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XAUI v12.3 Product Guide

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PG053 April 6, 2016

Appendix C:

Debugging Designs

What Can Cause Synchronization and Alignment to Fail?

Synchronization (

debug[4:1]

) occurs when each respective XAUI lane receiver is

synchronized to byte boundaries. Alignment (

debug[5]

) occurs when the XAUI receiver is

aligned across all four lanes.

Following are suggestions for debugging loss of Synchronization and Alignment:

• Monitor the state of the

signal_detect[3:0]

input to the core. This should either

be:

• connected to an optical module to detect the presence of light. Logic 1 indicates that

the optical module is correctly detecting light; logic 0 indicates a fault. Therefore,

ensure that this is driven with the correct polarity.

• tied to logic 1 (if not connected to an optical module).

Note:

When

signal_detect

is set to logic 0, this forces the receiver synchronization state machine

of the core to remain in the loss of sync state.

• Loss of Synchronization can happen when invalid characters are received.
• Loss of Alignment can happen when invalid characters are seen or if an /A/ code is not

seen in all four lanes at the same time.

• See the following section,

Problems with a High Bit Error Rate

Transceiver Specific

• Ensure that the polarities of the txn/txp and rxn/rxp lines are not reversed. If they are,

these can be fixed by using the

txpolarity

and

rxpolarity

ports of the transceiver,

which can be accessed from outside the core by enabling the transceiver control and

status port option.

• Check that the transceiver is not being held in reset or still be initialized by monitoring

the

mgt_tx_reset

mgt_rx_reset

, and

mgt_rxlock

input signals to the XAUI

encrypted HDL. The

mgt_rx_reset

signal is also asserted when there is an RX buffer

error. An RX buffer error means that the Elastic Buffer in the receiver path of the

transceiver is either under or overflowing. This indicates a clock correction issue caused

by differences between the transmitting and receiving ends. Check all clock

management circuitry and clock frequencies applied to the core and to the transceiver.

What Can Cause the XAUI Core to Insert Errors?

On the receive path the XAUI core will insert errors RXD=FE, RXC=1, when disparity errors or

invalid data are received or if the received interframe gap (IFG) is too small.

Send Feedback

Содержание LogiCORE IP

Страница 1: ...XAUI v12 3 LogiCORE IP Product Guide Vivado Design Suite PG053 April 6 2016...

Страница 2: ...gning with the Core Use the Example Design as a Starting Point 70 Know the Degree of Difficulty 70 Keep It Registered 71 Recognize Timing Critical Signals 71 Use Supported Design Flows 71 Make Only Al...

Страница 3: ...aining the Core 109 Simulation 111 Synthesis and Implementation 111 Chapter 8 Detailed Example Design Chapter 9 Test Bench Appendix A Verification and Interoperability Simulation 119 Hardware Testing...

Страница 4: ...XAUI v12 3 Product Guide www xilinx com 4 PG053 April 6 2016 Revision History 141 Please Read Important Legal Notices 142 Send Feedback...

Страница 5: ...8 State Machines Available under the Xilinx End User License Agreement IP Facts LogiCORE IP Facts Core Specifics Supported Device Family 1 1 For a complete list of supported devices see Vivado IP cata...

Страница 6: ...omponents in a 10 Gigabit Ethernet system distributed across a circuit board and to reduce the number of interface signals in comparison with the XGMII 10 Gigabit Ethernet Media Independent Interface...

Страница 7: ...Core with Client Side User Logic X13667 FPGA User Logic Transceiver Transceiver Transceiver Transceiver Clocks and Reset Logic Idle Generation Synchronization Deskew Management Synchronization Synchro...

Страница 8: ...e latest IP Update on the Xilinx IP Center For detailed information about the core see the XAUI product page Recommended Design Experience Although the XAUI core is a fully verified solution the chall...

Страница 9: ...ns of XAUI have extended beyond 10 Gigabit Ethernet to the backplane and other general high speed interconnect applications Figure 1 3 shows a typical backplane and other general high speed interconne...

Страница 10: ...r License Information about this and other Xilinx LogiCORE IP modules is available at the Xilinx Intellectual Property page For information about pricing and availability of other Xilinx LogiCORE IP m...

Страница 11: ...t the XAUI core submit a webcase from Xilinx Support web page Be sure to include the following information Product name Core version number Explanation of your comments Document For comments or sugges...

