ST RIVA 128ZX User Manual

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

128-BIT 3D MULTIMEDIA ACCELERATOR

KEY FEATURES

• Fast32-bit VGA/SVGA

• High performance 128-bit 2D/GUI/DirectDraw

Acceleration

• Interactive, Photorealistic Direct3D Accelera-

tion with advanced effects

• Pinout backwardscompatible with RIVA 128

• Massive 1.6Gbytes/s, 100MHz 128-bit wide

8MByte SGRAM framebufferinterface

• Adds 16Mbit SDRAM support for cost sensitive

8MByte framebuffer applications

• Video Acceleration for DirectDraw/DirectVideo,

MPEG-1/2 and Indeo

- Planar 4:2:0 and packed 4:2:2 Color Space Conversion

- X and Y smooth up and down scaling

• 250MHz Palette-DAC supporting up to

1600x1200@85Hz

• NTSC and PAL output with flicker-filter

• Multi-function Video Port and serial interface



RIVA 128ZX

PRELIMINARY DATA

• Bus mastering DMA Accelerated Graphics Port

(AGP) 1.0 Interface supporting 133MHz 2X data transfer mode

• Bus mastering DMA PCI 2.1 interface

• ACPI power management interface support

• 0.35 micron 5LM CMOS

• 300 PBGA

DESCRIPTION

The RIVA128ZX offers unparalleled 2D and 3D performance, meeting all the requirements of the mainstream PC graphics market and Microsoft’s PC’97. RIVA128ZX combines all the features of RIVA 128 plus 8MByte SDRAM and SGRAM based framestore support and AGP2X datatransfer. It provides the most advanced Direct3D acceleration solution and delivers leadership VGA, 2D and Video performance, enabling a range of applications from 3D games through to DVD, Intercast and video conferencing.

BLOCK DIAGRAM

PCI/AGP

1.6 GByte/s Internal Bus Bandwidth

Host

Interface

FIFO/

DMA

Pusher

VGA

DMA Bus

Internal Bus

Video Port

DMA Engine

Graphics Engine

128 bit 2D

Direct3D

DMA Engine

Palette DAC

YUV - RGB,

X & Y scaler

8MByte

SDRAM/SGRAM

Interface

CCIR656

Video

Monitor/

128 bit

interface

June 1998 The information inthis datasheet is subject to change

7071857 00

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RIVA128ZX 128-BIT 3D MULTIMEDIA ACCELERATOR

TABLE OF CONTENTS

1 RIVA128ZX 300PBGA DEVICE PINOUT....................................................................................... 4

2 PIN DESCRIPTIONS ...................................................................................................................... 5

2.1 ACCELERATED GRAPHICS PORT (AGP) INTERFACE..................................................... 5

2.2 PCI 2.1 LOCALBUS INTERFACE........................................................................................ 5

2.3 FRAMEBUFFER INTERFACE .............................................................................................. 7

2.4 VIDEO PORT......................................................................................................................... 7

2.5 DEVICE ENABLE SIGNALS.................................................................................................. 8

2.6 DISPLAY INTERFACE.......................................................................................................... 8

2.7 VIDEO DAC AND PLL ANALOG SIGNALS .......................................................................... 8

2.8 POWER SUPPLY..................................................................................................................8

2.9 TEST...................................................................................................................................... 9

3 OVERVIEW OF THE RIVA128ZX .................................................................................................. 10

3.1 BALANCED PC SYSTEM...................................................................................................... 10

3.2 HOST INTERFACE ............................................................................................................... 10

3.3 2D ACCELERATION............................................................................................................. 11

3.4 3D ENGINE ........................................................................................................................... 11

3.5 VIDEO PROCESSOR............................................................................................................ 11

3.6 VIDEO PORT......................................................................................................................... 12

3.7 DIRECT RGB OUTPUT TO LOW COSTPAL/NTSC ENCODER ......................................... 12

3.8 SUPPORT FOR STANDARDS.............................................................................................. 12

3.9 RESOLUTIONS SUPPORTED.............................................................................................. 12

3.10 CUSTOMER EVALUATION KIT............................................................................................ 13

3.11 TURNKEY MANUFACTURING PACKAGE........................................................................... 13

4 ACCELERATED GRAPHICS PORT (AGP) INTERFACE ............................................................. 14

4.1 RIVA128ZX AGP INTERFACE.............................................................................................. 15

4.2 AGP BUS TRANSACTIONS.................................................................................................. 15

5 PCI 2.1 LOCAL BUS INTERFACE................................................................................................. 23

5.1 RIVA128ZX PCI INTERFACE ............................................................................................... 23

5.2 PCI TIMING SPECIFICATION............................................................................................... 24

6 FRAMEBUFFER INTERFACE ....................................................................................................... 30

6.1 SDRAM INTERFACE ............................................................................................................ 31

6.2 SGRAM INTERFACE............................................................................................................ 32

6.3 SDRAM/SGRAM ACCESSES AND COMMANDS................................................................ 35

6.4 LAYOUT OF FRAMEBUFFER CLOCK SIGNALS ................................................................ 37

6.5 FRAMEBUFFER INTERFACE TIMING SPECIFICATION.................................................... 37

7 VIDEO PLAYBACK ARCHITECTURE........................................................................................... 42

7.1 VIDEO SCALER PIPELINE................................................................................................... 43

8 VIDEO PORT.................................................................................................................................. 45

8.1 VIDEO INTERFACE PORT FEATURES............................................................................... 45

8.2 BI-DIRECTIONAL MEDIA PORT POLLING COMMANDSUSING MPC .............................. 46

8.3 TIMING DIAGRAMS.............................................................................................................. 47

8.4 656 MASTER MODE............................................................................................................. 51

8.5 VBI HANDLING IN THE VIDEO PORT ................................................................................. 52

8.6 SCALING IN THE VIDEO PORT........................................................................................... 52

9 BOOT ROM INTERFACE...............................................................................................................53

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

10 POWER-ON RESET CONFIGURATION........................................................................................ 55

11 DISPLAY INTERFACE................................................................................................................... 57

11.1 PALETTE-DAC ...................................................................................................................... 57

11.2 PIXEL MODES SUPPORTED ............................................................................................... 57

11.3 HARDWARE CURSOR......................................................................................................... 58

11.4 SERIAL INTERFACE.............................................................................................................59

11.5 ANALOG INTERFACE .......................................................................................................... 60

11.6 TV OUTPUT SUPPORT........................................................................................................ 61

12 IN-CIRCUIT BOARD TESTING...................................................................................................... 63

12.1 TEST MODES ....................................................................................................................... 63

12.2 CHECKSUM TEST................................................................................................................63

13 ELECTRICAL SPECIFICATIONS .................................................................................................. 64

13.1 ABSOLUTE MAXIMUM RATINGS ........................................................................................ 64

13.2 OPERATING CONDITIONS.................................................................................................. 64

13.3 DC SPECIFICATIONS........................................................................................................... 64

