Status Control and Transceiver Ports - 12.0 English

PG074 Aurora 64B/66B LogiCORE IP Product Guide

Document ID
PG074
Release Date
2022-10-19
Version
12.0 English

Table: Transceiver Control and Status Interface Ports describes the function of the Aurora 64B/66B core status and control ports allowing user applications to monitor the Aurora 64B/66B channel and access built-in features of the serial transceiver interface. The DRP interface allows reading and updating of the serial transceiver parameters and settings through the AXI4-Lite protocol-compliant or native dynamic reconfiguration port (DRP) interfaces.

Table 2-12: Transceiver Control and Status Interface Ports

Name

Direction

Clock Domain

Description

reset_pb/
tx_reset_pb/
rx_reset_pb

Input

async

Push Button Reset. The top-level reset input at the example design level. Required to drive the Support Reset logic inside the core.

reset_pb is available in Duplex, TX-only_simplex and RX-only_simplex modes .

tx_reset_pb is available in TX/RX_simplex mode .

rx_reset_pb is available in TX/RX_simplex mode .

gt_reset_out

Output

init_clk

Output of de-bouncer for gt_reset. Enabled when Include Shared Logic in Core is selected.

sys_reset_out/

tx_sys_reset_out/

rx_sys_reset_out

Output

user_clk

System reset output to be used by the example design level logic.

sys_reset_out is available in Duplex, TX-only_simplex and RX-only_simplex modes.

tx_sys_reset_out is available in TX/RX_simplex mode.

rx_sys_reset_out is available in TX/RX_simplex mode.

reset2fg

Output

user_clk

This port is used to reset the Frame generator in the example design only. This port is available in the TX-only_Simplex and TX/RX_Simplex configurations only .

reset2fc

Output

user_clk

This port is used to reset the Frame checker in the example design only. This port is available in the RX-only_Simplex and TX/RX_Simplex configurations only .

link_reset_out

Output

init_clk

Driven High if hot-plug count expires.

pma_init

Input

async

The transceiver pma_init reset signal is connected to the top level through a debouncer. Systematically resets all Physical Coding Sublayer (PCS) and Physical Medium Attachment (PMA) subcomponents of the transceiver. The signal is debounced using init_clk_in for at least six init_clk cycles. See the Reset section in the related transceiver user guide for more details.

GT_SERIAL_RX

rxp[0: m –1] (1)

Input

RX serial clk

Positive differential serial data input pin.

This input is not available in the TX-only_simplex configuration.

rxn[0: m –1] (1)

Input

RX serial clk

Negative differential serial data input pin.

This input is not available in the TX-only_simplex configuration.

GT_SERIAL_TX

txp[0: m –1] (1)

Output

TX
serial clk

Positive differential serial data output pin.

This output is not available in the RX-only_simplex configuration.

txn[0: m –1] (1)

Output

TX
serial clk

Negative differential serial data output pin.

This output is not available in the RX-only_simplex configuration.

CORE_STATUS

channel_up/
tx_channel_up/
rx_channel_up

Output

user_clk

Asserted when the Aurora 64B/66B channel initialization is complete and the channel is ready to send/receive data.

channel_up is available in duplex mode.

tx_channel_up is available in TX-only_simplex and TX/RX_simplex mode.

rx_channel_up is available in RX-only_simplex and TX/RX_simplex mode.

lane_up[0: m –1]/
tx_lane_up[0: m –1]/
rx_lane_up[0: m –1] (1)

Output

user_clk

Asserted for each lane upon successful lane initialization with each bit representing one lane. The Aurora 64B/66B core can only receive data after all lane_up signals are asserted.

lane_up is available in duplex mode.

tx_lane_up is available in TX-only_simplex and TX/RX_simplex mode.

rx_lane_up is available in RX-only_simplex and TX/RX_simplex mode.

soft_err/
tx_soft_err/
rx_soft_err

Output

user_clk

Indicates that a soft error is detected in the incoming serial stream (asserted for a single user_clk period).

soft_err is available in duplex mode.

tx_soft_err is available in TX-only_simplex and TX/RX_simplex mode.

rx_soft_err is available in RX-only_simplex and TX/RX_simplex mode.

hard_err/
tx_hard_err/
rx_hard_err

Output

user_clk

Hard error detected (asserted until the core resets).

hard_err is available in duplex mode.

tx_hard_err is available in TX-only_simplex and TX/RX_simplex mode.

rx_hard_err is available in RX-only_simplex and TX/RX_simplex mode.

gt_to_common_qpllreset_out

Output

async

Quad phase-locked loop (QPLL) common reset output used by the slave partner shared logic.

gt_pll_lock

Output

init_clk

Asserted when tx_out_clk is stable. When deasserted (Low), circuits using tx_out_clk should be held in reset.

