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HT66F20 Datasheet(PDF) 244 Page - Holtek Semiconductor Inc |
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HT66F20 Datasheet(HTML) 244 Page - Holtek Semiconductor Inc |
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244 / 298 page  Rev. 1.90 �44 �e���a�� 18� �01� Rev. 1.90 �45 �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 UART Data T�ansfe� Scheme MSB LSB ………………………… T�ansmitte� Shift Registe� (TSR) MSB LSB ………………………… Receive� Shift Registe� (RSR) TX Pin RX Pin Ba�d Rate Gene�ato� TX Registe� (TXR) RX Registe� (RXR) B�ffe� 1 B�ffe� � B�ffe� � Data to �e t�ansmitted Data �eceived UART Data Transfer Scheme UART Commands TherearebothreadandwritecommandsfortheUARTModule.Forreadingandwritingtoregisters bothcommandandaddressinformationiscontainedwithinasinglebyte.Theformatforreadingand writingisshowninthefollowingtable. Command Type Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Read �I�O 0 0 0 0 0 × × × Read Registe� 0 0 0 1 0 A� A1 A0 W�ite �I�O 0 0 0 0 1 × × × W�ite Registe� 0 0 0 1 1 A� A1 A0 Note: "×" he�e stands fo� don't ca�e UART Status and Control Registers TherearesixregistersassociatedwiththeUARTfunction.TheUSR,UCR1,UCR2andUCR3 registerscontroltheoverallfunctionoftheUARTmodule,whiletheBRGregistercontrolstheBaud rate.Theactualdatatobetransmittedandreceivedontheserialinterfaceismanagedthroughthe TXR/RXRdataregister. A[2:0] Name Reset Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 00H USR 0000 1011 PERR N� �ERR OERR RIDLE RXI� TIDLE TXI� 01H UCR1 0000 0×00 UARTEN BNO PREN PRT STOPS TXBRK RX8 TX8 0�H UCR� 0000 0000 TXEN RXEN BRGH ADDEN WAKE RIE TIIE TEIE 0�H BRG ×××× ×××× BRG7 BRG6 BRG5 BRG4 BRG� BRG� BRG1 BRG0 04H UCR� 0--- ---- URST — — — — — — — 05H~07H Un�sed ---- ---- Rese�ved UART Register Summary |
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