HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 524

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 13 Smart Card Interface
13.3
13.3.1
The main functions of the Smart Card interface are as follows.
Rev.3.00 Mar. 26, 2007 Page 482 of 772
REJ09B0355-0300
One frame consists of 8-bit data plus a parity bit.
In transmission, a guard time of at least 2 etu (Elementary Time Unit: the time for transfer of
one bit) is left between the end of the parity bit and the start of the next frame.
If a parity error is detected during reception, a low error signal level is output for one etu
period, 10.5 etu after the start bit.
If the error signal is sampled during transmission, the same data is transmitted automatically
after the elapse of 2 etu or longer.
Only asynchronous communication is supported; there is no clocked synchronous
communication function.
Operation
Overview