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PIC18F23K20-E/ML bảng dữ liệu(PDF) 238 Page - Microchip Technology |
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PIC18F23K20-E/ML bảng dữ liệu(HTML) 238 Page - Microchip Technology |
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238 / 456 page ![]() PIC18F2XK20/4XK20 DS41303G-page 238 2010 Microchip Technology Inc. FIGURE 18-2: EUSART RECEIVE BLOCK DIAGRAM The operation of the EUSART module is controlled through three registers: • Transmit Status and Control (TXSTA) • Receive Status and Control (RCSTA) • Baud Rate Control (BAUDCON) These registers are detailed in Register 18-1, Register 18-2 and Register 18-3, respectively. For all modes of EUSART operation, the TRIS control bits corresponding to the RX/DT and TX/CK pins should be set to ‘1’. The EUSART control will automatically reconfigure the pin from input to output, as needed. When the receiver or transmitter section is not enabled then the corresponding RX or TX pin may be used for general purpose input and output. RX/DT pin Pin Buffer and Control Data Recovery CREN OERR FERR RSR Register MSb LSb RX9D RCREG Register FIFO Interrupt RCIF RCIE Data Bus 8 Stop START (8) 7 1 0 RX9 • • • SPBRG SPBRGH BRG16 RCIDL FOSC ÷ n n + 1 Multiplier x4 x16 x64 SYNC 1X00 0 BRGH X110 0 BRG16 X101 0 Baud Rate Generator |
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