Renesas RL78 Series User Manual page 390

RL78/G1D
13.1.2 UART (UART0, UART1)
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 UART communication can be performed by using a channel dedicated to transmission
(even-numbered channel) and a channel dedicated to reception (odd-numbered channel).
For details about the settings, see 13.6 Operation of UART (UART0, UART1) Communication.
[Data transmission/reception]
● Data length of 7, 8, or 9 bits
● Select the MSB/LSB first
● Level setting of transmit/receive data and select of reverse
● Parity bit appending and parity check functions
● Stop bit appending
[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 RxD input is detected while in the STOP mode, the
SNOOZE mode makes data reception that does not require the CPU possible. The reception baud rate adjustment
function is supported.
Note Only UART0 can be specified for the 9-bit data length.
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
Note
CHAPTER 13 SERIAL ARRAY UNIT
D) and serial data reception
X
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