Get Off the Bus and Call A TAXI

Transcription

1 Get Off the Bus and Call A Hot Chips Symposium August 21, 1990 PAUL SCOTT Design Engineering Manager Network Products Division Advanced Micro Devices and TAXJchp are trademarks of Advanced Micro Devices, nc. GET OFF THE BUS AND CALL A BUS NTERCONNECTS CAUSE COMMUNCATON BOTLE-NECKS LNKS CREATE PRVATE SERAL DATA CHANNELS OllER UNTS /O Oll-ER UNrTS J MAMD P. Scott 8/90

2 dmammmmmmmm dmammmmmmmm URQQャpャャャjュa URQ MMMMMM MMMMMM ゥエQュa wkiヲ wkiヲ won QqNQY QqNGY BGPYQBBXエエッM PRVATE SERAL LNK SYSTEM ARCHTECTURE COMPATBLTY SERAL LNK BANDWDTH NTEGRATON OF CLOCK GENERATON & RECOVERY MANY DATA TRANSMSSON RATES APPROPRATE NTERCONNECT MEDA & NTERFACE TECHNOLOGY FOR CHP DESGN & MANUFACTURE MNMUM BOARD SPACE REQUREMENT ー s TAXlchipTM SYSTEM BLOCK DAGRAM ransparent ウケョ ィイッョッオウュゥエエ イ Or ゥカ イ interface Parallel nput Paralel Output O! w i M エc ". w Serial Transmission Link z o t;c{s 0<2 0t:i w o '" : 8. ' OR :!llts tjl N : '2 TRANSMfTTER Ami'W-125 Ami'W-1715 ュa Am7916/#-2/!l) ュa Am7QS.W-tia) SERAL RATE 126-' (O.'JCAO uo 2l»2tiD BJ..6t1J lcj»o16cxj RECEVER Ami'QlWo125 Ami'QlWo1715 AtnJlllPl Am}QWo.CJ Arn tiD ュa AVALABLE P Scott 8190

3 dmammmmmmmmmm ] ]]]]]] Mi up ウO BGMLN PARALLEL NTERFACE SMPLE TO USE AS AN OCTAL REGSTER AUTOMATC MUX/DEMUX DATA & COMMAND STROBE ACK w ",..... HAND- SHAKE t latch' LOGC DECODER Am7968/ o m HTERFACE ASYNC Of SYNC NTERFACE AUTOMATC 'sm STUFRNG' CODE VOLATON ftc>lcator DATA CMD p-sec-tol CODES FACLTATE DATA TRANSFERS ENCODER EFFCENCY DETERMNES BANDWDTH REQUREMENT 'OUT-BAND-SGNALS' ENHANCE LNK BANDWDTH CODE CHARACTERSTCS DEFNE LNK LMTATONS REQUREMENT GROUP CODED & NAZ 1 = 'TRANSTON' 0 = 'NO TRANSTON' RUN LENGTH 4 or LESS USE 'LOWEST' OFFSET AVALABLE NO ALAS SYNC WTH LEGAL DATA MAXMZE ERROR DETECTON RESULT 48/58 & 58/68 CODES $20% OVERHEAD 8, 9, 10 BT DATA 8YTES 4, 3, 2 BT COMMAND SYMBOLS CODES SUPPORT NETWORK STANDARDS mamd MーscッエX OYP )

4 MMMMMMMMMMMM laaiᆪzi c so SERAL OUTPUT NTERNAL PLL GENERATES BT CLOCK FROM EXTERNAL BYTE FREQUENCY ENCODER ASSURES EFFCENT DATA TRANSFER WTH HGH TRANSTON DENSTY BVE RATE XTAL Pll CLOCK GENERATOR T!\X ENCODER SHFTER Am BULT N. BYTE RATf XTAL OSC m COMPA118LE BYTE RA1f NPUT AUTOMATCSVNC NSETmON J(D( ECL 0VTPtJT'S (+Sv REF) ' i NO EXTERNAL COMPONENTS t s ュ er J AMD p-sc-o,.,-,q-ro"" SERAL NPUT NTERNAL PLL SYNCHRONZES BT CLOCK WTH NCOMNG SERAL STREAM DECODER SEPARATES DATA FROM COMMAND AND FLAGS ERRORS SHFTER PlL CLOCK SYNCHRONZER... DECODER LATCH. RECEVER DECODER.--- OB. ᄋM N M Am NTEGRA1fD PL.L «J.J26 M:Jaud NO EXTERNAL C'CJ##ONENTS JffTER TOLERANCE (4OS/81) AUTOMA71C BYTE FRAMNG DETECTS CODE VCXA110NS MAMD MMMMMMMMMM ー MscMo ヲエ MX イッ B

