Renesas H8S/2100 Series Hardware Manual page 469

6-bit single-chip microcomputer

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When a low-level period of 9 ms or more is detected after the reception of a command, the CIR

stops data reception. This is not defined in the NEC format.

A: Low-level period for a stop

C: High-level period for logic 0/1, low-level period for logic 0, and high-level period for a stop

D: Low-level period for logic 1

When a key of the remote controller remains pressed, the command is sent only once, followed by

a repeat signal. When a 9-ms high level and the following 2.25-ms low level are detected, they are

recognized as a repeat header.

A: High-level period for a repeat header

E: Low-level period for a repeat header

C: High-level period for a repeat

Figure 15.4 Stop

Repeat - Header

Figure 15.5 Repeat

Rev. 1.00 May 09, 2008 Page 443 of 954

Section 15 CIR Interface

REJ09B0462-0100