Страница 12: ...t transceiver user guide Transmit Path Latency As measured from the input port xgmii_txd 63 0 of the transmitter side XGMII until that data appears on the txdata pins on the internal transceiver inter...

Страница 13: ...erface Speed Grades The minimum device requirements for 10G and 20G operation are listed in the following table Resource Utilization UltraScale Architecture Devices Table 2 2 provides approximate reso...

Страница 14: ...ximate resource counts for the various core options on Artix 7 FPGAs Table 2 3 Device Utilization Virtex 7 FPGAs Shared Logic MDIO Management LUTs FFs In Example Design FALSE 1036 1193 In Example Desi...

Страница 15: ...regain of alignment Frame transmission Frame reception Clock compensation Recovery from error conditions Hardware Verification The core has been used in several hardware test platforms within Xilinx I...

Страница 16: ...rxd 63 0 OUT clk156_out Received data eight bytes wide xgmii_rxc 7 0 OUT clk156_out Receive control bits one bit per received data byte Table 2 7 Ports Corresponding to the I O of the Transceiver Sign...

Страница 17: ...Status Ports 7 Series FPGAs Signal Name Direction Clock Domain Description CHANNEL 0 GT0 DRP gt0_drpaddr 8 0 in dclk DRP address bus for channel 0 gt0_drpen in dclk DRP enable signal 0 No read or writ...

Страница 18: ...t Async GTXE2 and GTPE2 This active High PLL frequency lock signal indicates that the PLL frequency is within predetermined tolerance Signal Integrity and Functionality GT0 Eye scan gt0_eyescantrigger...

Страница 19: ...tter post cursor TX pre emphasis control gt0_txdiffctrl_in 3 0 in Async Driver Swing Control gt0_txinhibit_in in clk156_out When High this signal blocks the transmission of data GT0 PRBS gt0_rxprbscnt...

Страница 20: ...1 Write operation when drpen is 1 gt1_drp_busy out dclk GTPE2 all configurations or GTHE2 10G configuration Indicates the DRP interface is being used internally by the serial transceiver and should no...

Страница 21: ...he polarity of incoming data gt1_txpolarity_in in clk156_out The txpolarity port can invert the polarity of outgoing data GT1 RX Decision Feedback Equalizer DFE gt1_rxlpmen_in in Async GTXE2 and GTHE2...

Страница 22: ...ntains errors GT1 RX CDR gt1_rxcdrhold_in in Async Hold the CDR control loop frozen GT1 Digital Monitor gt1_dmonitorout_out 7 0 out Async GTXE2 Digital Monitor Output Bus gt1_dmonitorout_out 14 0 out...

Страница 23: ...A reset process gt2_rxpcsreset_in in Async Starts the RX PCS reset process gt2_rxpmaresetdone_out out Async GTHE2 and GTPE2 This active High signal indicates RX PMA reset is complete gt2_rxresetdone_o...

Страница 24: ...GTPE2 Determines whether the value of the high frequency boost is either held or adapted gt2_rxlpmhfovrden_in in Async GTPE2 Determines whether the high frequency boost is controlled by an attribute o...

Страница 25: ...alid character in the 8B 10B table gt2_rxcommadet_out out clk156_out This signal is asserted when the comma alignment block detects a comma CHANNEL 3 GT3 DRP gt3_drpaddr 8 0 in dclk DRP address bus fo...

Страница 26: ...alignment initialization done gt3_txdlysresetdone_out out Async TX delay alignment soft reset done gt3_cplllock_out out Async GTHE2 This active High PLL frequency lock signal indicates that the PLL fr...

Страница 27: ...t3_txpostcursor_in 4 0 in Async Transmitter post cursor TX post emphasis control gt3_txprecursor_in 4 0 in Async Transmitter post cursor TX pre emphasis control gt3_txdiffctrl_in 3 0 in Async Driver S...

Страница 28: ...0 No read or write operation performed 1 enables a read or write operation gt0_drpdi 15 0 in dclk Data bus for writing configuration data to the transceiver for channel 0 gt0_drpdo 15 0 out dclk Data...

Страница 29: ...DRP address bus for channel 3 gt3_drpen in dclk DRP enable signal 0 No read or write operation performed 1 enables a read or write operation gt3_drpdi 15 0 in dclk Data bus for writing configuration d...

