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)
The following table shows examples of processing corresponding to statuses when performing LIN communication.
Table 13-4. Examples of Processing Corresponding to Statuses During LIN Communication (When in BF
Reception Enable Mode During Communication (UFnMD1, UFnMD0 = 10B) and When UFnDCS = 1)
UFnBSF UFnDCE UFnFE UFnOVE Status Processing Example
1 1 A mismatch is detected between transmit
and receive data during BF transmission in
master operation. Successive low levels of
at least 11 bits are received. The
transmission is not performed even if the
next data transmission has been prepared.
1 0
0 1
BF transmission and BF reception are
performed successfully in master operation.
BF reception is performed successfully in
slave operation.
BF transmission or data (including an SF or
a PID) transmission has failed in master
operation.
Even if transmission of the next data or BF
has been prepared, the transmission will
not be performed.
Data transmission has failed in slave
operation.
Even if transmission of the next data has
been prepared, the transmission will not be
performed.
0 0 1 A framing error has been detected during
data reception.
0 0 1 An overrun error has been detected during
data reception.
The single data that was received
immediately before has been discarded.
The next data (Sync field) transmission is
not performed and waiting for the next
time schedule is performed, because the
other party of communication may not
have been able to recognize the BF.
The other party of communication may
not have been able to recognize the BF,
but all status flags are cleared and the
next data is written to transmit the next
data (Sync field).
Processing to transmit the next data (Sync
field) is performed.
Processing to receive the next data (Sync
field) is performed.
Subsequent transmit and receive data is
discarded, all status registers are cleared,
and the system waits for the next time
schedule.
Subsequent transmit and receive data is
discarded, all status registers are cleared,
and the system waits for the next time
schedule.
Processing when a framing error has been
detected is performed.
Processing when an overrun error has
been detected is performed.
Cautions 1. Clear all status flags that have been set for any processing.
2. When an error is detected in LIN communication (including when BF reception has been
performed successfully when BF reception enable mode during communication (UFnMD1,
UFnMD0 = 10B) has been set), a status interrupt request signal (INTLSn) is generated instead of a
reception complete interrupt request signal (INTLRn) and a status flag is set according to the
communication status.
Remarks 1. : don’t care
2. n = 0, 1
R01UH0317EJ0004 Rev. 0.04 747
Feb. 22, 2013