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IRCC Datasheet(PDF) 8 Page - SMSC Corporation |
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IRCC Datasheet(HTML) 8 Page - SMSC Corporation |
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8 / 79 page  8 OPERATION MODES RAW IR In Raw mode the state of the IR emitter and detector can be directly accessed through the host interface (Figure 3). The IR emitter tracks the Raw Tx Control bit. For example, depending on the state of the Tx Polarity control a logic '1' may turn the LED on and a logic '0' may turn the LED off. Care must be taken in software to ensure that the LED is not on continuously. The Raw Rx Control bit represents the state of the PIN diode. For example, depending on the state of the Rx Polarity control a logic '1' may mean no IR is detected, a logic '0' may mean IR is being detected. If an IR carrier is being received, the Raw Rx Control bit will oscillate at the carrier frequency. If enabled, a Raw Mode Interrupt will be generated when the Raw Rx Control bit transitions to the active state, depending on the state of the Rx Polarity control. RAW Tx Registers Transition Detect Enable Interrupt Encoder/Decoder RAW Rx FIGURE 3 - RAW IR BLOCK DIAGRAM |
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