CORE_CONTROL

loopback[2:0]

Input

async

See the 7 Series FPGAs GTX/GTH Transceivers User Guide (UG476) [Ref 7] or UltraScale Architecture GTH Transceivers User Guide (UG576) [Ref 5] or UltraScale Architecture GTY Transceivers User Guide (UG578) [Ref 6] for details about loopback.

gt_rxcdrovrden_in

Input

async

See the 7 Series FPGAs GTX/GTH Transceivers User Guide (UG476) [Ref 7] or UltraScale Architecture GTH Transceivers User Guide (UG576) [Ref 5] or UltraScale Architecture GTY Transceivers User Guide (UG578) [Ref 6] when applicable for details about gt_rxcdrovrden_in

power_down

Input

init_clk

Drives the Aurora 64B/66B core to reset.

QPLL_CONTROL_IN

gt_qplllock_quad< quad_no >_in, gt_qpllrefclklost_quad< quad_no >_
in (3)

Input

init_clk

QPLL lock and reference clock lost signal slave partner inputs. Should be connected to the master partner shared logic output ports gt_qplllock_quad< quad_no >_out and gt_qpllrefclklost_quad< quad_no >_out respectively.

QPLL_CONTROL_OUT

gt_qplllock_quad< quad_no >_out, gt_qpllrefclklost_quad< quad_no >_
out (3)

Output

init_clk

QPLL lock and reference clock lost signal master partner shared logic outputs.

CHANNEL_DRP_IF (6) (17) (18)

drp_clk_in

Input

-

A user-configurable parameter only applicable to 7 series FPGA designs. The default value is 100 MHz. The drp_clk frequency can be set from 50 MHz to x MHz where x is device and speed grade dependent. In UltraScale devices, init_clk is connected to the DRPCLK port of the GTHE3_, GTHE4_, GTYE3_, GTYE4_CHANNEL DRP interfaces and in the axi_to_drp sub module.

drpaddr_in/
gt< lane >_drpaddr (14) (8)

Input

drp_clk_in

DRP address bus. The drpaddress bus is available on a per lane basis.

drpdi_in/
gt< lane >_drpdi (14) (8)

Input

drp_clk_in

Data bus for reading configuration data from the transceiver to the FPGA logic resources.The DRP data input bus is available on a per lane basis.

drpen_in_lane_< lane >/
gt< lane >_drpen (14) (8)

Input

drp_clk_in

DRP enable signal.

0 : No read or write operation performed.

1 : Enables a read or write operation.

For write operations, drpwe and drpen should be driven High concurrently for one drp_clk_in cycle only.

For read operations, drpen should be driven High for one drp_clk_in cycle.

The DRP enable is available on a per lane basis.

drpwe_in_lane_< lane >/
gt< lane >_drpwe (8) (14)

Input

drp_clk_in

DRP write enable.

0 : Read operation when drpen is 1.

1 : Write operation when drpen is 1.

For write operations, drpwe and drpen should be driven High for one drpclk cycle only. The DRP write enable is available on a per lane basis.

drpdo_out_lane_< lane >/
gt< lane >_drpdo (8) (14)

Output

drp_clk_in

Data bus for reading configuration data from the GTX, GTH or GTY transceiver to the FPGA logic resources. The DRP data out bus is available on a per lane basis.

drprdy_out_lane_< lane >/
gt< lane >_drprdy (8) (14)

Output

drp_clk_in

Indicates that the write operation is complete and read data is valid. The drprdy signal is available on a per lane basis.

