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PIC18F242 Datasheet(PDF) 167 Page - Microchip Technology |
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PIC18F242 Datasheet(HTML) 167 Page - Microchip Technology |
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167 / 332 page  © 2006 Microchip Technology Inc. DS39564C-page 165 PIC18FXX2 16.0 ADDRESSABLE UNIVERSAL SYNCHRONOUS ASYNCHRONOUS RECEIVER TRANSMITTER (USART) The Universal Synchronous Asynchronous Receiver Transmitter (USART) module is one of the two serial I/O modules. (USART is also known as a Serial Com- munications Interface or SCI.) The USART can be con- figured as a full duplex asynchronous system that can communicate with peripheral devices, such as CRT ter- minals and personal computers, or it can be configured as a half-duplex synchronous system that can commu- nicate with peripheral devices, such as A/D or D/A integrated circuits, serial EEPROMs, etc. The USART can be configured in the following modes: • Asynchronous (full-duplex) • Synchronous - Master (half-duplex) • Synchronous - Slave (half-duplex) In order to configure pins RC6/TX/CK and RC7/RX/DT as the Universal Synchronous Asynchronous Receiver Transmitter: • bit SPEN (RCSTA<7>) must be set (= 1), • bit TRISC<6> must be cleared (= 0), and • bit TRISC<7> must be set (=1). Register 16-1 shows the Transmit Status and Control Register (TXSTA) and Register 16-2 shows the Receive Status and Control Register (RCSTA). |
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