Renesas H8S Series Hardware Manual page 542

Section 15 Serial Communication Interface (SCI, IrDA)
(2) Reception
During reception, IR frames are converted to UART frames using the IrDA interface before
inputting to SCI_1. Here, the input waveform can also be inverted using the IrRxINV bit in
SCICR.
Data of level 0 is output each time a high-level pulse is detected and data of level 1 is output when
no pulse is detected in a bit cycle. If a pulse has a high-level width of less than 1.41 µs, the
minimum width allowed, the pulse is recognized as level 0.
Rev. 3.00 Jul. 14, 2005 Page 494 of 986
REJ09B0098-0300