13.4 ELECTRICAL SPECIFICATIONS.......................................................................................... 65

13.5 DAC CHARACTERISTICS .................................................................................................... 65

13.6 FREQUENCY SYNTHESIS CHARACTERISTICS................................................................ 66

14 PACKAGE DIMENSION SPECIFICATION.................................................................................... 67

14.1 300 PIN BALL GRID ARRAY PACKAGE .............................................................................. 67

15 REFERENCES................................................................................................................................ 68

16 ORDERING INFORMATION .......................................................................................................... 68

APPENDIX............................................................................................................................................... 69

A PCI CONFIGURATION REGISTERS............................................................................................. 69

A.1 REGISTER DESCRIPTIONS FOR PCI CONFIGURATION SPACE .................................... 69

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1 RIVA128ZX 300PBGA DEVICE PINOUT

∗ VDD VDD VDD VDD FBD[50] FBD[39] FBD[38]

FBCKE

128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

PCIAD[3] PCIAD[1]

STB0

AGPAD-

VDD FBD[97] FBD[127] FBD[126]

HOST-

CLAMP

HOSTVDD

HOST-

CLAMP

HOSTVDD

PCIAD[14] PCIAD[12] PCIAD[10] PCIAD[8]

PCI-

DEVSEL#

1234567891011121314151617181920

FBD[4] FBD[6] FBD[7] FBD[17] FBD[19] FBD[21] FBD[23] FBDQM[2] FBA[0] FBA[2] FBA[4] FBA[6] FBA[8] FBDQM[5] FBD[41] FBD[43] FBD[45] FBD[47] FBD[56] FBD[57]BFBD[3] FBD[5] FBD[16] FBD[18] FBD[20] FBD[22] FBDQM[0] FBA[9] FBA[1] FBA[3] FBA[5] FBA[7] FBCLK1 FBDQM[7] FBD[40] FBD[42] FBD[44] FBD[46] FBD[58] FBD[59]CFBD[1] FBD[2] FBD[28] FBD[27] FBD[26] FBD[25] FBD[15] FBD[13] FBD[11] FBD[9] FBDQM[1] FBWE# FBRAS# FBA[10] FBDQM[4] FBD[55] FBD[54] FBD[53] FBD[60] FBD[61]

FBCLK0 FBD[0] FBD[29] FBD[30] VDD FBD[24] FBD[14] FBD[12] FBD[10] FBD[8] FBDQM[3] FBCAS# FBCS0 FBCS1 FBDQM[6] VDD FBD[52] FBD[51] FBD[62] FBD[63]

SCL FBCLK2 FBD[31] VDD NIC VDD VDD VDD

MP_AD[6] NIC SDA FBCLKFB VDD VDD FBD[48] FBD[49] FBD[37] FBD[36]

MPFRAME# MP_AD[7] MP_AD[5] MP_AD[4] MPCLAMP VDD FBD[35] FBD[34] FBD[33] FBD[32]

MP_AD[2] MPSTOP# MPCLK MP_AD[3] VDD NIC FBDQM[12] FBDQM[14] FBDQM[15] FBDQM[13]

FBDQM[8] MPDTACK# MP_AD[1] MP_AD[0] GND GND GND GND FBD[118] FBD[119] FBD[105] FBD[104]KFBDQM[9] FBD[87] FBDQM[10] FBDQM[11] GND GND GND GND FBD[116] FBD[117] FBD[107] FBD[106]

NOTES

1 NIC = No Internal Connection. Do not connect to these pins. 2 VDD=3.3V ∗ Signals denotedwith an asterisk are defined for future expansion. See

HOST-

CLAMP

FBD[86] FBD[85] FBD[72] FBD[73] GND GND GND GND FBD[114] FBD[115] FBD[109] FBD[108]MFBD[84] FBD[83] FBD[74] FBD[75] GND GND GND GND FBD[112] FBD[113] FBD[111] FBD[110]NFBD[82] FBD[81] FBD[76] FBD[77] NIC NIC FBD[102] FBD[103] FBD[121] FBD[120]PFBD[80] FBD[71] FBD[78] FBD[79] VDD VDD FBD[100] FBD[101] FBD[123] FBD[122]RFBD[70] FBD[69] FBD[88] FBD[89] NIC NIC FBD[98] FBD[99] FBD[125] FBD[124]TFBD[68] FBD[67] FBD[90] VDD NIC HOSTVDD HOSTVDD

Pin Descriptions

, Section 2, page5 for details.

XTALOUT PCIRST# AGPST[1] PCIAD[30] PCIAD[26] PCICBE#[3] PCIAD[20] PCIAD[16] PCITRDY# PCIPAR HOSTVDD PCICBE#[0] FBD[96] VIDVSYNC VIDHSYNC

HOST-

CLAMP

FBD[66] FBD[65] FBD[92] FBD[91]

PCIAD[21] PCIAD[17] PCIIRDY# PCICBE#[1] PCIAD[13] PCIAD[9] PCIAD[4] PCIAD[0] PCIAD[7] PCIAD[5]

STB1

AGPAD-

FBD[64] FBD[95] RED DACVDD VREF PCIINTA# PCIGNT# AGPPIPE# PCIAD[28] PCIAD[24] PCIAD[22] PCIAD[18] PCIFRAME# PCISTOP# PCIAD[15] PCIAD[11] PCIAD[6] PCIAD[2] TESTMODE ROMCS#WFBD[93] FBD[94] BLUE COMP PLLVDD PCIREQ# AGPST[2] PCIAD[31] PCIAD[27]

PCIAD[29] PCIAD[25] PCIAD[23] PCIAD[19] PCICBE#[2]

AGPRBF#

PCIIDSEL/

GREEN GND RSET XTALIN PCICLK AGPST[0]

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

2 PIN DESCRIPTIONS

2.1 ACCELERATED GRAPHICS PORT (AGP) INTERFACE

Signal I/O Description

AGPST[2:0] I AGP status bus providing information fromthe arbiter to the RIVA128ZXon what it may

do. AGPST[2:0] only havemeaning to the RIVA128ZXwhen PCIGNT# is asserted. When PCIGNT# is de-asserted these signals have no meaning and must beignored.

000 Indicates that previouslyrequested low priority read or flushdata is being

returned to the RIVA128ZX.

001 Indicates that previouslyrequested high priority readdata is being returned to

the RIVA128ZX.

010 Indicates that the RIVA128ZX is to provide low priority write data fora previous

enqueued write command.

011 Indicates that the RIVA128ZXis to provide high priority write data for a previous

enqueued write command. 100 Reserved 101 Reserved 110 Reserved 111 Indicates that the RIVA128ZX has been given permission to start a bus transac-

tion. The RIVA128ZXmay enqueue AGP requests by asserting AGPPIPE#or

start a PCI transaction by asserting PCIFRAME#. AGPST[2:0] are always an

output from the Core Logic (AGPchipset) and an input to the RIVA128ZX.

