RL78/D1A User's Manual: Hardware - Renesas

Under development
Preliminary document
Specifications in this document are tentative and subject to change.
RL78/D1A CHAPTER 13 ASYNCHRONOUS SERIAL INTERFACE LIN-UART (UARTF)
Figure 13-7. Format of LIN-UARTn Status Register (UFnSTR) (4/6)
UFnTSF Transmission status flag
0 A transmit operation is not performed.
When UFnCTL0.UFnTXE has been cleared to “0”
When there was no next transmit data in UFnTX, UFnWTX, UFnBUF0 to UFnBUF8
register upon transmission completion
When there was no next transmit data in UFnTX, UFnWTX, UFnBUF0 to UFnBUF8
bit after BF transmission has ended
When the transmission after data consistency error detection is completed
1 A transmit operation is performed.
Writes to UFnTX, UFnWTX register
When BF transmit trigger bit (UFnBTT) has been set Note
When the transmission request bit (UFnTRQ) is set
The UFnTSF bit is always “1” when successive transmission is performed.
To initialize the transmission unit, check that UFnTSF is “0” before performing initialization. If
initialization is performed while UFnTSF = 1, the transmission will be aborted midway.
If a BF is detected in BF reception enabled mode during communication and when transmitting
data, or if a BF/SF is detected in automatic baud rate mode and when transmitting data, the
UFnDCE flag will be set and the UFnTSF bit will be cleared when a status interrupt (INTLSn) is
issued.
Note Only during BF period
UFnRSF Reception status flag
0 A receive operation is not performed.
When UFnCTL0.UFnRXE has been cleared to “0”
When at sampling point of stop bit (first bit) during reception
When UFnBRT = 1 is set
When a BF is detected in BF reception enabled mode during communication
When a BF/SF is detected in automatic baud rate mode
1 A receive operation is performed.
When a start bit is detected (when it is detected that the data is 0 at the sampling point
of the bit after the LRxDn falling edge is detected)
To initialize the reception unit, check that UFnRSF is “0” before performing initialization. If
initialization is performed while UFnRSF = 1, the rception will be aborted midway.
R01UH0317EJ0004 Rev. 0.04 698
Feb. 22, 2013