Страница 30: ...e Signal Integrity and Functionality Eye Scan gt_eyescantrigger 3 0 in clk156_out Causes a trigger event gt_eyescanreset 3 0 in Async This port is driven High and then deasserted to start the EYESCAN...

Страница 31: ...sticky status output indicates that PRBS errors have occurred gt_rxprbssel 15 0 in clk156_out Receiver PRBS checker test pattern control gt_txprbssel 15 0 in clk156_out Transmitter PRBS generator tes...

Страница 32: ...k156_out MDIO 3 state 1 disconnects the output driver from the MDIO bus type_sel 1 0 in Tie off Type select prtad 4 0 in Tie off MDIO port address you should set this to provide a unique ID on the MDI...

Страница 33: ...12 5 MHz for 20G XAUI operation clk156_lock out This active High PLL frequency lock signal indicates that the PLL frequency is within predetermined tolerance The transceiver and its clock outputs are...

Страница 34: ...esses 1 and 3 in the MDIO register address map as shown in Table 2 14 Table 2 14 10GBASE X PCS PMA MDIO Registers Register Address Register Name 1 0 Physical Medium Attachment Physical Medium Dependen...

Страница 35: ...complete The soft_reset pin is connected to this bit This can be connected to the reset of any other MMDs R W Self clearing 0 1 0 14 Reserved The block always returns 0 for this bit and ignores writes...

Страница 36: ...serial transceivers back into the receiver R W 0 X Ref Target Figure 2 2 Figure 2 2 PMA PMD Status 1 Register Table 2 16 PMA PMD Status 1 Register Bit Definitions Bit Name Description Attributes Defa...

Страница 37: ...Speed Ability X Ref Target Figure 2 3 Figure 2 3 PMA PMD Device Identifier Registers Table 2 17 PMA PMD Device Identifier Registers Bit Definitions Bit Name Description Attributes Default Value 1 2 15...

Страница 38: ...G Capable The block always returns 1 for this bit and ignores writes R O 1 X Ref Target Figure 2 5 Figure 2 5 PMA PMD Devices in Package Registers Table 2 19 PMA PMD Devices in Package Registers Bit D...

Страница 39: ...O 0 1 5 1 PMA PMD Present The block always returns 1 for this bit R O 1 1 5 0 Clause 22 Device Present The block always returns 0 for this bit R O 0 X Ref Target Figure 2 6 Figure 2 6 10G PMA PMD Cont...

Страница 40: ...ns 0 for this bit R O 0 1 8 10 Receive Fault The block always returns 0 for this bit R O 0 1 8 9 Reserved The block always returns 0 for this bit R O 0 1 8 8 PMD Transmit Disable Ability The block alw...

Страница 41: ...ions Bit Name Description Attributes Default Value 1 10 15 5 Reserved The block always returns 0s for these bits R O All 0s 1 10 4 PMD Receive Signal OK 3 1 Signal OK on receive Lane 3 0 Signal not OK...

Страница 42: ...obal PMD Receive Signal OK 1 Signal OK on all receive lanes 0 Signal not OK on all receive lanes R O X Ref Target Figure 2 9 Figure 2 9 PMA PMD Package Identifier Registers Table 2 23 PMA PMD Package...

Страница 43: ...s writes R O 0 3 0 13 Speed Selection The block always returns 1 for this bit and ignores writes R O 1 3 0 12 Reserved The block always returns 0 for this bit and ignores writes R O 0 3 0 11 Power dow...

Страница 44: ...al fault detected 0 No local fault detected This bit is set to 1 whenever either of the bits 3 8 11 3 8 10 are set to 1 R O 3 1 6 3 Reserved The block always returns 0s for these bits and ignores writ...

Страница 45: ...Speed Ability X Ref Target Figure 2 12 Figure 2 12 PCS Device Identifier Registers Table 2 26 PCS Device Identifier Registers Bit Definition Bit Name Description Attributes Default Value 3 2 15 0 PCS...

Страница 46: ...es writes R O All 0s 3 4 0 10G Capable The block always returns 1 for this bit and ignores writes R O 1 X Ref Target Figure 2 14 Figure 2 14 PCS Devices in Package Registers Table 2 28 PCS Devices in...

