Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 1058 of 1823
Jul 31, 2019
RX23W Group 33. Serial Communications Interface (SCIg, SCIh)
33.6.7 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 33.43
shows the data retransmit operation in receive mode.
Figure 33.43 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.
(n + 1)-th
transmitted frame
Retransmitted framenth transmitted frame
Ds D0 D1 D2 D6 D7 DpD3 D4 D5 DE Ds D0 D1 D2 D6 D7 DpD3 D4 D5 Ds D0 D1 D2 D3 D4
(1)
(2)
(4)
(3)
RXI interrupt signal
SSR.PER flag

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English