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HT66F20 Datasheet(PDF) 261 Page - Holtek Semiconductor Inc |
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HT66F20 Datasheet(HTML) 261 Page - Holtek Semiconductor Inc |
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261 / 298 page  Rev. 1.90 �60 �e���a�� 18� �01� Rev. 1.90 �61 �e���a�� 18� �01� HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM HT66F20/HT66F30/HT66F40/HT66F50/HT66F60 HT66FU30/HT66FU40/HT66FU50/HT66FU60 Enhanced A/D Flash Type 8-Bit MCU with EEPROM • ThePCKcontrolbitissetto1toenablethePCKoutputastheclocksourcefortheUARTbaud rategeneratorwithvariousPCKoutputfrequenciesdeterminedbythePCKP1andPCKP0bitsin theSIMC0Register. ♦ PCKoutputfrequencyselectionbitsPCKP1~PCKP0intheSIMC0Register Bit 3 2 Name PCKP1 PCKP0 val�e 11�10�01�00 00:PCKoutputfrequencyisfSYS 01:PCKoutputfrequencyisfSYS/4 10:PCKoutputfrequencyisfSYS/8 11:PCKoutputfrequencyisTM0CCRPmatchfrequency/2 ♦ PCKoutputenablecontrolbitPCKENintheSIMC0Register Bit 4 Name PCKEN val�e 1 0:DisablePCKoutput 1:EnablePCKoutput Aftertheabovesetupconditionshavebeenimplemented,theMCUcanenabletheSIMinterface bysettingtheSIMENbithigh.TheMCUcanthenbegincommunicationwithexternalUART connecteddevicesusingitsSPIinterface.ThedetailedMCUMasterSPIfunctionaldescriptionis providedwithintheSerialInterfaceModulesectionoftheMCUdatasheet. Application Circuit with UART Module OS C1 OS C2 OS C Ci rc ui t S ee O sci lla to r S ect io n AN x I/O P or ts XT 1 XT 2 OS C Ci rc ui t S ee O sci lla to r S ect io n RE S VD D VS S 0. 1 m F V DD R eset Ci rc ui t 0. 1~ 1 m F 10k W ~ 100k W 300 W * 0. 01 m F* * 1N 4148 * TX RX TI N RO UT RS 23 2 Tr an sce iv er To / F ro m RS 2 32 Bu s Note:*ItisrecommendedthatthiscomponentisaddedforaddedESDprotection. **Itisrecommendedthatthiscomponentisaddedinenvironmentswherepowerlinenoiseissignificant. |
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