Data Format - Renesas H8S/2633 Series Hardware Manual

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
When a parity error occurs
Ds D0
Legend
Ds
: Start bit
D0 to D7
: Data bits
Dp : Parity bit
DE : Error signal
Figure 17-3 Normal Smart Card Interface Data Format
D1 D2 D3 D4
Transmitting station output
D1 D2 D3 D4
Transmitting station output
D5 D6 D7 Dp
D5 D6 D7 Dp DE
Receiving station
output
781