Renesas H8S/2100 Series, Hardware Manual

Page: 495 / 1024

Section 16 CIR Interface
Rev. 1.00 Apr. 28, 2008 Page 469 of 994
REJ09B0452-0100
Section 16 CIR Interface
This LSI incorporates a custom infra-red interface (CIR). The CIR has various functions for
receiving the IR signal in NEC format.
16.1 Features
•
Supports reception of the IR signal in NEC format
•
Sampling clock selectable
Selectable from internal clocks
φ
,
φ
/2, and
φ
/4, and subclock (
φ
SUB
)
•
Noise canceling function
Input noise can be filtered out by using a maximum of four stages of filters.
•
Polarity inversion of the input signal supported
•
18-byte FIFO incorporated
•
Six interrupt sources: receive end, framing error, overrun error, repeat detection, abort
generation, and header detection
Interrupt sources can be specified by checking each flag.
Figure 16.1 is a block diagram of the CIR.