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PIC18LF4331 Datasheet(PDF) 227 Page - Microchip Technology |
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PIC18LF4331 Datasheet(HTML) 227 Page - Microchip Technology |
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227 / 392 page  2010 Microchip Technology Inc. DS39616D-page 227 PIC18F2331/2431/4331/4431 FIGURE 20-2: EUSART TRANSMIT BLOCK DIAGRAM FIGURE 20-3: ASYNCHRONOUS TRANSMISSION FIGURE 20-4: ASYNCHRONOUS TRANSMISSION (BACK TO BACK) TXIF TXIE Interrupt TXEN Baud Rate CLK SPBRG Baud Rate Generator TX9D MSb LSb Data Bus TXREG Register TSR Register (8) 0 TX9 TRMT SPEN RC6/TX/CK/SS Pin Pin Buffer and Control 8 SPBRGH BRG16 Word 1 Word 1 Transmit Shift Reg Start bit bit 0 bit 1 bit 7/8 Write to TXREG BRG Output (Shift Clock) RC6/TX/CK/SS TXIF bit (Interrupt Reg. Flag) TRMT bit (Transmit Shift Reg. Empty Flag) 1 TCY (pin) Word 1 Stop bit Transmit Shift Reg. Write to TXREG BRG Output (Shift Clock) RC6/TX/CK/SS TXIF bit (Interrupt Reg. Flag) TRMT bit (Transmit Shift Reg. Empty Flag) Word 1 Word 2 Word 1 Word 2 Stop bit Start bit Transmit Shift Reg. Word 1 Word 2 bit 0 bit 1 bit 7/8 bit 0 Note: This timing diagram shows two consecutive transmissions. 1 TCY 1 TCY (pin) Start bit |
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