Uart To Uart Connection With Full Handshaking; Uart Frame Data Format - Texas Instruments TMS320C6A816 Series Technical Reference Manual

www.ti.com
19.2.3 UART Mode
This section describes how the UART functions in UART wired mode.
connect the UART operating in UART mode to another UART on an external device.
Figure 19-1. UART to UART Connection With Full Handshaking
UART/IrDA/CIR
The UART uses a wired interface for serial communication with a remote device. It can use hardware or
software flow control to manage transmission/reception. Hardware flow control significantly reduces
software overhead and increases system efficiency by automatically controlling serial data flow using
the RTS output and CTS input signals. Software flow control automatically controls data flow by using
programmable XON/XOFF characters.
The UART modem module is enhanced with an autobauding functionality, which in control mode allows
to automatically set the speed, the number of bit per character, and the parity selected.
shows the UART frame data format. Each frame consists of a start bit, 5 to 8 data bits (user
configurable), an optional parity bit (user configurable), and 1 or 2 stop bits (user configurable).
Start-bit
SPRUGX9 – 15 April 2011
Submit Documentation Feedback
Preliminary
Controller
UART_TXD
UART_RXD
UART_RTS
UART_CTS
UART_DTR
UART_DSR
UART_DCD
UART_RIN
Figure 19-2. UART Frame Data Format
5, 6, 7, or 8 bits of data according to LCR register
© 2011, Texas Instruments Incorporated
Figure 19-1 shows how to
UART
TX
RX
RTS
CTS
DTR
DSR
DCD
RIN
Figure 19-2
Parity bit 1 or 2
(see LCR stop-bits
register) according
to LCR
register
UART/IrDA/CIR Module
Architecture
uart-005
1683