Страница 47: ...WIS Present The block always returns 0 for this bit R O 0 3 5 1 PMA PMD Present The block always returns 1 for this bit R O 1 3 5 0 Clause 22 device present The block always returns 0 for this bit R O...

Страница 48: ...fault 1 Fault condition on transmit path 0 No fault condition on transmit path R O Latching High Self clears after a read unless the fault is still present 3 8 10 Receive local fault 1 Fault condition...

Страница 49: ...re 2 17 Figure 2 17 Package Identifier Registers Table 2 31 PCS Package Identifier Register Bit Definitions Bit Name Description Attributes Default Value 3 14 15 0 Package Identifier The block always...

Страница 50: ...10GBASE X receive lanes aligned 0 10GBASE X receive lanes not aligned RO 3 24 11 Pattern Testing Ability The block always returns 1 for this bit R O 1 3 24 10 4 Reserved The block always returns 0 fo...

Страница 51: ...ister Bit Definitions Bit Name Description Attributes Default Value 3 25 15 3 Reserved The block always returns 0 for these bits R O All 0s 3 25 2 Transmit Test Pattern Enable 1 Transmit test pattern...

Страница 52: ...4 DTE XS MDIO Registers Register Address Register Name 5 0 DTE XS Control 1 5 1 DTE XS Status 1 5 2 5 3 DTE XS Device Identifier 5 4 DTE XS Speed Ability 5 5 5 6 DTE XS Devices in Package 5 7 Reserved...

Страница 53: ...peed Selection The block always returns 1 for this bit and ignores writes R O 1 5 0 12 Reserved The block always returns 0 for this bit and ignores writes R O 0 5 0 11 Power down 1 Power down mode 0 N...

Страница 54: ...ault detected This bit is set to 1 whenever either of the bits 5 8 11 5 8 10 are set to 1 R O 5 1 6 3 Reserved The block always returns 0s for these bits and ignores writes R O All 0s 5 1 2 DTE XS Rec...

Страница 55: ...tributes Default Value 5 2 15 0 DTE XS Identifier The block always returns 0 for these bits and ignores writes R O All 0s 5 3 15 0 DTE XS Identifier The block always returns 0 for these bits and ignor...

Страница 56: ...esent The block always returns 0 for this bit R O 0 5 6 13 0 Reserved The block always returns 0 for these bits R O All 0s 5 6 15 6 Reserved The block always returns 0 for these bits R O All 0s 5 5 5...

Страница 57: ...ent The block always returns 10 R O 10 5 8 13 12 Reserved The block always returns 0 for these bits R O All 0s 5 8 11 Transmit Local Fault 1 Fault condition on transmit path 0 No fault condition on tr...

Страница 58: ...available High frequency test pattern of 1010101010 at each device specific transceiver output Low frequency test pattern of 111110000011111000001111100000 at each device specific transceiver output m...

Страница 59: ...ns Bit Name Description Attributes Default Value 5 24 15 13 Reserved The block always returns 0 for these bits R O All 0s 5 24 12 DTE XGXS Lane Alignment Status 1 DTE XGXS receive lanes aligned 0 DTE...

Страница 60: ...t Control Register RSVD TEST PATTERN ENABLE TEST PATTERN SELECT 15 3 2 1 0 Reg 5 25 X13718 Table 2 43 10G DTE XGXS Test Control Register Bit Definitions Bit Name Description Attributes Default Value 5...

Страница 61: ...Table 2 44 PHY XS MDIO Registers Register Address Register Name 4 0 PHY XS Control 1 4 1 PHY XS Status 1 4 2 4 3 Device Identifier 4 4 PHY XS Speed Ability 4 5 4 6 Devices in Package 4 7 Reserved 4 8...

Страница 62: ...peed Selection The block always returns 1 for this bit and ignores writes R O 1 4 0 12 Reserved The block always returns 0 for this bit and ignores writes R O 0 4 0 11 Power down 1 Power down mode 0 N...

Страница 63: ...ault detected This bit is set to 1 whenever either of the bits 4 8 11 4 8 10 are set to 1 R O 4 1 6 3 Reserved The block always returns 0s for these bits and ignores writes R O All 0s 4 1 2 PHY XS Rec...

