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PIC18FXX39 Datasheet, PDF (165/322 Pages) Microchip Technology – Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel | |||
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17.0 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 17-1 shows the Transmit Status and Control
Register (TXSTA) and Register 17-2 shows the
Receive Status and Control Register (RCSTA).
PIC18FXX39
ï£ 2002-2013 Microchip Technology Inc.
Preliminary
DS30485B-page 165
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