Renesas RL78/G1P Hardware User Manual page 451

RL78/G1P
11.7 Operation of UART (UART0) Communication
This is a start-stop synchronization function using two lines: serial data transmission (T
(R D) lines. By using these two communication lines, each data frame, which consist of a start bit, data, parity bit, and
X
stop bit, is transferred asynchronously (using the internal baud rate) between the microcontroller and the other
communication party. Full-duplex asynchronous communication UART communication can be performed by using a
channel dedicated to transmission (even-numbered channel) and a channel dedicated to reception (odd-numbered
channel).
[Data transmission/reception]
 Data length of 7, 8, or 9 bits
 Select the MSB/LSB first
 Level setting of transmit/receive data (selecting whether to reverse the level)
 Parity bit appending and parity check functions
 Stop bit appending, stop bit check function
[Interrupt function]
 Transfer end interrupt/buffer empty interrupt
 Error interrupt in case of framing error, parity error, or overrun error
[Error detection flag]
 Framing error, parity error, or overrun error
In addition, UART0 reception supports the SNOOZE mode. When RxD0 pin input is detected while in the STOP mode,
the SNOOZE mode makes data reception that does not require the CPU possible.
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
CHAPTER 11 SERIAL ARRAY UNIT
D) and serial data reception
X
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