AGPRBF# O Read Buffer Full indicates when the RIVA128ZXis ready to accept previously requested

low priority read dataor not. When AGPRBF# is asserted the arbiter is not allowed to return (low priority) read data to the RIVA128ZX.This signal should be pulled upvia a

4.7KΩ resistor (although it is supposed to be pulled up by the motherboard chipset).

AGPPIPE# O Pipelined Read is asserted byRIVA128ZX (when the current master) to indicate afull

width read addressis to be enqueued by the target.The RIVA128ZXenqueues one request each rising clockedge while AGPPIPE#is asserted. When AGPPIPE#is deasserted no new requests are enqueued across PCIAD[31:0]. AGPPIPE# is a sustained tri-state signal from the RIVA128ZXand is an inputto the target (the core logic).

AGPADSTB0, AGPADSTB1

I/O Bus strobe signals providing timing for AGP2X data transfermode on PCIAD[15:00] and

PCIAD[31:16] respectively. The agent that is supplying data drives these signals.

2.2 PCI 2.1 LOCAL BUS INTERFACE

Signal I/O Description

PCICLK I PCI clock. This signal provides timing forall transactions on the PCI bus, except for

PCIRST# and PCIINTA#. All PCI signals are sampled on the rising edgeof PCICLK and

all timing parametersare defined with respect to this edge.

PCIRST# I PCI reset. This signal is used to bring registers, sequencers and signalsto a consistent

state. When PCIRST# is asserted all output signals are tristated.

PCIAD[31:0] I/O 32-bit multiplexedaddress and data bus. A bus transactionconsists of anaddress phase

followedby one or more data phases.

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128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

Signal I/O Description

PCICBE[3:0]# I/O Multiplexedbus command and byte enable signals. During the address phase of a trans-

action PCICBE[3:0]# define the bus command, during the data phase PCICBE[3:0]# are used as byte enables. The byte enables are validfor theentire data phase and determine which bytelanes contain validdata. PCICBE[0]# applies tobyte 0 (LSB) and PCICBE[3]# applies to byte 3 (MSB). When connectedto AGPthese signals carry differentcommands thanPCI whenrequests are beingenqueued using AGPPIPE#. Validbyte information isprovided during AGPwrite transactions. PCICBE[3:0]# are not used during the return of AGP read data.

PCIPAR I/O Parity.This signal is the evenparity bit generated across PCIAD[31:0] and

PCICBE[3:0]#. PCIPAR is stable and valid one clock after the address phase. For data

phases PCIPAR is stable and validone clock after either PCIIRDY# is asserted on a write transaction or PCITRDY# is asserted on a read transaction. OncePCIPARis valid, it remains validuntil one clock after completion ofthe currentdataphase. The masterdrives PCIPARfor address and write data phases; the target drives PCIPAR for read data phases.

PCIFRAME# I/O Cycle frame.This signal is driven by the current master to indicate the beginning of an

access and itsduration. PCIFRAME# is asserted to indicate that a bustransaction is beginning. Data transferscontinue whilePCIFRAME# is asserted. When PCIFRAME# is deasserted, the transaction is in the finaldata phase.

PCIIRDY# I/O Initiator ready.This signalindicates theinitiator’s(bus master’s)ability to completethe cur-

rent data phase of the transaction. See extended description for PCITRDY#. When connected toAGP this signal indicates theinitiator (AGPcompliant master) isready

to provideall write datafor the current transaction. Once PCIIRDY# is asserted for a write operation, the master is not allowed to insert wait states. The assertion ofPCIIRDY# for reads, indicates that the master is ready to transfera subsequent block of read data. The master is never allowedto insert a wait state during the initial blockof a read transaction. However, it may insert wait states after each blocktransfers.

PCITRDY# I/O Targetready. This signal indicates thetarget’s (selected device’s) ability to complete the

current data phaseof the transaction. PCITRDY# is used in conjunction withPCIIRDY#. A data phase is completedon any clock

when both PCITRDY# and PCIIRDY# are sampled as being asserted. During a read, PCITRDY# indicates that valid data ispresent on PCIAD[31:0]. During a write,it indicates the target is prepared to accept data. Wait cycles are inserted until both PCIIRDY# and PCITRDY# are asserted together.

When connectedtoAGP thissignal indicates theAGP complianttarget is ready to provide read data for the entire transaction (when transaction cancomplete within four clocks) or is ready to transfera (initialor subsequent) block of data, when the transfer requiresmore than four clocks to complete. The target is allowed to insert wait states after each block transfers on both read and write transactions.

PCISTOP# I/O PCISTOP# indicates that the current target is requesting the master to terminate the cur-

rent transaction.

PCIIDSEL I Initialization device select. This signal is used as a chip select during configuration read

and write transactions. For AGP applicationsnote that IDSEL isnot a pin on the AGP connector. The RIVA128ZX

performs the deviceselect decode internally within its host interface. It is not required to connect the AD16signal to the IDSEL pin as suggested in the AGP specification.

PCIDEVSEL# I/O Deviceselect. Whenacting as an output PCIDEVSEL#indicates that the RIVA128ZX has

decoded the PCI address and isclaiming the current access as the target. As an input

PCIDEVSEL# indicates whetherany other device on the bushas been selected.

PCIREQ# O Request. This signalis asserted by the RIVA128ZXto indicateto the arbiter that it desires

to become master of the bus.

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

Signal I/O Description

PCIGNT# I Grant. This signal indicates to the RIVA128ZX that access to the bus has been granted

and it can now become bus master. When connectedto AGPadditional information isprovided on AGPST[2:0] indicating that the master is the recipient of previously requested read data (high or low priority), it is to provide write data (high or low priority), for a previously enqueued write command or has been given permission to start a bus transaction (AGP or PCI).

PCIINTA# O Interrupt request line. This opendrain output is asserted and deasserted asynchronously

to PCICLK.

2.3 FRAMEBUFFER INTERFACE

Signal I/O Description

FBD[127:0] I/O The 128-bitmemory data bus.

FBD[31:0] are also used to access up to 64KBytes of 8-bit ROM or Flash ROM, using FBD[15:0] as address ROMA[15:0], FBD[31:24] as ROMD[7:0], FBD[17] as ROMWE# and FBD[16] as ROMOE#.

FBA[10:0] O Memory Address bus. Configuration strapping options are also decoded on thesesignals

during PCIRST# as described in Section 10, page 55.

FBRAS# O Memory RowAddress Strobe forall memory devices. FBCAS# O Memory ColumnAddress Strobe for all memory devices. FBCS[1:0]# O Memory Chip Select strobes. For SDRAM the FBCS[1] pin providesthe memory’s inter-

nal bank select bit (BA/A11).

FBWE# O Memory Write Enablestrobe forall memory devices. FBDQM[15:0] O Memory Data/Output Enable strobes. FBCLK0,

FBCLK1, FBCLK2

FBCLKFB I Framebuffer clock feedback. FBCLK2 is fed back to FBCLKFB. FBCKE O Framebuffermemory clock enablesignal.

