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CIRCC Datasheet(PDF) 1 Page - SMSC Corporation |
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CIRCC Datasheet(HTML) 1 Page - SMSC Corporation |
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1 / 70 page  CIrCC Consumer Infrared Communications Controller FEATURES • Multi-Protocol Serial Communications Controller • Full IrDA v1.0 Implementation: 2.4 kbps to 115.2 kbps • Consumer Infrared Remote Control Interface • SHARP Amplitude Shift Keyed Infrared (ASK IR) Interface • Direct Rx/Tx Infrared Diode Control (Raw) and General Purpose Data Pins • Programmable High-Speed Synchronous Communications Engine (SCE) with a 32- Byte FIFO and Programmable Threshold • Programmable DMA Refresh Counter • High-Speed NS16C550A-Compatible Universal Asynchronous Receiver/ Transmitter Interface (ACE UART) with 16- Byte Send and Receive FIFOs • ISA Single-Byte and Burst-Mode DMA and Interrupt-Driven Programmed I/O with Zero Wait State and String Move Timing • Automatic Transceiver Control • Transmit Pulse Width Limiter • SCE Transmit Delay Timer • IR Media Busy Indicator GENERAL DESCRIPTION This document describes the Consumer Infrared Communications Controller (CIrCC) function, which is common to a number of SMSC products. The CIrCC consists of two main architectural blocks: the ACE 16C550A UART and a Synchronous Communications Engine (SCE) (Figure 2). Each Block is supported by its own unique register set. The CIrCC UART-driven IrDA SIR and SHARP ASK modes are backward-compatible with early SMSC Super I/O and Ultra I/O infrared implementations. The CIrCC SCE supports IrDA version 1.0 and consumer IR modes. All of the SCE modes use DMA. The CIrCC offers flexible signal routing and programmable output control through the Raw mode interface, General Purpose Data pins and Output Multiplexer. Hardware decoding of the NEC PPM Consumer IR Remote Control format is implemented in the CIrCC. The CIrCC provides a PME output signal that is used to indicate the occurrence of a valid CIR Wake-up event. Chip-level address decoding is required to access the CIrCC register sets. |
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