Страница 64: ...Attributes Default Value 4 2 15 0 PHY XS Identifier The block always returns 0 for these bits and ignores writes R O All 0s 4 3 15 0 PHY XS Identifier The block always returns 0 for these bits and ig...

Страница 65: ...Bit Definitions Bit Name Description Attributes Default Value 4 6 15 Vendor specific Device 2 present The block always returns 0 for this bit R O 0 4 6 14 Vendor specific Device 1 present The block al...

Страница 66: ...Definitions Bit Name Description Attributes Default Value 4 8 15 14 Device Present The block always returns 10 R O 10 4 8 13 12 Reserved The block always returns 0 for these bits R O All 0s 4 8 11 Tr...

Страница 67: ...5 Figure 2 35 PHY XS Package Identifier Registers PACKAGE IDENTIFIER 15 0 Reg 4 15 PACKAGE IDENTIFIER 15 0 Reg 4 14 X13707 Table 2 51 Package Identifier Registers Bit Definitions Bit Name Description...

Страница 68: ...es not aligned RO 4 24 11 PatternTesting Ability The block always returns 1 for this bit R O 1 4 24 10 4 Reserved The block always returns 0 for these bits R O All 0s 4 24 3 Lane 3 Sync 1 Lane 3 is sy...

Страница 69: ...nsmit test pattern enable 0 Transmit test pattern disabled R W 0 4 25 1 0 Test Pattern Select 11 Reserved 10 Mixed frequency test pattern 01 Low frequency test pattern 00 High frequency test pattern R...

Страница 70: ...arting Point Each instance of the XAUI core is delivered with an example design that can be implemented in an FPGA and simulated This design can be used as a starting point for your own design or can...

Страница 71: ...constraint file provided with the example design for the core identifies the critical signals and the timing constraints that should be applied See Chapter 8 Constraining the Core for further informa...

Страница 72: ...nsmission Special code groups are used to allow each lane to synchronize at a word boundary and to deskew all four lanes into alignment at the receiving end The XAUI standard is fully specified in cla...

Страница 73: ...applications A typical backplane application is shown in Figure 4 2 X Ref Target Figure 4 1 Figure 4 1 Connecting XAUI to an Optical Module X Ref Target Figure 4 2 Figure 4 2 Typical Backplane Applica...

Страница 74: ...mit idle generation logic Creates the code groups to allow synchronization and alignment at the receiver Synchronization state machine one per lane Identifies byte boundaries in incoming serial data D...

Страница 75: ...AUI Core with Client Side User Logic X13667 FPGA User Logic Transceiver Transceiver Transceiver Transceiver Clocks and Reset Logic Idle Generation Synchronization Deskew Management Synchronization Syn...

Страница 76: ...ide on a single rising clock edge This demultiplexing is done by extending the bus upwards so that there are now eight lanes of data numbered 0 7 the lanes are organized such that data appearing on la...

Страница 77: ...rror and others These control characters all have in common that the control line for that lane is 1 for the character and a certain data byte value The relevant characters are defined in the IEEE Std...

Страница 78: ...ame can be marked by the occurrence of a Start character in lane 0 with the data characters in lanes 1 to 7 When the frame is complete it is completed by a Terminate character the T in lane 1 of Figur...

Страница 79: ...e letter E with the relevant control bits set X Ref Target Figure 5 2 Figure 5 2 Frame Transmission with Error Across Internal 64 bit Client Side I F xgmii_txd 7 0 xgmii_txd 15 8 xgmii_txd 23 16 xgmii...

Страница 80: ...either lane 0 or in lane 4 The Terminate character T can occur in any lane Figure 5 4 shows an inbound frame of data propagating an error In this instance the error is propagated in lanes 4 to 7 shown...

Страница 81: ...with Error Across the Internal 64 bit Client Interface clk156 xgmii_rxd 7 0 xgmii_rxd 15 8 xgmii_rxd 23 16 xgmii_rxd 31 24 xgmii_rxd 39 32 xgmii_rxd 47 40 xgmii_rxd 55 48 xgmii_rxd 63 56 xgmii_rxc 7 0...

Страница 82: ...hronization status These ports are described in Debug Port MDIO Interface The Management Data Input Output MDIO interface is a simple low speed two wire interface for management of the XAUI core consi...

