Datasheet

Section 16 CIR Interface
Rev. 2.00 Sep. 28, 2009 Page 469 of 994
REJ09B0452-0200
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.