O Memory Clock signals. Separate clocksignals FBCLK0 and FBCLK1 are providedfor

each bank of memory forreduced clock skew and loading. Details ofrecommended memory clock layout are given in Section 6.4, page 37.

2.4 VIDEO PORT

Signal I/O Description

MP_AD[7:0] I/O Media Port 8-bit multiplexedaddress and data bus or ITU-R-656 video data bus when in

656 mode.

MPCLK I 40MHz Media Port system clock or pixelclock when in 656 mode. MPDTACK# I Media Port data transferacknowledgmentsignal. MPFRAME# O Initiates Media Port transfers when active, terminates transferswhen inactive. MPSTOP# I Media Port control signal used by the slave to terminate transfers.

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128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

2.5 DEVICE ENABLE SIGNALS

Signal I/O Description

ROMCS# O Enables reads from an external 64Kx 8 or 32Kx8 ROM or Flash ROM. This signalis used

in conjunction with framebuffer data lines as described abovein Section 2.3.

2.6 DISPLAY INTERFACE

Signal I/O Description

SDA I/O Used forDDC2B+ monitor communication and interface to video decoder devices. SCL I/O Used forDDC2B+ monitor communication and interface to video decoder devices. VIDVSYNC O Vertical sync supplied to thedisplay monitor.No bufferingis required. In TV mode this sig-

nal supplies composite sync to an external PAL/NTSCencoder.

VIDHSYNC O Horizontal sync supplied to the display monitor. No buffering is required.

2.7 VIDEO DAC AND PLL ANALOG SIGNALS

Signal I/O Description

RED, GREEN, BLUE

COMP - External compensation capacitor for the video DACs. This pin should be connected to

RSET - A precision resistor placed between this pin and GND sets the full-scale video DAC cur-

VREF - A capacitor should beplaced between this pin and GND as shown in Figure 66, page 60. XTALIN I A series resonantcrystal is connected between these two points to provide the reference XTALOUT O

O RGB display monitor outputs. These are software configurableto drive either a doubly ter-

minated or singly terminated 75Ω load.

DACVDD via the compensation capacitor, see Figure 66, page 60.

rent, see Figure66, page 60.

clock forthe internal MCLK andVCLK clock synthesizers,see Figure 66 and Table20, page 60. Alternately, an externalLVTTLclock oscillator output may be driven into XTA- LOUT, connecting XTALIN to GND.For designs supporting TV-out,XTALOUT should be driven by a reference clock as described in Section 11.6, page 61.

2.8 POWER SUPPLY

Signal I/O Description

DACVDD P Analog power supply for the video DACs. PLLVDD P Analog power supply forall clock synthesizers. VDD P Digital power supply. GND P Ground. MPCLAMP P MPCLAMP is connected to +5V to protect the 3.3V RIVA128ZXfrom external devices

which will potentially drive 5V signal levels onto the Video Port input pins.

HOSTVDD P HOSTVDD is connected to the Vddq 3.3 pins on the AGP connector. This is the supply

voltage forthe I/O buffers and is isolated from the core VDD.On AGP designs these pins are also connected to the HOSTCLAMP pins. On PCI designsthey are connected to the

3.3V supply.

HOSTCLAMP P HOSTCLAMP is the supply signalling rail protection for the host interface. In AGPdesigns

these signals areconnected to Vddq 3.3. For PCI designs they are connected to the I/O power pins (V

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(I/O)

128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

2.9 TEST

Signal I/O Description

TESTMODE I For designs which will be tested in-circuit, this pin should be connected toGND through a

10KΩ pull-down resistor, otherwise this pin should be connected directly to GND.When TESTMODE is asserted, MP_AD[3:0] are reassigned as TESTCTL[3:0] respectively. Information on in-circuit test is given in Section 12, page 63.

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128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

3 OVERVIEW OF THE RIVA128ZX

The RIVA128ZX is the first 128-bit 3D Multimedia Accelerator to offer unparalleled 2D and 3D performance, meeting all the requirements of the mainstream PC graphics market and Microsoft’s PC’97. The RIVA128ZX introduces the most advanced Direct3D acceleration solution and also delivers leadership VGA, 2D and Video performance, enabling a range of applications from 3D games throughto DVD, Intercast and video conferencing.

3.1 BALANCED PC SYSTEM The RIVA128ZX is designed to leverage existing

PC system resources such as system memory, high bandwidth internal buses and bus master capabilities. The synergy between the RIVA128ZX graphics pipeline architecture and that of the current generationPCI andnext generation AGPplatforms, defines ground breaking performance levels at the cost point currently required for mainstream PC graphics solutions.

Execute versus DMA models

The RIVA128ZXis architectedto optimize PC system resources in a manner consistent with the AGP “Execute” model. In this model texturemap data for 3D applications is stored in system memory and individual texels are accessed as needed by the graphics pipeline. This is a significant enhancement over the DMA model where entire texture maps are transferred into off-screen framebuffer memory.

The advantages of the Execute versus the DMA model are:

• Improved system performance since only the

required texels and not the entire texture map, cross the bus.

• Substantial cost savings since all the frame-

buffer is usable for the displayed screen and Z buffer andno part of it is required to be dedicated to texture storage or texture caching.

• There is no software overhead in the Direct3D

driver to manage texture caching between application memory and the framebuffer.

To extend the advantages of the Execute model, the RIVA128ZX’s proprietary texture cache and virtual DMA bus master design overcomes the bandwidth limitation of PCI, by sustaining a high texel throughput with minimum bus utilization.The host interface supports burst transactions up to 133MHz and provides over 400MBytes/s onAGP.

AGP accesses offer other performance enhancements sincethey are fromnon-cacheable memory (no snoop) and can be low priority to prevent processor stalls, or high priority to prevent graphics engine stalls.

Building a balanced system

RIVA128ZX is architected to provide the level of 3D graphics performance and quality available in top arcade platforms. To provide comparable scene complexity in the 1997 time-frame, processors will have to achieve new levels of floating point performance. Profiles have shown that 1997 mainstream CPUs will be able to transform over 1 million lit, meshed triangles/s at50% utilization using Direct3D. This represents an order of magnitude performance increase over anything attainable in 1996 PC games.

To build a balanced system the graphics pipeline must match the CPU’sperformance.It mustbe capable of rendering at least 1 million polygons/s in order to avoid CPU stalls. Factors affecting this system balance include:

• Direct3D compatibility. Minimizing the differ-

ences between the hardware interface and the Direct3D data structures.

• Triangle setup. Minimizing the number of for-

mat conversionsand delta calculations done by the CPU.

• Display-list processing. Avoiding CPU stalls by

allowing the graphics pipeline to execute independently of the CPU.

• Vertex caching. Avoids saturating the host in-

terface withrepeated vertices, lowering thetraffic onthe busandreducing systemmemory collisions.

• Host interface performance.

3.2 HOST INTERFACE The host interfaceboosts communicationbetween

the host CPU and the RIVA128ZX. The optimized interface performs burst DMA bus mastering for efficient and fast data transfer.

