RL78/G10 CHAPTER 12 SERIAL ARRAY UNIT
R01UH0384EJ0311 Rev. 3.11 366
Dec 22, 2016
12.6.1 UART transmission
UART transmission is an operation to transmit data from the RL78/G10 to another device asynchronously (start-stop
synchronization).
Of the two channels used for UART, the even-numbered channel is used for UART transmission.
UART UART0
Target channel Channel 0 of SAU0
Pins used TxD0
Interrupt INTST0
Transfer end interrupt (in single-transfer mode) or buffer empty interrupt (in continuous transfer
mode) can be selected.
Error detection flag None
Transfer data length 7 or 8 bits (UART0 only)
Transfer rate
Note
Max. fMCK/6 [bps] (SDR0nH[7:1] = 2 or greater, Min. fCLK/(2 × 2
15
× 128) [bps]
Data phase
Non-inverted output (default: high level)
Inverted output (default: low level)
Parity bit
The following selectable
• No parity bit
• Appending 0 parity
• Appending even parity
• Appending odd parity
Stop bit
The following selectable
• Appending 1 bit
• Appending 2 bits
Data direction MSB or LSB first
Note Use this operation within a range that satisfies the conditions above and the peripheral function characteristics
in the electrical specifications (see CHAPTER 24 ELECTRICAL SPECIFICATIONS).
Remarks 1. f
MCK: Operation clock frequency of target channel
f
CLK: System clock frequency
2. n: Channel number (n = 0)
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