AXILITE_DRP_IF (6)

s_axi_awaddr_lane_< lane_no > (2) (9)

Input

drp_clk_in

AXI4-Lite Write address for DRP.

s_axi_awvalid_lane_< lane_no > (2) (9)

Input

drp_clk_in

Write address valid.

s_axi_awready_lane_< lane_no > (2) (9)

Output

drp_clk_in

Write address ready.

s_axi_araddr_lane_< lane_no > (2) (9)

Input

drp_clk_in

AXI4-Lite Read address for DRP.

s_axi_arvalid_lane_< lane_no > (2) (9)

Input

drp_clk_in

Read address valid.

s_axi_arready_lane_< lane_no > (2) (9)

Output

drp_clk_in

Read address ready.

s_axi_wdata_lane_< lane_no > (2) (9)

Input

drp_clk_in

Write data for DRP.

s_axi_wvalid_lane_< lane_no > (2) (9)

Input

drp_clk_in

Write data valid.

s_axi_wready_lane_< lane_no > (2) (9)

Output

drp_clk_in

Write data ready.

s_axi_wstrb_lane_< lane_no > (2) (9)

Input

drp_clk_in

Write data strobe.

s_axi_bvalid_lane_< lane_no > (2) (9)

Output

drp_clk_in

Write response valid.

s_axi_bresp_lane_< lane_no > (2) (9)

Output

drp_clk_in

Write response.

s_axi_rdata_lane_< lane_no > (2) (9)

Output

drp_clk_in

Read data.

s_axi_rvalid_lane_< lane_no > (2) (9)

Output

drp_clk_in

Read data valid.

s_axi_rresp_lane_< lane_no > (2) (9)

Output

drp_clk_in

Read response.

s_axi_rready_lane_< lane_no > (2) (9)

Output

drp_clk_in

Read data ready.

s_axi_bready_lane_< lane_no > (2) (9)

Input

drp_clk_in

Write data ready.

TRANSCEIVER_DEBUG (11)

gt< lane >_cplllock_out/
gt_cplllock (4) (5) (10) (14)

Output

init_clk

Active-High PLL frequency lock signal indicating that PLL frequency is within the predetermined tolerance. The transceiver and its clock outputs are not reliable until this condition is met.

gt< lane >_dmonitorout_out[ j :0]/
gt_dmonitorout (4) (5) (10) (12) (14)

Output

async

Digital Monitor Output Bus.

j = 7 for GTHE2 transceivers.

j = 14 for GTHE2 transceivers.

j= 17 for US GTH and GTY transceivers

j=16 for US+ GTH and GTY transceivers

gt< lane >_eyescandataerror_out/
gt_eyescandataerror (4) (5) (10) (12) (14)

Output

async

Asserted High for one rec_clk cycle when an (unmasked) error occurs while in the COUNT or ARMED state.

gt< lane >_eyescanreset_in/
gt_eyescanreset (4) (5) (10) (12) (14)

Input

async

Driven High, then deasserted to start the EYESCAN reset process.

gt< lane >_eyescantrigger_in/
gt_eyescantrigger (4) (5) (10) (12) (14)

Input

user_clk

Causes a trigger event.

gt_pcsrsvdin (4) (10) (11) (13) (14)

Input

async

PCSRSVDIN[2] is the DRP reset pin. For read-only registers, if a DRPRDY is not seen within 500 DRPCLK cycles after initiating a DRP transaction, reset the DRP interface using the port PCSRSVDIN[2]. This is available only in UltraScale device-based designs

gt< lane >_rxbufreset_in/
gt_rxbufreset (4) (5) (10) (12) (14)

Input

async

Driven High, then deasserted to start the RX elastic buffer reset process. In either single or sequential mode, activating rxbufreset resets the RX elastic buffer only.

gt< lane >_rxbufstatus_out/
gt_rxbufstatus (4) (5) (10) (12) (14)

Output

rxoutclk

RX buffer status.

000b : Nominal condition.

001b : Number of bytes in the buffer are less than CLK_COR_MIN_LAT.

010b : Number of bytes in the buffer are greater than CLK_COR_MAX_LAT.

101b : RX elastic buffer underflow.

110b : RX elastic buffer overflow.

gt< lane >_rxcdrhold_in/
gt_rxcdrhold (4) (5) (10) (12) (14)

Input

async

Holds the clock data recovery (CDR) control loop frozen.

gt< lane >_rxdfeagchold_
in (5) (10) (12) (13) (14)

Input

rxoutclk

HOLD RX DFE (Decision Feedback Equalizer)

2'b00 : Automatic gain control (AGC) loop adapt.

2'b10 : Freeze current AGC adapt value.

2'bx1 : Override AGC value according to the attribute. RX_DFE_GAIN_CFG

gt< lane >_rxdfeagcovrden_
in (5) (10) (12) (13) (14)

Input

rxoutclk

OVRDEN RX DFE

2'b00 : Automatic gain control (AGC) loop adapt.

2'b10 : Freeze current AGC adapt value.

2'bx1 : Override AGC value according to attribute.

