Recovery From Bus Hang-Up - Renesas RX100 Series User Manual

RX13T Group
23.7.7

Recovery from Bus Hang-up

If the bus is stuck by an abnormal state in SCI because of the communication error, reset the SCI according to the
following steps and release the bus.
(1) Set the SCR.TE and RE bit to 0 at the same time to reset SCI.
(2) Set the SIMR3 register to F0h to release the bus.
(3) If the SSR.RDRF flag is 1, dummy-read the RDR register to clear the flag.
(4) Set the SCR.TE and RE bit to 1 at the same time.
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
23. Serial Communications Interface (SCIg, SCIh)
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