• 32-bit PCI version 2.1 or AGP version 1.0

• Burst DMA Master and target

• 33MHz PCI clock rate, 66MHz AGP clock rate

and AGP 2X mode

• Supports over 100MBytes/s with33MHz PCI to

over 400MBytes/s on AGP 2X mode

• Implements read buffer posting on AGP

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

•

Fully supportsthe “Execute” modelon both PCI and AGP

3.3 2D ACCELERATION The RIVA128ZX’s 2D rendering engine delivers

industry-leading Windows acceleration performance:

• 100MHz 128-bit graphics engine optimized for

single cycle operation into the 128-bit memory interface supporting up to 1.6GBytes/s

• Acceleration functions optimized for minimal

software overhead on key GDI calls

• Extensive support for DirectDraw in Windows95 including optimized Direct Framebuffer (DFB) access with Write-combining

• Accelerated primitives including BLT, transpar-

ent BLT, stretchBLT, points, lins, lines, polylines, polygons, fills, patterns, arbitrary rectangular clipping and improved text rendering

• Pipeline optimized for multiple color depths in-

cluding 8, 15, 24, and 30 bits per pixel

• DMA Pusher allows the 2Dgraphics pipeline to

load rendering methods optimizing RIVA128ZX/host multi-tasking

• Execution of all 256 Raster Operations (as de-

fined by Microsoft Windows) at 8, 15, 24 and 30-bit color depths

• 15-bit hardware color cursor

• Hardware color dithering

• Multi buffering (Double, Triple, Quad buffering)

for smooth animation

fers to Direct3D or similar APIs advanced triangle rendering capabilities:

• Rendering pipeline optimized for Microsoft’s

Direct3D API

• Perspective correct true-color Gouraud lighting

and texture mapping

• Full 32-bit RGBA texture filter and Gouraud

lighting pixel data path

• Alpha blending for translucency and transpar-

ency

• Sub-pixel accurate texture mapping

• Internal pixel path: up to 24bits, alpha: up to 8

bits

• Texture magnification filtering with high quality

bilinear filtering without performance degradation

• Texture minification filtering with MIP mapping

without performance degradation

• LOD MIP-mapping: filter shape is dynamically

adjusted based on surface orientation

• Texture sizes from 4 to 2048 texels in either U

or V

• Textures can be looped and paged in real time

for texture animation

• Perspective correct per-pixel fog for atmo-

spheric effects

• Perspective correct specular highlights

• Multi buffering (Double, Triple, Quad buffering)

for smooth 3D animation

• Multipass rendering for environmental mapping

and advanced texturing

3.4 3D ENGINE

Triangle setup engine

• Setup hardware optimized for Microsoft’s

Direct3D API

• 5Gflop floating point geometry processor

• Slope and setup calculations

• Accepts IEEE Single Precision format used in

Direct3D

• Efficient vertex caching

Rendering engine

The RIVA128ZX Multimedia Accelerator integrates an orthodox 3D rendering pipeline and triangle setup function which not only fully utilizes the capabilities of the Accelerated Graphics Port, but also supports advanced texture mapped 3D over the PCI bus. The RIVA128ZX 3D pipeline of-

3.5 VIDEO PROCESSOR The RIVA128ZX Palette-DAC pipeline accelerates

full-motion video playback, sustaining 30 frames per secondwhile retaining the highestquality color resolution, implementing true bilinear filtering for scaled video, and compensating for filtering losses using edge enhancement algorithms.

• Advanced support for DirectDraw (DirectVideo)

in Windows 95

• Back-end hardwarevideo scalingfor video con-

ferencing and playback

• Hardware color space conversion (YUV 4:2:2

and 4:2:0)

• Multi-tap X and Y filtering for superior image

quality

• Optional edge enhancement to retain video

sharpness

11/85

Supportfor scaledfield interframingfor reduced

•

motion artifacts and reduced storage

• Per-pixel color keying

• Multiple video windows with hardware color

space conversion and filtering

• Planar YUV12 (4:2:0) to/from packed (4:2:2)

conversion for software MPEG acceleration and H.261 video conferencing applications

• Accelerated playback of industry standard co-

decs including MPEG-1/2, Indeo, Cinepak

3.6 VIDEO PORT

The RIVA128ZX Multimedia Accelerator provides connectivity forvideo input devices suchas Philips SAA7111A, ITT 3225 and Samsung KS0127 through an ITU-R-656 video input bus to DVD and MPEG2 decodersthrough bidirectional mediaport functionality.

• Supported through VPE extensions to Direct-

Draw

• Supports filtered down-scaling and decimation

• Supports real time video capture via Bus Mas-

tering DMA

• Serial interface for decoder control

128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

3.7 DIRECT RGB OUTPUT TO LOW COST PAL/NTSC ENCODER

The RIVA128ZX has also been designed to interface to a standard PAL or NTSC television via a low cost TVencoder chip. InPAL or NTSC display modes the interlaced output is internally flicker-filtered and CCIR/EIA compliant timing reference signals are generated.

3.8 SUPPORT FOR STANDARDS

• Multimedia support for MS-DOS, Windows

3.11, Windows 95, and Windows NT

• Acceleration for Windows 95 Direct APIs in-

cluding Direct3D, DirectDraw and DirectVideo

• VGA and SVGA: The RIVA128ZX has an in-

dustry standard32-bit VGAcore andBIOS support. In PCI configuration space the VGA can be enabled and disabled independently of the GUI.

• Glue-less Accelerated Graphics Port (AGP 1.0)

or PCI 2.1 bus interface

• ITU/CCIR-656 compatible video port

• VESA DDC2B+, DPMS, VBE 2.0 supported

3.9 RESOLUTIONS SUPPORTED

Resolution BPP 2MByte 4MByte (128-bit) 8MByte (64-bit) 8MByte (128-bit)

4 120Hz 120Hz 120Hz 120Hz

640x480

800x600

1024x768

1152x864

1280x1024

1600x1200

1920x1080

1920x1200 1800x1440 16 - - 60Hz 60Hz

8 120Hz 120Hz 120Hz 120Hz 16 120Hz 120Hz 120Hz 120Hz 32 120Hz 120Hz 120Hz 120Hz

8 120Hz 120Hz 120Hz 120Hz 16 120Hz 120Hz 120Hz 120Hz 32 - 120Hz 120Hz 120Hz

8 120Hz 120Hz 120Hz 120Hz 16 120Hz 120Hz 120Hz 120Hz 32 - 100Hz 100Hz 100Hz

8 100Hz 100Hz 100Hz 100Hz 16 - 100Hz 100Hz 100Hz 32 - - t.b.d. 75Hz

8 85Hz 85Hz 85Hz 85Hz 16 - 85Hz 85Hz 85Hz 32 - - - 60Hz

8 - 85Hz 85Hz 85Hz 16 - - 85Hz 85Hz

8 - 75Hz 75Hz 75Hz 16 - - 75Hz 75Hz

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

3.10 CUSTOMER EVALUATION KIT A Customer Evaluation Kit (CEK) is available for

evaluating the RIVA128ZX. The CEK includes a PCI or AGP adapter card designed to support the RIVA128ZX feature set, an evaluation CD-ROM containing afast-installation application, extensive device drivers and programs demonstrating the RIVA128ZX features and performance.