RX_DFE_GAIN_CFG

gt< lane >_rxdfelfhold_
in (5) (10) (12) (13) (14)

Input

rxoutclk

When set to 1'b1 , the current low-frequency boost value is held. When set to 1'b0 , the low-frequency boost is adapted.

gt< lane >_rxdfelpmreset_in/
gt_rxdfelpmreset (4) (5) (10) (12) (14)

Input

async

Driven High, then deasserted to start the DFE reset process.

gt< lane >_rxlpmen_in/
gt_rxplmen (4) (5) (10) (12) (14)

Input

async

RX datapath

0 : DFE

1 : LPM (Low Power Mode)

gt< lane >_rxlpmhfovrden_
in (5) (10) (12) (13) (14)

Input

rxoutclk

OVRDEN RX LPM

2'b00 : KH high frequency loop adapt value.

2'b10 : Freeze current adapt value.

2'bx1 : Override KH value according to the RXLPM_HF_CFG attribute.

gt< lane >_rxlpmlfklovrden_
in (5) (10) (12) (13) (14)

Input

rxoutclk

OVRDEN RX LPM

2'b00 : KL low frequency loop adapt value.

2'b10 : Freeze current adapt value.

2'bx1 : Override KL value according to the RXLPM_LF_CFG attribute.

gt< lane >_rxmonitorout_
out (5) (10) (12) (13) (14)

Output

async

GTX transceiver:

RXDFEVP[6:0] = RXMONITOROUT[6:0]

RXDFEUT[6:0] = RXMONITOROUT[6:0]

RXDFEAGC[4:0] = RXMONITOROUT[4:0]

GTH transceiver:

RXDFEVP[6:0] = RXMONITOROUT[6:0]

RXDFEUT[6:0] = RXMONITOROUT[6:0]

RXDFEAGC[3:0] = RXMONITOROUT[4:1]

gt< lane >_rxmonitorsel_
in (5) (10) (12) (13) (14)

Input

async

Select signal for rxmonitorout[6:0]

2'b00 : Reserved.

2'b01 : Select AGC loop.

2'b10 : Select UT loop.

2'b11 : Select VP loop.

gt< lane >_rxpcsreset_in/
gt_rxpcsreset (4) (5) (10) (12) (14)

Input

async

Driven High, then deasserted to start the RX PMA reset process. The rxpcsreset signal does not start the reset process until rxuserrdy is High.

gt< lane >_rxpmareset_in/
gt_rxpmareset (4) (5) (10) (12) (14)

Input

async

Driven High, then deasserted to start the RX PMA reset process.

gt< lane >_rxpmaresetdone_out/
gt_rxpmaresetdone (4) (5) (10) (12) (14)

Output

async

Indicates that the RX PMA reset is complete. Driven Low when GTRXRESET or RXPMARESET is asserted. Available for duplex and RX-only simplex configurations. Available only with GTH transceivers .

gt< lane >_rxprbscntreset_in/
gt_rxprbscntreset (4) (5) (10) (12) (14)

Input

rxoutclk

Resets the PRBS error counter.

gt< lane >_rxprbserr_out/
gt_rxprbserr (4) (5) (10) (12) (14)

Output

rxoutclk

Non-sticky status output indicates that PRBS errors have occurred.

gt< lane >_rxprbssel_in/
gt_rxprbssel (4) (5) (10) (12) (14)

Input

rxoutclk

Receiver PRBS checker test pattern control. Valid settings:

000 : Standard operation (PRBS check off).

001 : PRBS-7.

010 : PRBS-15.

011 : PRBS-23.

100 : PRBS-31.

No checking is done for non-PRBS patterns. Single-bit errors cause bursts of PRBS errors because the PRBS checker uses data from the current cycle to generate expected data for the next cycle.

gt_rxrate (4) (10) (12)

Input

rxoutclk

Dynamic pins to automatically change effective PLL dividers in the GTH transceiver RX. These ports are used for PCI Express ® and other standards. Available only with UltraScale and UltraScale+ FPGAs.

gt< lane >_rxresetdone_out/
gt_rxresetdone (4) (5) (10) (12) (14)

Output

rxoutclk

When asserted, indicates the GTX/GTH/GTY transceiver RX has finished reset and is ready for use. Driven Low when gtrxreset is driven High. Not driven High until rxuserrdy goes High.

gt< lane >_txbufstatus_out/
gt_txbufstatus (4) (5) (10) (11) (14)

Output

user_clk

txbufstatus[1] : TX buffer overflow or underflow status. When txbufstatus[1] is set High, the signal remains High until the TX buffer is reset.