Страница 83: ...e 5 6 illustrates the use of a Virtex 7 FPGA SelectIO interface 3 state buffer as the bus interface Table 5 3 MDIO Management Interface Port Description Signal Name Direction Description mdc IN Manage...

Страница 84: ...the PRTAD field set to a value other than that on its prtad 4 0 port MDIO Transactions The MDIO interface should be driven from a STA master according to the protocol defined in IEEE Std 802 3 2012 An...

Страница 85: ...takes the 16 bit word in the data field and writes it to the register at the current address X Ref Target Figure 5 7 Figure 5 7 MDIO Set Address Transaction Z 1 1 1 0 0 0 P4 P3 P2 P1 P0 V4 V3 V2 V1 V...

Страница 86: ...ess This allows sequential reading or writing by a STA master of a block of register addresses X Ref Target Figure 5 9 Figure 5 9 MDIO Read Transaction Z 1 1 1 0 1 1 P4 P3 P2 P1 P0 V4 V3 V2 V1 V0 Z 0...

Страница 87: ...cific transceivers See bit 5 0 14 in Table 2 35 1 Power Down Sets the device specific transceivers into power down mode See bit 5 0 11 in Table 2 35 2 Reset Local Fault Clears both TX Local Fault and...

Страница 88: ...otherwise 0 see bit 5 8 10 in Table 2 40 Latches High Cleared by rising edge on configuration_vector 2 5 2 Synchronization Each bit is 1 if the corresponding XAUI lane is synchronized on receive othe...

Страница 89: ...orts signaling the alignment and synchronization status of the receiver Table 5 7 Table 5 7 Debug Port Port Name Description debug 5 align_status 1 when the XAUI receiver is aligned across all four la...

Страница 90: ...rence clock in the example design as it was in previous versions or inside the core simplifying the design This new level of hierarchy receives the name of component_name _support Figure 6 1 and Figur...

Страница 91: ...reset initialization circuitry The dclk clock must not be derived from any transceiver output clocks The frequency of dclk must be entered into the core GUI prior to core generation this frequency in...

Страница 92: ...ple design or alternatively inside the core See Figure 6 3 and Figure 6 4 respectively for the shared logic to be included in the example design or in the core X Ref Target Figure 6 3 Figure 6 3 Clock...

Страница 93: ...Guide UG576 Ref 3 UltraScale Device GTY Transceivers A single IBUFDS_GTE3 module is used to feed the reference clock to the GTYE3_COMMON transceiver The IBUFDS_GTE3 is included in the Shared Logic lev...

Страница 94: ...Scheme for Internal Client Side Interface UltraScale Architecture GTY Transceiver Shared Logic in Example Design Shareable logic 7 B 20021 75 43 287 43 2875 7 B 11 43 5 43 7 865 7 865 5 865 5 865 7 2...

Страница 95: ...er logic of a different XAUI core due to problems of phase alignment For more information about UltraScale device transceiver clock distribution see the UltraScale Architecture GTY Transceivers User G...

Страница 96: ...requency is flexible the example design uses a 50 MHz clock Choosing a different frequency can allow for the sharing of DRPCLK across all transceivers in a device The dclk clock provided to the core m...

Страница 97: ...or alternatively inside the core See Figure 6 7 and Figure 6 8 respectively for the shared logic to be included in the example design or in the core X Ref Target Figure 6 7 Figure 6 7 Clock Scheme fo...

Страница 98: ...ifferent XAUI core due to problems of phase alignment For more information about 7 series FPGA transceiver clock distribution see the section on Clocking in the 7 Series FPGAs GTX GTH Transceiver User...

Страница 99: ...he core See Figure 6 9 and Figure 6 10 respectively for the shared logic to be included in the example design or in the core X Ref Target Figure 6 9 Figure 6 9 Clock Scheme for Internal Client Side In...

Страница 100: ...lems of phase alignment For more information about 7 series FPGA transceiver clock distribution see the section on Clocking in the 7 Series FPGAs GTX GTH Transceiver User Guide UG476 Ref 1 X Ref Targe...

Страница 101: ...igure 6 12 respectively for the shared logic to be included in the example design or in the core X Ref Target Figure 6 11 Figure 6 11 Clock Scheme for Internal Client Side Interface 7 Series FPGA GTP...

