HD6432633 Datasheet, PDF (835/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

17.3.3 Data Format
(1) Normal Transfer Mode
Figure 17-3 shows the normal Smart Card interface data format. In reception in this mode, a parity
check is carried out on each frame, and if an error is detected an error signal is sent back to the
transmitting end, and retransmission of the data is requested. If an error signal is sampled during
transmission, the same data is retransmitted.
When there is no parity error
Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp
Transmitting station output
When a parity error occurs
Ds D0 D1 D2 D3 D4 D5 D6 D7 Dp
DE
Legend
Ds
: Start bit
D0 to D7 : Data bits
Dp
: Parity bit
DE
: Error signal
Transmitting station output
Receiving station
output
Figure 17-3 Normal Smart Card Interface Data Format
781