5 MMMMMMMMMMMM G mssm laiヲi ェ RDGE SERAL NTERFACE ECl look OUTPUTS NTERFACE TO STANDARD OPTCAL MODULES LOW MPEDANCE DRVERS CAN DRVE long TRANSMSSON LNES TRANSMTTER OPTCAL NTERFACE. ' t MODULE.J.. TRANSMTTER 5'tGLE E/tDED Of OFFEREfTlAL All COMMON WRE MEDA NC..WNG COAX atd M1S7CD PAR REMOTE RECEVER AMD MMMMMMMMMMpMU MoLNMLNM ᄋ BL SERAL NTERFACE DFFERENTAL NPUT COMPATBLE WTH STANDARD OPTCAL MODULES HGH SENSTVTY AND WDE COMMON MODE RANGE ENCOURAGE WRE NTERCONNECT RECEVER *OPTCAL NTERFACE MODULE RECEVER REMOTE DRVER ae-waytj==...,,) MMMMMMMMMMMM AMD p sc ッ 8.90

6 MMMMMMMMMMM LNK LENGTH LMT BANDWDTH LMTED LNKS (COAX) CAUSE JTER N NORMAL DATA JTER LMTS THE LNK LENGTH BEFORE THE AMPLTUDE LMT NRZ 1 BT STREAM 000 DELAY (NOT JTTER) MMMMMMMMMMMM AMD p-sco-,,-tj:x>-., TAXlchip LNE LENGTH TRANSMSSON UNE CHARACTERSTCS UMT LENGTH EACH TYPE HAS DFFERENT ECONOMC & PERFORMANCE TRADEOFFS : w 60 a: e( 50. t- e( o MAXMUM COAX LENGTH (tt) /UNCOMPENSATED JTTER BOUNDED Llt.t/Tl M AMD MMMMMMMMMp N sc ッ M エエ MXAAQQAQAAOYP

7 MMMMM eイy TAXlchip POWER BUS PARTTON TTL & ECL /O NOSE SOLATED FROM CORE BY BUS SEPARATON NTERFACES BETWEEN /O AND NTERNAL LOGC & PLL ARE DFFERENTAL NTERNAL CURRENT TRANSENTS CREATE NOSE VOLTAGES N LEAD NDUCTANCE CML AND PLL CRCUTS CAUSE MNMAL NTERNAL NOSE vee vee vee vee vee GND GND GND GND AMD MMMMMMMMBABB p Scott 8/90 TAXlchip PRODUCT PARTTON REDUCE DATA CORRUPTON CAUSED BY CROSSTALK MNMZE NTERFACE DATA RATE SELECT BLOCKS FOR EFFCENT, MANUFACTURABLE NTEGRATON MNMZE CHP COUNT AND NTERFACE PN COUNT MUD RATE L. _ UAA1ExN HOST SPECFC LOGC N-BVTESWORD N BYTES L-M+2 (BTSJENCOOED BYTE)..._---- BUS AA1E AMD HOST SPECFC LOGC N BYTES::JlllilL WD!WE "," t; ) p Scott 8/90

8 dmammmmmmmm MMMMMM BNPYOXエイッ chip SERAL LNK SOLUTONS FLEXBLE SYSTEM NTERFACE DRVES TRANSMSSON LNES or OPTCAL MODULES PLLs WTH NO EXTERNAL COMPONENTS NTERNAL BT RATE CLOCK GENERATOR NTEGRATED CLOCK/DATA RECOVERY PLL WDE FREQUENCY RANGE MATURE C TECHNOLOGY FOR MANUFACTURABLTY ー s TAXlchip SPEED LMTS s ADDRESS SPECFC DATA COMMUNCATON REQUREMENTS SPEEDS DEFNED BY NTERFACE LMTATONS AND SYSTEM CONVENTONS PRODUCTS PARTTONED FOR COST EFFECTVE SYSTEM SOLUTONS { ᄃ qi Am79268/2b9 ( Am79168/UR ( Mboud) Am79G368/369 (10)>1500 Mboud) i i [ (XX) DATA RATE (Mbaud) MMMMMMMMamd p.sc-o>t-8/x'"