Страница 102: ...ment For more information about 7 series FPGA transceiver clock distribution see the section on clocking in the 7 Series FPGAs GTP Transceiver User Guide UG482 Ref 2 X Ref Target Figure 6 12 Figure 6...

Страница 103: ...clock can be shared from a neighboring quad Logic clocks cannot be shared between core instances with the supplied design The usrclks on each core and quad of transceivers are sourced from the TXOUTCL...

Страница 104: ...es Full details on that maximum amount of transmit skew can be found by looking at TLLSKEW in the appropriate device data sheet Under some circumstances it is possible that TLLSKEW can exceed the PMA...

Страница 105: ...ng with IP UG896 Ref 5 Vivado Design Suite User Guide Getting Started UG910 Ref 6 Vivado Design Suite User Guide Logic Simulation UG900 Ref 7 Customizing and Generating the Core You can customize the...

Страница 106: ...20G XAUI Data Rates Transceiver Type This option is only available for Virtex UltraScale devices that contain both GTHE3 and GTYE3 transceivers please select the transceiver type for these devices XAU...

Страница 107: ...le devices DRP Clock Frequency MHz Enter the frequency of the DRP clock the dclk input of the core For UltraScale 7 Series and Zync 7000 devices this value is used to set the target frequency for Out...

Страница 108: ...Target Figure 7 2 Figure 7 2 Shared Logic Tab Table 7 1 GUI Parameter to User Parameter Relationship GUI Parameter Value 1 User Parameter Value 1 Default Value MDIO Management Mdio_Management true Dat...

Страница 109: ...onstraints such as DCLK frequency and Transceiver location should be applied in the user XDC Clock Frequencies A constraint specifying the frequency of the clock 156 25 MHz for 10G or 312 5 MHz for 20...

Страница 110: ...Customization GUI before generating the core For GTYE3 transceivers replace the GTHE3 string with GTYE3 and the gthe3 string with gtye3 in the following example syntax set_property LOC GTHE3_CHANNEL_X...

Страница 111: ...C GTHE3_CHANNEL_X0Y2 get_cells xaui_i inst xaui_block_i CompName _gt_i gen_gtwizard_gthe3_top CompName _gt_gtwizard_gthe3_inst gen_gtwizard_gthe3 gen_channel_container gen_enabled_channel gthe3_channe...

Страница 112: ...2 PG053 April 6 2016 Chapter 7 Design Flow Steps All synthesis sources are included that are required by the core For the XAUI core this is a mix of both encrypted and unencrypted source Only the unen...

Страница 113: ...ample Design 7 Series FPGAs X13673 component_name_gt_wrapper vhd v Transceiver component_name_gt_wrapper_gt vhd v Transceiver component_name_gt_wrapper_gt vhd v Transceiver component_name_gt_wrapper_g...

Страница 114: ...ic in Core 7 Series FPGAs X13672 component_name_gt_wrapper vhd v Transceiver component_name_gt_wrapper_gt vhd v Transceiver component_name_gt_wrapper_gt vhd v Transceiver component_name_gt_wrapper_gt...

Страница 115: ...d Logic in the Example Design UltraScale Architecture component_name_gt UltraScale wizard subcore XAUI Encrypted HDL Clock Logic component_name_clk_clocking vhd v Reset Logic component_name_clk_resets...

Страница 116: ...be placed directly on a board and does not constrain the I O pins The example design can be opened in a separate project by generating the Examples output product then right clicking the core instanc...

Страница 117: ...determine when the core is initialized and ready for use and then sends some simple frames in both Tx and Rx directions The test bench is supplied as part of the Example Simulation output product grou...

Страница 118: ...O monitor to check when the core is ready to send receive frames The demonstration test bench performs the following tasks Clocks are generated An initial reset is applied The MDIO interface is addres...

Страница 119: ...e transmission Frame reception Clock compensation Recovery from error conditions Hardware Testing The core has been used in several hardware test platforms within Xilinx In particular the core has bee...

Страница 120: ...egated into a single port For example gt0_gtrxreset and gt1_gtrxreset now become gt_gtrxreset 1 0 This is true for all ports with the exception of the DRP buses which follow the convention of gt n _dr...

Страница 121: ...ug port The ports related to the drp interface drp_addr drp_en drp_i drp_o drp_rdy drp_we are now split into four sets one for each transceiver and are only available when the Transceiver Control and...

