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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F4M датащи(PDF) 89 Page - Holtek Semiconductor Inc |
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HT45F4M датащи(HTML) 89 Page - Holtek Semiconductor Inc |
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89 / 138 page  Rev. 1.10 88 �an�a�� 1�� �01� Rev. 1.10 89 �an�a�� 1�� �01� HT45F4M Lithium Battery Backup Power ASSP MCU HT45F4M Lithium Battery Backup Power ASSP MCU ADCR1 Register Bit 7 6 5 4 3 2 1 0 Name ACS4 VBGEN — 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 ACS4:SelecteInternal1.25VasADCinputControl 0:disable 1:enable Thisbitenables1.25VtobeconnectedtotheA/Dconverter.TheVBGENbitmust firsthavebeensettoenablethebandgapcircuit1.25VvoltagetobeusedbytheA/D converter.WhentheACS4bitissethigh,thebandgap1.25Vvoltagewillberoutedto theA/DconverterandtheotherA/Dinputchannelsdisconnected. Bit6 VBGEN :Internal1.25VControl 0:disable 1:enable ThisbitcontrolstheinternalBandgapcircuiton/offfunctiontotheA/Dconverter. Whenthebitissethighthebandgap1.25VvoltagecanbeusedbytheA/Dconverter. If1.25VisnotusedbytheA/DconverterandtheLVR/LVDfunctionisdisabledthen thebandgapreferencecircuitwillbeautomaticallyswitchedofftoconservepower. When1.25VisswitchedonforusebytheA/Dconverter,atimetBGshouldbeallowed forthebandgapcircuittostabilisebeforeimplementinganA/Dconversion. Bit5 Unimplemented,readas"0" Bit4 VREFS:SelecteADCreferencevoltage 0:InternalADCpower 1:VREFpin ThisbitisusedtoselectthereferencevoltagefortheA/Dconverter.Ifthebitishigh thentheA/DconverterreferencevoltageissuppliedontheexternalVREFpin.Ifthe pinislowthentheinternalreferenceisusedwhichistakenfromthepowersupplypin VDD. Bit3 Unimplemented,readas"0" Bit2~0 ADCK2 ~ ADCK0:SelectADCclocksource 000:fSYS 001:fSYS/2 010:fSYS/4 011:fSYS/8 100:fSYS/16 101:fSYS/32 110:fSYS/64 111:Undefined ThesethreebitsareusedtoselecttheclocksourcefortheA/Dconverter. |
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