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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
When a parity error occurs
Ds
Legend
Ds
: Start bit
D0 to D7
: Data bits
Dp
: Parity bit
DE
: Error signal
Figure 17-3 Normal Smart Card Interface Data Format
D0
D1
D2
D3
Transmitting station output
D0
D1
D2
D3
Transmitting station output
D4
D5
D6
D7
D4
D5
D6
D7
Dp
Dp
DE
Receiving station
output
673
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