h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 545

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

[4] The receiving station carries out a parity check.
[5] If the transmitting station does not receive an error signal, it proceeds to transmit the next data
Block Transfer Mode: The operation sequence in block transfer mode is as follows.
[1] When the data line in not in use it is in the high-impedance state, and is fixed high with a pull-
[2] The transmitting station starts transfer of one frame of data. The data frame starts with a start
[3] With the Smart Card interface, the data line then returns to the high-impedance state. The data
[4] After reception, a parity error check is carried out, but an error signal is not output even if an
[5] The transmitting station proceeds to transmit the next data frame.
If there is no parity error and the data is received normally, the receiving station waits for
reception of the next data.
If a parity error occurs, however, the receiving station outputs an error signal (DE, low-level)
to request retransmission of the data. After outputting the error signal for the prescribed length
of time, the receiving station places the signal line in the high-impedance state again. The
signal line is pulled high again by a pull-up resistor.
frame.
If it does receive an error signal, however, it returns to step [2] and retransmits the erroneous
data.
up resistor.
bit (Ds, low-level), followed by 8 data bits (D0 to D7) and a parity bit (Dp).
line is pulled high with a pull-up resistor.
error has occurred. When an error occurs reception cannot be continued, so the error flag
should be cleared to 0 before the parity bit of the next frame is received.
Rev. 5.00 Sep 22, 2005 page 519 of 1136
Section 14 Smart Card Interface
REJ09B0257-0500