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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT69F360 датащи(PDF) 193 Page - Holtek Semiconductor Inc |
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HT69F360 датащи(HTML) 193 Page - Holtek Semiconductor Inc |
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193 / 235 page  Rev. 1.30 19� �ove��e� 1�� �01� Rev. 1.30 193 �ove��e� 1�� �01� HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM HT69F340/HT69F350/HT69F360 TinyPowerTM I/O Flash MCU with LCD & EEPROM LVDC Register Bit 7 6 5 4 3 2 1 0 �a�e — — LVDO LVDE� LVPU VLVD� VLVD1 VLVD0 R/W — — R R/W R/W R/W R/W R/W POR — — 0 0 0 0 0 0 Bit7~6 Unimplemented,readas"0" Bit5 LVDO:LVDOutputFlag 0:NoLowVoltageDetect 1:LowVoltageDetect Bit4 LVDEN:LowVoltageDetectorControl 0:Disable 1:Enable Bit3 LVPU:I/OportsPull-highresistorControl 0:Allpinpull-highresistoris60kΩ@5V(normalmode) 1:Allpinpull-highresistoris15kΩ@5V(lowvoltagemode) Bit2~0 VLVD2 ~ VLVD0:SelectLVDVoltage 000:1.8V 001:2.0V 010:2.4V 011:2.7V 100:3.0V 101:3.3V 110:3.6V 111:4.0V LVD Operation TheLowVoltageDetectorfunctionoperatesbycomparingthepowersupplyvoltage,VDD,witha pre-specifiedvoltagelevelstoredintheLVDCregister.Thishasarangeofbetween1.8Vand4.0V. Whenthepowersupplyvoltage,VDD,fallsbelowthispre-determinedvalue,theLVDObitwillbe sethighindicatingalowpowersupplyvoltagecondition.TheLowVoltageDetectorfunctionis suppliedbyareferencevoltagewhichwillbeautomaticallyenabled.WhenthedeviceisinSLEEP modethelowvoltagedetectorwillbeautomaticallydisabled.AfterenablingtheLowVoltage Detector,atimedelaytLVDSshouldbeallowedforthecircuitrytostabilisebeforereadingtheLVDO bit.NotealsothatastheVDDvoltagemayriseandfallratherslowly,atthevoltagenearsthatof VLVD,theremaybemultiplebitLVDOtransitions. VD D V LV D LV DE N LV DO t LV DS LVD Operation TheLowVoltageDetectoralsohasitsowninterruptwhichiscontainedwithinoneoftheMulti- functioninterrupts,providinganalternativemeansoflowvoltagedetection,inadditiontopolling theLVDObit.TheinterruptwillonlybegeneratedafteradelayoftLVDaftertheLVDObithasbeen sethighbyalowvoltagecondition.WhenthedeviceispowereddowntheLowVoltageDetector willremainactiveiftheLVDENbitishigh.Inthiscase,theLVFinterruptrequestflagwillbeset, causinganinterrupttobegeneratedifVDDfallsbelowthepresetLVDvoltage.Thiswillcausethe devicetowake-upfromtheSLEEPMode,howeveriftheLowVoltageDetectorwakeupfunctionis notrequiredthentheLVFflagshouldbefirstsethighbeforethedeviceenterstheSLEEPMode. |
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