This CEK includes:

• RIVA128ZX evaluation board and CD-ROM

• QuickStart install/user guide

• OS drivers and files

- Windows 3.11

- Windows 95 Direct X/3D

- Windows NT 3.5

- Windows NT 4.0

• Demonstration files and Game demos

• Benchmark programs and files

3.11 TURNKEY MANUFACTURING PACKAGE A Turnkey Manufacturing Package (TMP) isavail-

able to support OEM designs and development through to production. It delivers a complete manufacturable hardware and software solution that

allows an OEM to rapidly design and bring to volume an RIVA128ZX-based product.

This TMP includes:

• CD-ROM

- RIVA128ZX Datasheet and Application Notes

- OrCAD schematic capture and PADS layout design information

- Quick Start install/user guide/releasenotes

- BIOS Modification program, BIOS binaries, utilities and BIOS Modification Guide documentation

- Bring-up and OEM Production Diagnostics

- Software and Utilities

• OS drivers and files

- Windows 3.11

- Windows 95 Direct X/3D

- Windows NT 3.5

- Windows NT 4.0

• Content developer and WWW information

• Partner solutions

• Access to our password-protected web site for

upgrade files and release notes.

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128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

4 ACCELERATED GRAPHICS PORT (AGP) INTERFACE

The AcceleratedGraphics Port (AGP) is ahigh performance,component level interconnecttargeted at3D graphical display applications and based on performance enhancements to the PCI local bus.

Figure 1. System block diagram showing relationship between AGP and PCI buses

CPU

AGP

AGP chipsetRIVA128ZX

PCI

I/O I/O I/O

Background to AGP

Although 3D graphics acceleration is becoming a standard feature of multimedia PC platforms, 3D rendering generally has a voracious appetite for memory bandwidth.Consequently thereis upward pressure onthe PC’s memory requirement leading to higher billof materialcosts. These trends will increase, requiring high speed access to larger amounts of memory. The primary motivation for AGP therefore was to contain these costs whilst enabling performance improvements.

By providing significant bandwidth improvement between the graphics accelerator and system memory, someof the3D renderingdata structures can be shifted into main memory, thus relieving the pressure to increase the cost of the local graphics memory.

Texture data are the first structures targeted for shifting to system memory for four reasons:

1 Textures are generally read only, and therefore

do not have special access ordering or coherency problems.

2 Shifting textures balances the bandwidth load

between system memory and local graphics memory, since a well cached host processor has much lower memory bandwidth requirements than a 3D rendering engine. Texture accesscomprises perhapsthe largestsingle component of rendering memory bandwidth (compared with rendering,display and Z buffers), so avoiding loading or cachingtexturesin graphics

System

memory

local memory saves not only this component of local memory bandwidth, but also the bandwidth necessary to load the texture store in the first place. Furthermore, this data must pass through main memory anyway as it is loaded from a mass store device.

3 Texture size is dependent upon application

quality rather than on display resolution, and therefore subject to the greatest pressure for growth.

4 Texture data is not persistent; it resides in

memory only for the duration of the application, so any system memory spent on texture storage can be returned to the free memory heap when the application finishes (unlike display buffers which remain in use).

Other data structures can be moved tomain memory but the biggest gain results from moving texture data.

Relationship of AGP to PCI

AGP is a superset of the 66MHzPCI Specification (Revision 2.1) with performance enhancements optimized for highperformance 3D graphics applications.

The PCI Specification is unmodified by AGP and ‘reserved’ PCI fields, encodings and pins, etc. are not used.

AGP does not replace the need for the PCI bus in the system and the two are physically, logically, and electrically independent.As shown in Figure1

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

the AGP bridge chip and RIVA128ZX are the only devices on theAGP bus - all other I/O devices remain on the PCI bus.

The add-in slot defined for AGP uses a new connector body (for electrical signaling reasons) which is not compatible with the PCI connector;

transactions, where the address, wait and data phases need to complete before the next transaction starts. AGP transactionscan only accesssystem memory - not other PCI devices or CPU. Bus mastering accesses can be either PCI or AGPstyle.

PCI and AGP boards are not mechanically interchangeable.

AGP accesses differ from PCI in that they are pipelined. This compares with serialized PCI

Full details of AGP are given in the

Graphics Port InterfaceSpecification

by Intel Corporation.

4.1 RIVA128ZX AGP INTERFACE The RIVA128ZX glueless interface to AGP1.0 is shown in Figure 2.

Figure 2. AGP interface pin connections

PCIAD[31:0]

PCICBE[3:0]#

AGPST[2:0]#

AGPRBF#

AGPPIPE#

PCIDEVSEL#

PCIIRDY#

AGP bus

PCITRDY# PCISTOP#

PCIIDSEL

PCIPAR

PCIREQ# PCIGNT#

PCICLK

PCIRST#

PCIINTA#

RIVA128ZX

Accelerated

[3] published

4.2 AGP BUS TRANSACTIONS

AGP bus commands supported

The following AGP bus commands are supported by the RIVA128ZX:

- Read

- Read (hi-priority)

PCI transactions on the AGP bus

PCI transactions can be interleaved with AGP transactions including between pipelined AGP data transfers.A basic PCItransaction ontheAGP interface is shown in Figure 3. If the PCI target is a non AGP compliant master, it will not see AGPST[2:0] and the transaction appears to be on a PCI bus. For AGP aware bus masters, AGPST[2:0] indicate thatpermission touse theinterface has been granted to initiate a request and not to move AGP data.

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Figure 3. Basic PCI transaction on AGP

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PCICLK

PCIFRAME#

128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

PCIAD[31:0]

PCICBE[3:0]#

PCIIRDY#

PCITRDY#

PCIDEVSEL#

PCIREQ#

PCIGNT#

AGPST[2:0]

bus cmd

111 111 xxx xxx xxxxxx

data_pciaddress

BE[3:0]#

An example of a PCI transaction occurring between an AGP command cycle and return of data is shown in Figure 4. This shows the smallest number of cycles during which an AGPrequest can be enqueued, a PCI transaction performed and AGP read data returned.

Figure 4. PCI transaction occurring between AGP request and data

1 2345678910

PCICLK

AGPPIPE#

PCIFRAME#

PCIAD[31:0]

PCICBE#

PCIIRDY#

PCITRDY#

PCIDEVSEL#

PCIAGPRBF#

PCIREQ#

PCIGNT#

AGPST[2:0]

C9 pci_cmd BE 0000 000

111 xxx 111 111 xxx111

address data D7 +1

xxx 00x xxx xxx

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

Figure 5. Basic AGP pipeline concept

Bus Idle

Pipelined data transfer

Intervene cycles

A1 A2

Pipelined AGP requests

Data-1 Data-2

Pipeline operation

Memory access pipelining provides the main performance enhancement of AGP over PCI. AGP pipelined bus transactions share most of the PCI signal set, and are interleaved with PCI transactions on thebus.

