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

RX13T Group
23.6.2

Data Format (Except in Block Transfer Mode)

Figure 23.33 shows the data transfer formats in smart card interface mode.
 One frame consists of 8-bit data and a parity bit in asynchronous mode.
 During transmission, at least 2 etu (elementary time unit: time required for transferring 1 bit) is secured as a guard
time from the end of the parity bit until the start of the next frame.
 If a parity error is detected during reception, a low-level error signal is output for 1 etu after 10.5 etu has passed
from the start bit.
 If an error signal is sampled during transmission, the same data is automatically retransmitted after at least 2 etu.
In normal transmission/reception
Ds
When a parity error occurs
Ds
Ds: Start bit
D0 to D7: Data bits
Dp: Parity bit
DE: Error signal
Figure 23.33 Data Formats in Smart Card Interface Mode
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
D0 D1 D2 D3
Output from the transmitting station
D0 D1 D2 D3
Output from the transmitting station
23. Serial Communications Interface (SCIg, SCIh)
D4 D5 D6 D7
D4 D5 D6 D7
Dp
Dp DE
Output from the
receiving station
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