Data Format - Hitachi H8/3022 Hardware Manual

12.3.3

Data Format

Figure 12-3 shows the 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
When a parity error occurs
Ds
Legend
Ds : Start bit
D0 to D7 : Data bits
Dp : Parity bit
DE : Error signal
392
D0 D1 D2 D3
Transmitting station output
D0 D1 D2 D3
Transmitting station output
Figure 12-3 Smart Card Interface Data Format
D4 D5 D6 D7
D4 D5 D6 D7
Dp
Dp DE
Receiving station
output