Страница 122: ...interface moved to Transceiver Control and Status Ports Use gt0_drpi gt1_drpi gt2_drpi gt3_drpi drp_o 63 0 OUT DRP interface moved to Transceiver Control and Status Ports Use gt0_drpo gt1_drpo gt2_drp...

Страница 123: ...and Status Ports GTX and GTH transceivers only Assign default value 0 gtN_rxdfelpmreset_in IN Added Transceiver Control and Status Ports GTX and GTH transceivers only Assign default value 0 gtN_rxmon...

Страница 124: ...n Table B 3 Ports Added when the Transceiver Control and Status Ports Option is Enabled N is the number of the channel Cont d Port Direction Reason for Change Proposed Solution Table B 4 Ports Added F...

Страница 125: ...ol and Status Ports Assign default value open gtN_rxcommadet_out out Added Transceiver Control and Status Ports Assign default value open Table B 4 Ports Added From v12 0 to v12 1 Cont d Port Directio...

Страница 126: ...inx Support web page contains key resources such as product documentation release notes answer records and links for obtaining further product support Documentation This product guide is the main docu...

Страница 127: ...mes error messages or a generic summary of the issue encountered To see all answer records directly related to the XAUI core search for the phrase XAUI Master Answer Record for the XAUI core AR 54666...

Страница 128: ...ignals can then be analyzed This feature in the Vivado IDE is used for logic debugging and validation of a design running in Xilinx The Vivado logic analyzer is used to interact with the logic debug L...

Страница 129: ...cific open a case with Xilinx Technical Support and include a wlf file dump of the simulation For the best results dump the entire design hierarchy If using VHDL do you have a mixed mode simulation li...

Страница 130: ...mulation To discuss possible solutions use the Xilinx User Community forums xilinx com xlnx Hardware Debug Hardware issues can range from link bring up to problems seen after hours of testing This sec...

Страница 131: ...nterface is encoded to be a randomized sequence of K Sync R Skip A Align codes on the XAUI interface For more information on this encoding see the IEEE 802 3 2012 specification section 48 2 4 2 for mo...

Страница 132: ...ault below Check that the core is correctly configured using either the configuration vector or the MDIO interface Monitor XGMII data and data on Rocket IO interface Are errors being inserted by the X...

Страница 133: ...he receiver is being reset At least one of the lanes is not synchronized debug 4 1 The lanes are not properly aligned debug 5 Note The debug 5 0 signal is not latching A TX local fault is indicated in...

Страница 134: ...silently drop any data being transmitted and instead transmit a remote fault RX Link Status 0 link down in Device A X Ref Target Figure C 3 Stage 2 Device B Powers Up and Resets Device B powers up an...

Страница 135: ...in Figure C 6 Device A and Device B have both powered up and been reset The link status is 1 link up in both A and B and in both the MAC can transmit frames successfully X Ref Target Figure C 6 Figur...

Страница 136: ...rs are seen or if an A code is not seen in all four lanes at the same time See the following section Problems with a High Bit Error Rate Transceiver Specific Ensure that the polarities of the txn txp...

Страница 137: ...e does not meet the specification Problems with a High Bit Error Rate Symptoms If the link comes up but then goes down again or never comes up following a reset the most likely cause for a RX Local Fa...

Страница 138: ...ect operation in the transceiver parallel loopback but not in serial loopback this might indicate a transceiver issue A mild form of bit error rate might be solved by adjusting the transmitter Pre Emp...

Страница 139: ...rt assist with the issue To create a technical support case in Webcase see the Xilinx website at www xilinx com support clearexpress websupport htm Items to include when opening a case Detailed descri...

Страница 140: ...r User Guide UG482 3 UltraScale Architecture GTH Transceivers User Guide UG576 4 Ultrascale Architecture GTY Transceivers User Guide UG578 5 Vivado Design Suite User Guide Designing with IP UG896 6 Vi...

Страница 141: ...Hampshire Interoperability Lab is an excellent source of information on 10 Gigabit Ethernet technology www iol unh edu consortiums 10gec index html Revision History The following table shows the revis...

Страница 142: ...to be fail safe or for use in any application requiring fail safe performance you assume sole risk and liability for use of Xilinx products in such critical applications please refer to Xilinx s Term...

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