IRCC SMSC Corporation, IRCC Datasheet
IRCC
Related parts for IRCC
IRCC Summary of contents
Page 1
... Consumer IR modes. All of the SCE modes use Synchronous DMA. The IrCC offers flexible signal routing and programmable output control through the Raw mode interface, General Purpose Data pins and Output Multiplexer. Chip-level address decoding is required to access the IrCC register sets. I/O and Ultra I/O infrared 1 ...
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... REGISTER BLOCK FOUR ............................................................................................................ 38 ACE UART............................................................................................................................................ 40 REGISTER DESCRIPTION........................................................................................................... 40 SCE ...................................................................................................................................................... 55 DESCRIPTION .............................................................................................................................. 55 FRAMING ...................................................................................................................................... 55 ACTIVE FRAME INDICATOR ....................................................................................................... 55 IrDA ENCODER............................................................................................................................. 56 CONSUMER IR ENCODER .......................................................................................................... 61 LOOPBACK MODE ....................................................................................................................... 63 BUS INTERFACE I/O ........................................................................................................................... 65 FIFO MULTIPLEXER..................................................................................................................... 65 128-BYTE SCE FIFO..................................................................................................................... 65 DMA............................................................................................................................................... 67 PROGRAMMED I/O ...................................................................................................................... 71 IOCHRDY TIME-OUT.................................................................................................................... 73 ZERO WAIT STATE SUPPORT.................................................................................................... 75 OUTPUT MULTIPLEXER ..................................................................................................................... 76 CHIP-LEVEL IrCC ADDRESSING SUPPORT...................................................................................... 77 AC TIMING ........................................................................................................................................... 78 2 ...
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... Clock Generator I Infrared Communications Controller System FIGURE 1 - SMSC IrCC FUNCTIONAL COMPONENTS nACE Bus Interface ISA Controls Databus Data (0-7) MUX Address (0-2) FIFO, DMA, I/O, Interrupts nSCE FIGURE 2 - IrCC ARCHITECTURAL BLOCK DIAGRAM Encoders Raw IR IR Transducer Consumer M odule IR Output M ux ASK IR COM IrDA IR ...
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... The Interface Description lists the signals that are required to place the IrCC in a larger chip- level context. There are four groups of signals in this section: PORT signals, HOST BUS controls, SYSTEM controls, and CHIP-LEVEL CONFIGURATION controls. NAME SIZE (BITS) IRRx IRTx NAME ...
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... SIZE (BITS) Fast GP Data Fast The Fast pin always reflects the state of Fast, bit 6 of SCE Line Control Register A. The state of Fast is independent of the IrCC Block Controls or the Output Multiplexer. The Fast pin can be used at the chip level for IR Transceiver configuration. NAME ...
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... IrCC DRQ output when the DMA Enable bit is inactive. The DMA Enable bit is located in SCE Configuration Register B, bit 0. IRQEN IRQEN is used by the chip-level interface to tristate the IrCC IRQ output when the OUT2 bit is inactive. The OUT2 bit is located in 16550A MODEM Control Register. Power Down The Power Down pin is used by the chip-level interface to put the SCE into low power mode ...
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... IR Mode Register Bits Input IR Option Register Location Bits IR Mode Typically part of a 16550A Serial Port Option Register. These values are also part of the IrCC Block Control bits 3-5, Register Block One, Address Zero. IR Location Typically part of a 16550A Serial Port IR Option Register. These values are the IrCC Output Mux bits, Register Block One, Address One ...
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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 ...
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... NRZ data stream. The components of this block can also modulate and SCE Rx Enable FIGURE 4 - IRCC CONSUMER IR (TV REMOTE) BLOCK demodulate serial data at programmable bit rates and carrier frequencies. Variable length encoding and all packet framing is handled by system software. Consequently, ...
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Carrier Frequency Divider The Carrier Frequency Divider register is used to program the ASK carrier frequency for the transmit modulator and receive detector (Figure 5). The divider is eight bits wide. The input clock to the Carrier Frequency Divider is ...
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... The Transmit and Receive Bit Rate Divider register is used to extract a serial NRZ data stream for the IrCC SCE. The divider is eight bits wide. The input clock to the Bit Rate Divider is 100KHz (Carrier Frequency Divider input clock ÷ 16). The relationship between the ...
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The Programmable Receive Carrier Sense register is used to program the Consumer IR decoder to detect the presence of IR energy in a wide-to-narrow range of carrier frequencies. The register is two bits wide. Table 11 - Receive Carrier Sense ...
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... For continuous periods of high or low data without transitions, the IrCC samples the signal level in the center of each incoming bit period. Using the Receiver Bit Cell Synchronization mechanism, any transition resets the timer that is ...
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... Two implementations have been provided in this block of the IrCC, IrDA SIR and Sharp ASK IR. IrDA SIR allows serial communication at baud rates up to 115K Baud. Each word is sent serially beginning with a zero value start bit. A zero is signaled by sending a single infrared pulse at the beginning of the serial bit time ...
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DATA IRRX nIRRX FIGURE 7 - IrDA RECEIVE TIMING PARAMETER t1 Pulse Width at 115kbaud t1 Pulse Width at 57.6kbaud t1 Pulse Width at 38.4kbaud t1 Pulse Width at 19.2kbaud t1 Pulse Width at 9.6kbaud ...
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DATA IRTX nIRTX FIGURE 8 - IrDA TRANSMIT TIMING PARAMETER t1 Pulse Width at 115kbaud t1 Pulse Width at 57.6kbaud t1 Pulse Width at 38.4kbaud t1 Pulse Width at 19.2kbaud t1 Pulse Width ...
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DATA IRTX nIRTX t3 t4 MIRTX t5 t6 nMIRTX FIGURE 9 - AMPLITUDE SHIFT KEYED IR TRANSMIT TIMING PARAMETER t1 Modulated Output Bit Time t2 Off Bit Time t3 Modulated Output “On” t4 Modulated Output ...
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DATA IRTX nIRTX t3 t4 MIRTX t5 t6 nMIRTX FIGURE 10 - AMPLITUDE SHIFT KEYED IR RECEIVE TIMING PARAMETER t1 Modulated Output Bit Time t2 Off Bit Time t3 Modulated Output “On” t4 Modulated Output ...
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... SIR-Physical Layer Specification, Version 1.1, October 17, 1995, the SIR-Link Access Protocol (IrLAP), Version 1.0, UART SCE FIGURE 11 - IRCC IRDA BLOCK DIAGRAM SIR Interaction Pulse The SIR Interaction Pulse (SIP) is intended to guarantee non-disruptive coexistence with SIR- only systems which might otherwise interfere with Fast IR links ...
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... FIGURE 12 - SIR INTERACTION PULSE The SIR Interaction Pulse is controlled by the IrCC configuration register SIP ENABLE bit and a timer. The IrCC transmits an SIR Interaction Pulse every 500ms when the SIP enable is active, an IrDA FIR mode has been selected, and the transmitter or receiver is not otherwise engaged ...
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... The IrCC can account for system-dependent limitations such as long interrupt latencies and transceiver stabilization times by increasing the number of STA flags at the beginning of every HDLC frame (Figure 14). BOF COUNT register Appends 0 - 4095 Flags to Beginning of Frame STA STA '01111110' '01111110' binary binary FIGURE 14 - EXTENDED BEGINNING-OF-FRAME ...
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... CRC binary binary FIGURE 15 - BRICK WALLED HDLC FRAMES 4PPM BOF Counting The IrCC can account for system-dependent limitations such as long interrupt latencies and transceiver stabilization times by increasing the number of PA flags at the beginning of every 4PPM frame (Figure 16). The BOF COUNT register contains the number ...
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Back-to-back, or brick walled frames are allowed with 32 or more PA flag bytes between the STO field of the first frame and the STA field of the second frame. BW COUNT register Inserts 0 - 4095 PA Bytes between ...
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... The IrCC is partially enabled through binary controls found in two 8-byte register banks. The banks, the ACE550 UART Controls and the SCE Controls, are selected with the nACE and nSCE register-bank selector inputs found in the Interface Description. If nACE is zero, the three least significant bits of ...
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... The IrCC SCE Registers are arranged in 7-byte blocks. Of the eight possible register blocks, five are used in this implementation. Table 13 - SCE Register Addressing BLOCK ADDRESS ...
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... The Master Block Control Register contains the IrCC Power Down bit, two reset bits, the Master Interrupt Enable bit, and the Register Block Select lines (Table 14). Table 14 - SCE Master Block Control Register Address Direction R/W power down Register Block Select, bits 0-2 The Register Block Select bits enable access to each of the eight possible register blocks ...
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Register Block Zero contains the SCE Data Register, the Interrupt Control/Status registers, the Line Control/Status registers, and the Bus Status register (Table 15). Address Directio R active frame 0 ...
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When this bit is one, an End of Message has occurred. The EOM indicates the end of an IrDA FIR EOF or Abort. During Consumer IR messages EOM also indicates FIFO underruns/ overruns and DMA Terminal Counts. Reading the Interrupt ...
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... SCE FIFO. The FIFO Reset bit is automatically set to zero following the re-initialization. Fast, bit 6 The Fast bit controls the state of an uncommitted IrCC output, Fast. The bit is read/write. General Purpose Data, bit 5 The General Purpose Data bit controls the state bit is read/write. ...
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... Brick Wall, bit 4 When the Brick Wall bit is active the IrCC sends back-to-back IrDA FIR frames separated by the number of additional flags specified in the brick wall count register. NOTE: BOF counts do not apply during brick walled messages ...
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BRICK DATA WALL DONE FIFO ENABLE BIT EMPTY Message Count, bits The four ...
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... The Time-Out bit is the IOCHRDY time-out error bit. The Time-Out bit when set to one indicates that an IOCHRDY time-out error has occurred. Time-Out is reset by the IrCC System Reset (see Interface Description) following a read of the Bus Status register, and following a Master Reset (see Master Block Control Register). ...
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... For example, if the IRRx pin in the Output Multiplexer is one and the Rx Polarity bit is zero, the signal is inactive and therefore decoded as a one. The IrCC Tx Polarity bit (bit 1) is equivalent to the Transmit Polarity bit in the configuration chip-level configuration space of earlier devices; ...
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... Inactive outputs depend on the state of the Tx Polarity bit when the Output Mux bits are both high, otherwise inactive outputs are always low. The Output Mux bits are equivalent to the 93X IR Option Register bits 6-7. The IR Table 21 - IrCC Output Multiplexer ...
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... FIFO Threshold values mode is enabled (Table 23). DMA Enable, bit 0 DMA Enable is connected to a signal in the Interface Description called DMAEN that is used by the chip-level interface to tristate the IrCC DMA controls when the DMA interface is inactive. When the DMA Enable bit is one, the one, the DMA host interface is active (Table 23) ...
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Register Block Two contains the Consumer IR Address Direction R/W sync bit R R Consumer ...
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... Register Block Three contains the IrCC Block Identifier Registers. These read-only registers Table 25 - Register Block Three Address Direction SMSC ID (Addresses The SMSC ID registers contain a 16-bit manufacturer identification code ...
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Register Block Four contains the IrDA control registers. These registers control the IrDA Table 26 - SCE Register Block Four Address Direction R/W 1.152 selec R ...
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SCE transmitter during loopback testing. NOTE: only the Tx Data Size register is used for IrDA FIR loopback ...
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... Addressing of the accessible registers of the Serial Port is shown below. The base addresses of the serial ports are defined by the configuration registers. The Serial Port registers are located at sequentially increasing addresses above these base addresses. The SMSC IrCC UART register set is described below REGISTER NAME ...
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... Disabling the interrupt system inhibits the Interrupt Identification Register and disables any Serial Port interrupt out of the SMSC IrCC. All other system functions operate in their normal manner, including the Line Status and MODEM Status Registers ...
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Setting this bit to a logic "1" clears all bytes in the XMIT FIFO and resets its counter logic to 0. The shift register is not cleared. This bit is self- clearing. Bit 3 Writting to this bit has no ...
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FIFO INTERRUPT MODE IDENTIFICATION ONLY REGISTER BIT 3 BIT 2 BIT 1 BIT INTERRUPT SET ...
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Address Offset = 3H, DLAB = 0, READ/WRITE This register contains the format information of the serial line. The bit definitions are: Bits 0 and 1 These two bits specify the number of bits in each transmitted or received serial ...
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This bit controls the Data Terminal Ready (nDTR) output. When bit 0 is set to a logic "1", the nDTR output is forced to a logic "0". When bit logic "0", the nDTR output is forced to ...
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FIFO it applies to. This error is indicated when the associated character is at the top of the FIFO. Bit 3 Framing Error (FE). Bit 3 indicates that the received character did not have ...
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MODEM changes state. They are reset to logic "0" whenever the MODEM Status Register is read. Bit 0 Delta Clear To Send (DCTS). Bit 0 indicates that the nCTS input to the chip has changed state ...
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The Reset Function Table (Table 30) details the effect of the Reset input on each of the registers of the Serial Port. FIFO INTERRUPT MODE OPERATION When the RCVR FIFO and receiver interrupts are enabled (FCR bit 0 = "1", ...
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XMITTER status via the LSR. LSR definitions for the FIFO Polled Mode are as follows: - Bit 0=1 as long as there is one byte in the RCVR FIFO. - Bits specify which error(s) have occurred. ...
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REGISTER/SIGNAL Interrupt Enable Register RESET Interrupt Identification Reg. RESET FIFO Control RESET Line Control Reg. RESET MODEM Control Reg. RESET Line Status Reg. RESET MODEM Status Reg. RESET TXD1, TXD2 RESET INTRPT (RCVR errs) RESET/Read LSR INTRPT (RCVR Data Ready) ...
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REGISTER ADDRESS* REGISTER NAME ADDR = 0 Receive Buffer Register (Read Only) DLAB = 0 ADDR = 0 Transmitter Holding Register (Write DLAB = 0 Only) ADDR = 1 Interrupt Enable Register DLAB = 0 ADDR = 2 Interrupt Ident. ...
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Table 31 - Register Summary For An Individual UART Channel (continued) BIT 2 BIT 3 Data Bit 2 Data Bit 3 Data Bit 2 Data Bit 3 Enable Enable Receiver Line MODEM Status Status Interrupt Interrupt (ELSI) (EMSI) Interrupt ID ...
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FIFO MODE OPERATION: GENERAL The RCVR FIFO will hold bytes regardless of which trigger level is selected. TX AND RX FIFO OPERATION The Tx portion of the UART transmits data through TXD as soon as the CPU ...
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IRQx nCTSx, nDSRx, nDCDx t2 IRQx nIOW IRQx nIOR nRIx FIGURE 19 - SERIAL PORT TIMING ...
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DESCRIPTION The SCE is a half-duplex synchronous serial communications controller that controls data flow between the Bus Interface I/O block and the IrDA FIR and Consumer IR (TV 8 Transmit Controls 8 Receive FIGURE 20 - SCE BLOCK DIAGRAM FRAMING ...
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Transmit nActiveFrame goes active as soon as the Consumer IR transmitter starts modulating the SCE data stream. nActiveFrame becomes inactive as soon as the transmit register is empty. Receive nActiveFrame goes active as soon as the Consumer IR receiver detects ...
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The SCE IrDA-mode transmitter is enabled by setting the appropriate SCE MODES bits in SCE Line Control Register B. If the FIFO Threshold is zero, message transmission begins as soon as transmit mode has been enabled and there is data ...
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BOF Active Frame EOM EOM Interrupt Tx Enable Data Done FIFO Empty FIGURE 24 - IrDA FIR TX MESSAGE TIMING (SOFTWARE CRC) When active, the DATA DONE flag in Register Block Zero, Line Control Register A alerts the transmitter that ...
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... FIFO Full EOM Interrupt Active Frame Int. Rx Enable FIGURE 27 - IrDA FIR RX ABORT ON OVERRUN TIMING indicators in the IrCC registers. When a valid BOF is detected, the EOM from the previous message is disabled, errors are reset, and an The nActive Frame Interrupt is sent (Figure 26). EOM and the EOM Interrupt are enabled following an active FCS ...
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During transmit if the CRC Select control is low the FCS is assumed to be part of the message payload data sent from the Host and the hardware CRC generator is not engaged (Figure FIFO Empty EOM CRC Select Data ...
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... The IrDA FIR pulse and signaling violations listed in this section are considered framing errors. When the Frame Error bit in the IrCC Line Status register is one, a framing error has occurred. The IrDA receiver response to framing errors depends upon when the errors occur. Framing ...
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Active Frame FIFO Empty EOM Interrupt Tx Enable Tx Reg. Empty FIGURE REMOTE TRANSMIT TIMING Receive Timing The SCE TV Remote receiver can be enabled with the configuration register SCE Modes bits, polled using programmed I/O, and ...
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The SCE TV Remote receiver will abort on a FIFO Overrun condition. When the overrun Zero D etect Activ e Fram e Activ e Fram e Int. FIFO Full E OM Interrupt R x Enable FIGURE REMOTE ...
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The FIFO must be loaded with the appropriate transmit data while the Block Control bits in SCE Configuration Register A are set to the required transfer mode with the SCE MODES bits set to Transmit/Receive Disabled. Enough room must remain ...
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... Transmit in Figure 34, above, can be satisfied by the inverse of the SCE Modes msb; e.g., nD7. The Databus Multiplexer provides exclusive ISA Bus access to either the 16550A UART or the IrCC SCE depending on the state of Block Mode Controls in the configuration registers. Disabled blocks are tristated from the ISA Bus. SCE ...
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Host/ SCE access timing, and during loopback tests with synchronous SCE- only access timing where the FIFO is simultaneouly used for transmit and receive. FIFO controls include, separate read/ write lines, FIFO Full and FIFO Not Empty flags, ...
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Data Bytes in FIFO TxServReq FIFO Int. Enable FIFO Interrupt 1st Service Request FIGURE 35 - FIFO INTERRUPT EXAMPLE DMA The DMA channel works in Single-Byte and Burst ...
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DMA Burst mode is enabled by setting the DMA Burst bit in SCE Configuration Register B. Demand Mode DMA transfers data ...
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Disable 32-Clk Countdown & Reset 32-Clk Counter DMA Burst DMA Enable Refresh Interval FIGURE I/OX CLOCK DMA REFRESH COUNT TIMING Burst Mode Transmit Uses FIFO Threshold for Triggered Transmit. The IrDA 4PPM transmit encoder can deplete the ...
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...
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Programmed I/O mode is selected when the DMA Enable bit in SCE Configuration Register B is zero trin pty FIGURE ...
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String Move DMA Enable FIFO FULL IOW FIFO Data WRITE FIGURE 43 - PROGRAMMED I/O WRITE TIMING FIFO Interrupt Interface Transmit Description Transmitting messages with Programmed I/O using FIFO Interrupt requires writing a fixed number of data bytes, usually related ...
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Receive Description Receiving messages with Programmed I/O using FIFO Interrupt requires reading a fixed number of data bytes, usually related to the threshold, whenever the FIFO Interrupt becomes active. An appropriate FIFO Threshold value allows the host to efficiently satisfy ...
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String M ove FIFO Not Empty IOCHRDY FIGURE 46 - VALID I/O READ READY CYCLE IOCHRDY Timer The 10us IOCHRDY Timer is initialized when IOCHRDY is active. The timer count sequence is activated when IOCHRDY goes inactive. IOCHRDY becomes active ...
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... IrCC to indicate that an access cycle shorter than the standard I/O cycle can be executed. NOTE: the names nSRDY & nNOWS can be used interchangeably. nSRDY is enabled by the No Wait bit in SCE No Wait nSRDY The Interaction of nSRDY and IOCHRDY nSRDY and IOCHRDY determine the three types ...
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... Consumer IR TV remote controls. There are GP Data pins that always reflects the state of General Purpose Data & Fast bits (5-6) of Line Control Register A, in Register Block Zero, Address Four. The state of the G.P. Data pins is independent of the IrCC Block Controls or the Output Multiplexer. Block Tx Output Rx Aux ...
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... Table 33 - IrCC Address Decode at '400'hex HEX ADDRESS 2F8 - 2FF 6F8 - 6FF All other registers in the IrCC register banks (Figure 50). Table 33 illustrates a chip-level IrCC address decoder using a base address of 2F8 for the ACE UART and 2F8+400 or 6F8 for the SCE registers. ACE ...
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IR RX PULSE REJECTION ENCODER 4PPM HDLC 1.152Mbps HDLC .576Mbps IrDA SIR Consumer IR IRDA 4PPM Bit Rate Tolerance TBD of Bit Rate Rx Pulse Width Single Pulse Double Pulse IRDA HDLC Bit Rate Tolerance TBD of Bit Rate Max ...
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... CONSEQUENTIAL DAMAGES; OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON CONTRACT; TORT; NEGLIGENCE OF SMSC OR OTHERS; STRICT LIABILITY; BREACH OF WARRANTY; OR OTHERWISE; WHETHER OR NOT ANY REMEDY OF BUYER IS HELD TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, AND WHETHER OR NOT SMSC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IrCC Rev. 5/10/96 ...