CIRCC Datasheet, PDF (1/70 Pages) SMSC Corporation – Consumer Infrared Communications Controller

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.