Serial Data Reception (Except In Block Transfer Mode) - Renesas RX100 Series User Manual

RX13T Group
23.6.7

Serial Data Reception (Except in Block Transfer Mode)

Serial data reception in smart card interface mode is similar to that in non-smart card interface mode. Figure 23.42
shows the data retransmit operation in receive mode.
Ds D0 D1 D2
RXI interrupt signal
SSR.PER flag
Figure 23.42 Data Retransmit Operation in SCI Receive Mode (Data Retransmit Operation during Reception)
(1) If a parity error is detected in receive data, the PER flag in the SSR register is set to 1. When the RIE bit in the SCR
register is 1 at this time, an ERI interrupt request is generated. Clear the PER flag to 0 before the next parity bit is
sampled.
(2) For a frame in which a parity error is detected, no RXI interrupt is generated.
(3) When no parity error is detected, the PER flag in the SSR register is not set to 1.
(4) In this case, data is determined to have been received successfully. When the RIE bit in the SCR register is 1, an
RXI interrupt request is generated.
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
nth transmitted frame
D3 D4 D5 D6 D7 Dp DE
(2)
(1)
23. Serial Communications Interface (SCIg, SCIh)
Retransmitted frame
Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp
(n + 1)-th
transmitted frame
Ds D0 D1 D2 D3 D4
(4)
(3)
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