r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 924

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 15 Serial Communication Interface (SCI, IrDA)
15.7.2
Figure 15.22 shows the transfer data format in Smart Card interface mode.
• One frame consists of 8-bit data plus a parity bit in asynchronous mode.
• In transmission, a guard time of at least 2 etu (Elementary Time Unit: time for transfer of 1 bit)
• If a parity error is detected during reception, a low error signal level is output for one etu
• If an error signal is sampled during transmission, the same data is retransmitted automatically
Data transfer with the types of IC cards (direct convention and inverse convention) are performed
as described in the following.
Rev. 1.00 Sep. 19, 2008 Page 896 of 1270
REJ09B0466-0100
is left between the end of the parity bit and the start of the next frame.
period, 10.5 etu after the start bit.
after the elapse of 2 etu or longer.
When there is no parity error
When a parity error occurs
Legend:
Ds
D0 to D7
Dp
DE
Data Format (Except for Block Transfer Mode)
(Z)
Figure 15.23 Direct Convention (SDIR = SINV = O/E = 0)
: Start bit
: Data bits
: Parity bit
: Error signal
Ds
Ds
Figure 15.22 Normal Smart Card Interface Data Format
Ds
A
D0
D0
D0 D1 D2 D3 D4 D5 D6 D7 Dp
Z
D1
D1
Z
Transmitting station output
Transmitting station output
D2
D2
A
D3
D3
Z
Z
D4
D4
Z
D5
D5
A
D6
D6
A
Z
D7
D7
Dp
Dp
(Z) State
Receiving station
output
DE