RX610 Group
20. Serial Communications Interface (SCI)
R01UH0032EJ0120 Rev.1.20
Page 661 of 1006
Feb 20, 2013
20.5.2
Data Format (Except in Block Transfer Mode)
Figure 20.21 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 one 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 re-transmitted after at least 2 etu.
Ds
D0
D1
D2
D3
D4
D5
D6
D7
Dp
In normal transmission/reception
Output from the transmitting station
Ds
D0
D1
D2
D3
D4
D5
D6
D7
Dp
When a parity error is generated
Output from the transmitting station
DE
Output from the
receiving station
[Legend]
Ds:
Start bit
D0 to D7: Data bits
Dp:
Parity bit
DE:
Error signal
Figure 20.21 Data Formats in Smart Card Interface Mode
Summary of Contents for RX600 Series
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