The RIVA128ZX supports AGP pipelined reads with a 4-deep queue of outstanding read requests. Pipelined reads are primarily used by the RIVA128ZX for cache filling, the cache size being optimized for AGP bursts. Depending on the AGP bridge, abandwidth ofup to 248MByte/s isachievable for 128-byte pipelined reads. This compares with around 100MByte/s for 128-byte 33MHz PCI reads. Another feature of AGP is that for smaller sized reads the bandwidth is not significantly reduced. Whereas 16-byte reads on PCI transfer at around 33MByte/s, on AGP around 175MByte/s is achievable. The RIVA128ZX actually requests reads greater than 64 bytes in multiplesof 32-byte transactions.

The pipedepth canbe maintained bythe AGP bus master (RIVA128ZX) intervening in a pipelined transfer to insert new requests between data replies. This bus sequencing is illustrated in Figure

5. When the bus is in an idle condition, the pipe can

be started by inserting one or more AGP access requests consecutively. Once the data reply to those accesses starts, that stream can be broken (or intervened) by the busmaster (RIVA128ZX) inserting one or more additional AGP access requests or inserting a PCI transaction. This intervention is accomplished with the bus ownership signals, PCIREQ# and PCIGNT#.

Data-3

Data

PCI transaction

The RIVA128ZX implements both high and low priority reads depending of the status of the rendering engine. Ifthe pipeline is likely to stall due to system memory read latency, a high priority read request is posted.

Address Transactions

The RIVA128ZX requests permission from the bridge to use PCIAD[31:0] to initiate either an AGP request or a PCI transaction by asserting PCIREQ#. The arbiter grants permission by asserting PCIGNT# with AGPST[2:0] equal to ”111” (referred to as START). Whenthe RIVA128ZX receives START it must start thebus operation within two clocks of the bus becoming available. For example, whenthe busis inan idle conditionwhen START is received, the RIVA128ZX must initiate the bus transaction on the next clock and the one following.

Figure 6 shows a single address being enqueued by the RIVA128ZX. Sometime before clock 1, the RIVA128ZX asserts PCIREQ# to gain permission to usePCIAD[31:0]. Thearbiter grants permission by indicating START on clock 2. A new request (address, command and length) are enqueued on each clock in which AGPPIPE# is asserted. The address of the request tobe enqueued is presented onPCIAD[31:3], thelength on PCIAD[2:0] and the command on PCICBE[3:0]#. In Figure 6 only a single address is enqueued since AGPPIPE# is just asserted for a single clock. The RIVA128ZX indicates that the current address is the last it intends to enqueue when AGPPIPE# is asserted and PCIREQ# is deasserted (occurring on clock

3). Once the arbiter detects the assertion of AGP- PIPE# or PCIFRAME# it deasserts PCIGNT# on clock 4.

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Figure 6. Single address - no delay by master

12345678

PCICLK

AGPPIPE#

128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

PCIAD[31:0]

PCICBE[3:0]#

PCIREQ#

PCIGNT#

AGPST[2:0]

111 111 xxx xxx xxxxxx xxx xxx

Figure 7 showsthe RIVA128ZXenqueuing 4 requests, where the first request is delayed bythe maximum 2 cycles allowed. START is indicated on clock 2, but the RIVA128ZX does not assert AGPPIPE# until clock 4. Note that PCIREQ# remainsasserted on clock 6 toindicate that thecurrent request is not the last one. When PCIREQ# is deasserted onclock 7 with AGPPIPE# still assertedthis indicates thatthe current address is the last one tobe enqueuedduring thistransaction. AGPPIPE# must be deassertedon thenext clock when PCIREQ# is sampled as deasserted. If the RIVA128ZXwants to enqueue more requestsduring this bus operation, itcontinues assertingAGPPIPE# until all ofits requests areenqueued or until it has filled all the available request slots provided by the target.

Figure 7. Multiple addresses enqueued, maximum delay by RIVA128ZX

1234567

PCICLK

AGPPIPE#

PCIAD[31:0]

PCICBE#

PCIREQ#

PCIGNT#

AGPST[2:0]

C1 C2 C3 C4

111 111 111 xxx xxxxxx xxx xxx

A2 A3 A4

2X Data Transfers

2X data transfers are similar to 1X transfers except that an entire 8 bytes are transferred during a single PCICLK period. This requires that two 4 byte pieces of data are transferred acrossPCIAD[31:0] for each CLK period. A read data transfer is described followed by awrite transfer.

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

Figure 8. 2X Read data, no delay

1234567

PCICLK

PCIAD[31:0]

AGPADSTBx

AGPRBF#

PCITRDY#

PCIREQ#

PCIGNT#

R1 +5 +6 +7+2 +3 +4

AGPST[2:0]

00x xxx xxx xxx xxxxxx xxx

Figure 8shows 32 bytes being transferred during 4 clocks(compared with 16bytes inAGP 1x mode). The control signals are identical. The AGPAD_STBx signal has been added when data is transferred at 8 bytes per PCICLK period. AGPAD_STBx represents AGPAD_STB0 and AGPAD_STB1 and are used by the2X interface logicto indicatewhen valid data ispresenton theAD bus.Thecontrol logic (PCITRDY# in this case) indicates when data can be used by the target.

Figure 9. 2X Back to back read data, no delay

123456789

PCICLK

PCIAD[31:0]

AGPADSTBx

AGPRBF#

PCITRDY#

PCIGNT#

L6 +1 H5 +1

H4 +1 +L7 L8 +1 H6 +1 L9 +1

AGPST[2:0]

000 001 000 001 000xx 001 000 001

Figure 9 showsback to back 8 byteread transactions. AGPST[2:0]are shown toggling between “000”and “001” to illustrate thatthey are actually changing. However, theyare not required to change between high and low priority to do back to back transactions. In this diagram, PCITRDY# is asserted on each clock since a new transaction starts on each clock.

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Figure 10. 2X Basic write no delay

123456789

PCICLK

128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

PCIAD[31:0]

PCICBE#

AGPADSTBx

PCIIRDY#

PCITRDY#

PCIREQ#

PCIGNT#

AGPST[2:0]

xxx xxx 01x xxx xxxxx xxx xxx xxx

+2 +3 +4W1 +1 +5 +6 +7

BE BE BEBE BE BE BE BE

Figure 10is a basic write transaction thattransfers data at the2X rate. There is no difference in the control signals from AGP 1x mode - only more data is moved. The normal control signals determine when data is valid.

