerovalue,thesubsequentdigitisedvalueswillchangeatapoint0.5LSB belowwheretheywouldchangewithouttheoffset,andthelastfullscaledigitizedvaluewillchange atapoint1.5LSBbelowtheVDDlevel. FF EH ( ) A/ D C onv er si on Re su lt FFFH FF DH 03H 02H 01H 0. 5 LS B 0 12 3 409 3 4094 4095 409 6 A nal og In pu t Vo lt age 1. 5 LS B V DD 409 6 Ideal A/D Transfer Function A/D Programming Example ThefollowingtwoprogrammingexamplesillustratehowtosetandimplementanA/Dconversion. Inthefirstexample,themethodofpollingtheEOCBbitintheADCR0registerisusedtodetect whentheconversioncycleiscomplete,whereasinthesecondexample,theA/Dinterruptisusedto determinewhentheconversioniscomplete. |
Codice articolo simile - HT46R0042 |
|
Descrizione simile - HT46R0042 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEETIT.COM |
Lei ha avuto il aiuto da alldatasheet? [ DONATE ] |
Di alldatasheet | Richest di pubblicita | contatti | Privacy Policy | scambio Link | Ricerca produttore All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |