Cirrus-logic CS8130 Manuale Utente

Features••Adds IR port to standard UART••IrDA, HPSIR, ASK (CW) & TV remotecompatible••1200bps to 115kbps data rate••Programmable Tx LED power••Pro

Mode 3 (TV remote) Receive ChoicesThe modulation frequency must be set into themodulator divider registers. The tolerance on theexpected frequency mus

then switch to "programmed T period" mode toreduce processing overhead in the host CPU.Clock GenerationThe primary clock required is 3.6864

ResetBringing the RESET pin low will force the inter-nal logic, including the control registers, into aknown state, provided the PWRDN pin is high.RES

BIT NAMEVALUEFUNCTIONAD3-0 Register Address(4 bits oftransmitted address+ MSB, which is theshadow (SHDW) bitstate [Control Reg#3]. All registershave 4

Register 0, Control Register #1D3 D2 D1 D0ECHO 0 RXEN TXEN0000RegisterReset (R)BIT NAME VALUE FUNCTIONECHO Echo ControlCharacters01R Do not echo contr

Register 2, Transmit Mode Register #1D3 D2 D1 D0DIR TVR PWID MODU0000RegisterReset (R)BIT NAME VALUE FUNCTIONDIR Direct Mode Enable 01R Mode 4 Direct

Register 5, Receive Mode RegisterD3 D2 D1 D0RTVR RMOD RWIDS RWIDL0011RegisterReset (R)BIT NAME VALUE FUNCTIONRTVR,RMOD,RWIDS,RWIDLReceive Mode 0000000

Register 8, Baud Rate Divider Register #1D3 D2 D1 D0BR3 BR2 BR1 BR00111RegisterReset (R)BIT NAME VALUE FUNCTIONBR7-0 Baud Rate DividerValue (BRD).BRD=

Register 15, Status RegisterD3 D2 D1 D00 OSCR ERR DMOD000RegisterReset (R)BIT NAME VALUE FUNCTIONOSCR Oscillator runningflag01Oscillator not running,

Register 16, TV Remote Receive Timing Register #1D3 D2 D1 D0TVR3 TVR2 TVR1 TVR01111RegisterReset (R)BIT NAME VALUE FUNCTIONTVR11-0 TV remote moderecei

TRANSMITTER DRIVER CHARACTERISTICS (TA = 25 °C; All V+ = 3.0V, Digital Input Levels: Logic 0 = 0V,Logic 1 = V+; unless otherwise specified)Parameter S

Register 19, TV Remote Transmit Bit Rate Divider Register #1D3 D2 D1 D0TBR3 TBR2 TBR1 TBR01111RegisterReset (R)BIT NAME VALUE FUNCTIONTBR7-0 TV remote

Register 28, CS8130 Silicon Revision RegisterD3 D2 D1 D0REV3 REV2 REV1 REV0RegisterBIT NAME VALUE FUNCTIONREV3-0 CS8130 siliconrevision level0000 1st

Grounding & Layout Grounding and layout for the CS8130 are criti-cal, because of the sensitive nature of the PINdiode amplifier. The CS8130 should

VA+ VD+AGNDPINCPINALED1CLED2CRESETTGND1 TGND2 DGNDEXTCLKXTALINXTALOUTRXDFORM/BSYTXDD/CPWRDNCLKFR812576141917181316141510923200.1 µF+10 µF+3V0.1 µF+10

VA+ VD+AGNDPINCPINALED1CLED2CRESETTGND1 TGND2 DGNDEXTCLKXTALINXTALOUTRXDFORM/BSYTXDD/CPWRDNCLKFR81257614111917181316141510923200.1 µF+10 µF+3V0.1 µF+1

Power SuppliesVD+ - Digital Positive Supply.Digital positive supply voltage. Nominally +3VVA+ - Analog Positive Supply.Analog positive supply voltag

Digital PinsRXD - Receiver Data OutputReceiver output data. Normally connected to RxD on the UART.TXD - Transmit Data InputTransmitter input data. Nor

4420 PIN SSOP28 PIN SSOPEAADEA11SIDE VIEWEND VIEWTOP VIEWSeating PlaneNotes:1. "D" and "E " are reference datums and do

Smart AnalogTM is a Trademark of Crystal Semiconductor CorporationCS813028 DS134F1ORDERING INFORMATION ENVIRONMENTAL, MANUFACTURING, & HANDLING IN

POWER SUPPLY SPECIFICATIONS (TA = 25°C; V+ = 3.0V, Digital Input Levels: Logic 0 = 0V, Logic 1 = V+,Note 7)Parameter Symbol Min Typ Max UnitsPower Sup

ABSOLUTE MAXIMUM RATINGS (All voltages with respect to 0V)Parameter Symbol Min Max UnitsPower Supplies -0.3 6.0 VInput Current Except Supply Pins &am

VA+ VD+AGNDPINCPINALED1CLED2CTGND1TGND2 DGND CLKFRPWRDND/CTXDXTALOUTXTALINFORM/BSYRXDCS8130To LED10 µF+3.0V supplyTGND1, 20.1 µFFerriteBead10 ΩPINDiod

OVERVIEW The CS8130 is an infrared transceiver I.C. Thereceive channel includes on-chip high gain PINdiode amplifier, IrDA, HP-SIR, 500 kHz Ampli-tude

TRANSMITTERTXD101OnOff* LED OutputPIN InputLightNo LightRECEIVER** RXDABA: 1/baud rateB: 3/16 of 1/115200 or 3/16 of A (selectable)C: 3/16 of 1/11

then the RXD pin will oscillate at the carrier fre-quency. Transmit PathData for transmission is input to the CS8130 onthe TXD pin. The selected modul

The modulation frequency is determined by themodulator divider registers. The transmit bit rateis determined by the TV Remote transmit bit ratedivider