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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT45F3W датащи(PDF) 28 Page - Holtek Semiconductor Inc |
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HT45F3W датащи(HTML) 28 Page - Holtek Semiconductor Inc |
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28 / 167 page  Rev. 1.50 �8 De�e��e� 01� �01� Rev. 1.50 �9 De�e��e� 01� �01� HT45F3W R-Type Blood Pressure Meter Flash MCU HT45F3W R-Type Blood Pressure Meter Flash MCU FD3H Register Bit 7 6 5 4 3 2 1 0 Na�e D15 D14 D13 D1� D11 D10 D9 D8 R/W R/W R/W R/W R/W R/W R/W R/W R/W POR 0 0 0 0 0 0 0 0 Bit7~0 D15~D8:ThefourthflashROMdata[15:8] Set Flash Write enable (FWEN) InordertoallowusertochangeFlashROMdatathroughFlashcontrolregister,theusermustfirst enabletheFlashwriteoperationbythefollowingprocedure: • Write110totheFMOD2~FMOD0forsettingFWENmode. • SetFWPENbitto1.Thestep1andstep2cansetsimultaneously. • TheHardwarewillstarta300μscountertoallowtheuserwritingthecorrectpatterndatato FD1L/FD1H~FD3L/FD3H.(Theclockof300μscounterisfromLIRC.) • Once300μscounterisoverfloworthepatternisuncorrect.TheenableFlashwriteoperationis failandtheusermustrepeattheaboveprocedureonemore. • Nomatter,theoperationissuccessorfail.ThehardwarewillclearFWPENbitautomatically. • Thepatterndatais(00H04H0DH09HC3H40H)toFD1L/FD1H~FD3L/FD3H. • OncetheFlashwriteoperationisenable,theusercanchangetheFlashROMdatathroughthe Flashcontrolregister. • FordisabletheFlashwriteoperation,theuseronlyclearCFWEN,itisnoneedtowritetheabove procedure. Set Flash W�ite ena�le Set FMOD[�:0]=110 (FWEN �ode) Set FWPEN=1� Ha�dwa�e set a �ounte� W�tie the following patte�n to Flash Data �egiste� FD1L= 00h � FD1H = 04h FD�L=0Dh � FD�H = 09h FD3L=C3h � FD3H = 40h Is patte�n is �o��e�t ? Is �ounte� ove�flow ? FWPEN=0 ? yes no Set FWEN �ode fail FWPEN=0 no yes Set FWEN �ode su��ess. yes no END Set Flash Write Enable Procedure |
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