Figure 11. QuadWord writes back to back - no delays

123456789

PCICLK

PCIAD[31:0

PCICBE#

AGPADSTBx

PCIIRDY#

PCITRDY#

PCIGNT#

AGPST[2:0]

]

01x 01x 01x 01x xxxxx 01x 01x xxx

W5 +1 W7 +1W3 +1 W4 +1 W8 +1

W6 +1

BE BEBE BE BE BEBE BE BE BE BE BE

Figure 11 illustratesmultiple 8 bytewrite operationscompared with thesingle transfer shownin Figure 10. When the transactions are short, thearbiter is required to give grants onevery clock or the AD bus willnot be totally utilized.In this examplea new writeis started on eachrising clock edgeexcept clock 7,because the arbiter deasserted PCIGNT# on clock 6. Since a new transaction is started on each CLK, PCIIRDY# is only deasserted on clock 7.

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

AGP timing specification Figure 12. AGP clock specification

0.6VDD

PCICLK

0.5VDD

0.4VDD

0.3VDD

Table 1. AGP clock timing parameters

Symbol Parameter Min. Max. Unit Notes

CYC PCICLK period 15 30 ns

HIGH PCICLK high time 6 ns

LOW PCICLK low time 6 ns

PCICLK slew rate 1.5 4 V/ns 1

CYC tHIGH tLOW

2V p-to-p

(minimum)

0.2VDD

NOTES

1 This rise and fall time is measured across the minimum peak-to-peak range as shown in Figure12.

Figure 13. AGP timing diagram

AGPCLK

Output delay

Tri-state output

Input

tVAL

data1 data2

tOFF

tON

tSU

data1 data2

tVAL

Table 2. AGP timing parameters

Symbol Parameter Min. Max. Unit Notes

VAL AGPCLK to signal valid delay (data and control

signals)

ON Float to active delay 2 ns

OFF Active to float delay 28 ns

SU Input set up time to AGPCLK (data and control

signals)

HInput hold time from AGPCLK 0ns

211ns

7ns

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128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

Figure 14. AGP timing diagram (2X data transfer mode)

AGPCLK

Output data

Data1 Data2 Data3 Data4

tDVA

DVB

tTSF

tDVB

tDVA

tTSR

Output strobe

Input data

tRSH

Data1 Data2 Data3 Data4

tDH

tDSU

tDH

tRSSU

tDSU

Input strobe

Table 3. AGP timing parameters (2X data transfer mode)

Symbol Parameter Min. Max. Unit Notes

TSF AGPCLK to transmit strobe falling edge 2 12 ns

TSR AGPCLK to transmit strobe rising edge 20 ns

DVB Output data validbefore strobe 1.7 ns

DVA Output data validafter strobe 1.7 ns

RSSU Receiver strobe setup time to AGPCLK 6ns

RSH Receiver strobe hold time from AGPCLK 1ns

DSU Input data to strobe setup time 1 ns

DH Input data to strobe hold time 1 ns

Figure 15. AGP Strobe/Data turnaround timing diagram (2X data transfer mode)

AGPCLK

tOFFD tOND

PCIAD[31:0]

OFFS

tONS

AGPADSTBx

Table 4. AGP Strobe/Data turnaround timing parameters (2X data transfer mode)

Symbol Parameter Min. Max. Unit Notes

OND Float to active delay -1 9 ns

OFFD Active to float delay 1 12 ns

ONS Strobe active to strobe falling edge setup 6 10 ns

OS Strobe rising edge to strobe float delay 6 10 ns

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

5 PCI 2.1 LOCAL BUS INTERFACE

5.1 RIVA128ZX PCI INTERFACE The RIVA128ZXsupports a gluelessinterface to PCI 2.1 with both master andslave capabilities. Thehost

interface is fully compliant with the 32-bit PCI 2.1 specification. The Multimedia Accelerator supports PCI bus operation up to 33MHz with zero-wait state capability and

full bus mastering capability handling burst reads and burst writes.

Figure 16. PCI interface pin connections

PCIAD[31:0]

PCICBE[3:0]#

PCIFRAME#

PCIDEVSEL#

PCIIRDY#

PCI bus

PCITRDY# PCISTOP#

PCIIDSEL

PCIPAR

PCIREQ# PCIGNT#

PCICLK

PCIRST#

PCIINTA#

RIVA128ZX

Table 5. PCI bus commands supported by the RIVA128ZX

Bus master Bus slave

Memory read and write Memory read and write Memory read line I/O read and write Memory read multiple Configuration read and write

Memory read line Memory read multiple Memory write invalidate

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128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

5.2 PCI TIMING SPECIFICATION The timing specification of the PCIinterface takes the form of generic setup, hold and delay times of tran-

sitions to and from the rising edge of PCICLK as shown in Figure 17.

Figure 17. PCI timing parameters

PCICLK

VAL

Output timing parameters

Output delay

tON

tOFF

Tri-state output

PCICLK

Input timing parameters

tSU tH

Input

Table 6. PCI timing parameters

Symbol Parameter Min. Max. Unit Notes

VAL PCICLK to signal valid delay (bussed signals) 2 11 ns 1

(PTP)

VAL

ON Float to activedelay 2 ns

OFF Active to float delay 28 ns

SU Inputset up time to PCICLK (bussed signals) 7 ns 1

(PTP)

H Input hold time fromPCICLK 0ns

NOTE

PCICLK to signal valid delay (point to point) 2 12 ns 1

Input set up time to PCICLK (PCIGNT#)10 ns1 Input set up time to PCICLK (PCIREQ#)12 ns

1 PCIREQ# and PCIGNT# are point to point signals andhave different valid delay and input setup times than bussed sig-

nals. All other signals are bussed.

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128-BIT 3D MULTIMEDIA ACCELERATOR RIVA128ZX

Figure 18. PCI Target write - Slave Write (single 32-bit with 1-cycle DEVSEL# response)

PCICLK

PCIAD[31:0]

PCICBE[3:0]#

PCIFRAME#

PCIIRDY#

PCITRDY#

PCIDEVSEL#

address data

bus cmd BE[3:0]#

(med)

Figure 19. PCI Target write - Slave Write (multiple 32-bit with zero wait state DEVSEL# response)

PCICLK

PCIAD[31:0]

PCICBE[3:0]#

PCIFRAME#

address data0

bus cmd BE[3:0]#

data1 data2

BE[3:0]# BE[3:0]#

PCIIRDY#

PCITRDY#

PCIDEVSEL#

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128-BIT 3D MULTIMEDIA ACCELERATORRIVA128ZX

Figure 20. PCI Target read - Slave Read (1-cycle single word read)

PCICLK

PCIAD[31:0]

PCICBE[3:0]#

PCIFRAME#

PCIIRDY#

PCITRDY#

PCIDEVSEL#

address

bus cmd BE[3:0]#

data0

Figure 21. PCI Target read - Slave Read (slow single word read)

PCICLK

PCIAD[31:0]

PCICBE[3:0]#

PCIFRAME#

address

bus cmd BE[3:0]#

data0

PCIIRDY#

PCITRDY#

PCIDEVSEL#

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