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HT45R4U датащи(PDF) 50 Page - Holtek Semiconductor Inc |
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HT45R4U датащи(HTML) 50 Page - Holtek Semiconductor Inc |
50 / 105 page Rev. 1.10 �0 �a��� 1�� �01� Rev. 1.10 �1 �a��� 1�� �01� HT45R4U TinyPowerTM A/D Type e-Banking ASSP OTP MCU with LCD Bit4 ACS4:SelectInternal1.25VasADCinputControl 0:disable 1:enable Thisbitenables1.25VtobeconnectedtotheA/Dconverter.TheV125ENbitmust firsthavebeensettoenablethebandgapcircuit1.25VvoltagetobeusedbytheA/D converter.WhentheACS4bitissethigh,thebandgap1.25Vvoltagewillberoutedto theA/DconverterandtheotherA/Dinputchannelsdisconnected. Bit3 unimplemented,readas"0" Bit2~0 ACS2,ACS1,ACS0:SelectA/Dchannel(whenACS4is"0") 000:AN0 001:AN1 010:AN2 011:AN3 100:AN4 101:AN5 110:AN6 111:AN7 ThesearetheA/Dchannelselectcontrolbits.Asthereisonlyoneinternalhardware A/DconvertereachoftheeightA/Dinputsmustberoutedtotheinternalconverter usingthesebits.IfbitACS4intheADCR1registerissethighthentheinternal1.25V willberoutedtotheA/DConverter. ADCR1 Register Bit 7 6 5 4 3 2 1 0 Name — VBGEN ADRFS VREFS — ADCK� ADCK1 ADCK0 R/W — R/W R/W R/W — R/W R/W R/W POR — 0 0 0 — 0 0 0 Bit7 unimplemented,readas"0" Bit6 VBGEN:Internal1.25VControl 0:disable 1:enable ThisbitcontrolstheinternalBandgapcircuiton/offfunctiontotheA/Dconverter. Whenthebitissethighthebandgapvoltage1.25VcanbeusedbytheA/Dconverter. If1.25VisnotusedbytheA/DconverterandtheLVR/LVDfunctionisdiabledthen thebandgapreferencecircuitwillbeautomaticallyswitchedofftoconservepower. When1.25VisswitchedonforusebytheA/Dconverter,atimetBGshouldbeallowed forthebandgapcircuittostabilisebeforeimplementinganA/Dconversion. Bit5 ADRFS:ADCDataFormatControl 0:ADCDataMSBisADRHbit7,LSBisADRLbit4 1:ADCDataMSBisADRHbit3,LSBisADRLbit0 Thisbitcontrolstheformatofthe12-bitconvertedA/DvalueinthetwoA/Ddata registers.DetailsareprovidedintheA/Ddataregisterssection. Bit4 VREFS:SelecteADCreferencevoltage 0:InternalADCpower 1:VREFpin ThisbitisusedtoselectthereferencevoltagefortheA/Dconverter.Ifthebitishigh, thentheA/DconverterreferencevoltageissuppliedontheexternalVREFpin.Ifthepin islow,thentheinternalreferenceisusedwhichistakenfromthepowersupplypinVDD. Bit3 Unimplemented,readas"0" |
Аналогичный номер детали - HT45R4U |
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Аналогичное описание - HT45R4U |
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