1 : TX FIFO has overflow or underflow.

0 : No TX FIFO overflow or underflow error.

txbufstatus[0] : TX buffer fullness.

1 : TX FIFO is at least half full.

0 : TX FIFO is less than half full.

gt< lane >_txdiffctrl_in/
gt_txdiffctrl (4) (5) (10) (11) (14)

Input

async

Driver Swing Control. Available for duplex and TX-only simplex configurations.

gt<lane>_txinhibit_in/gt_txinhibit
(4) (5) (10) (11) (14)

Input

user_clk

When High, this signal blocks transmission of TXDATA and forces the serial data output pin TXP to 0 and TXN to 1.

gt< lane >_txmaincursor_in (5) (10) (11) (13) (14)

Input

async

Allows the main cursor coefficients to be set directly if the TX_MAINCURSOR_SEL attribute is set to 1'b1 .

gt< lane >_txpcsreset_in/
gt_txpcsreset (4) (5) (10) (11) (14)

Input

async

Resets the TX PCS. Driven High, then deasserted to start the PCS reset process. Activating this port only resets the TX PCS.

gt< lane >_txpmareset_in/
gt_txpmareset (4) (5) (10) (11) (14)

Input

async

Resets the TX PMA. Driven High, then deasserted to start the TX PMA reset process. Activating this port resets both the TX PMA and the TX PCS.

gt< lane >_txpolarity_in/
gt_txpolarity (4) (5) (10) (11) (14)

Input

user_clk

Inverts the polarity of outgoing data.

0 : Not inverted. TXP is positive, and TXN is negative.

1 : Inverted. TXP is negative, and TXN is positive.

gt< lane >_txpostcursor_in/
gt_txpostcursor (4) (5) (10) (11) (14)

Input

async

Transmitter post-cursor TX pre-emphasis control.

gt< lane >_txprbsforceerr_in/
gt_txprbsforceerr (4) (5) (10) (11) (14)

Input

user_clk

When driven High, errors are forced into the PRBS transmitter. While asserted, the output data pattern contains errors. When txprbssel is set to 000 , this port does not affect TXDATA.

gt< lane >_txprbssel_in/
gt_txprbssel (4) (5) (10) (11) (14)

Input

user_clk

Transmitter PRBS generator test pattern control.

For 7 series devices:

000 : Standard mode (pattern generation off).

001 : PRBS-7.

010 : PRBS-15.

011 : PRBS-23.

100 : PRBS-31.

101 : PCI Express compliance pattern. Only works with 20-bit and 40-bit modes.

110 : Square wave with 2 UI (alternating 0s/1s).

111 : Square wave with 16 UI, 20 UI, 32 UI, or 40 UI period (based on data width).

For UltraScale devices:

4'b0000 : Standard mode (pattern generation off).

4'b0001 : PRBS-7.

4'b0010 : PRBS-9.

4'b0011 : PRBS-15.

4'b0100 : PRBS-23.

4'b0101 : PRBS-31.

4'b1000 : PCI Express compliance pattern. Only works with internal data width 20 bit and 40 bit modes.

4'b1001 : Square wave with 2 UI (alternating 0s/1s).

4'b1010 : Square wave with 16 UI, 20 UI, 32 UI, or 40 UI period (based on internal data width).

gt< lane >_txprecursor_in/
gt_txprecusor (4) (5) (10) (11) (14)

Input

async

Transmitter pre-cursor TX pre-emphasis control.

gt< lane >_txresetdone_out/
gt_txresetdone (4) (5) (10) (11) (14)

Output

user_clk

Indicates the GTX/GTH/GTY transceiver TX has finished reset and is ready for use. Driven Low when gttxreset goes High and not driven High until the GTX/GTH/GTY transceiver TX detects txuserrdy High.

gt_qplllock_quad< quad_no >/
gt_qplllock (3) (4) (5) (11) (10)

Output

init_clk

Active-High PLL frequency lock signal. Indicates that the PLL frequency is within predetermined tolerance. The transceiver and its clock outputs are not reliable until this condition is met.

Notes:

1. m is the number of GTX, GTH or GTY transceivers.

2. lane_no varies from 1 to (number of lanes –1).

3. In 7 series FPGAs, quad_no varies from 1 to (number of active transceiver quads –1). In UltraScale and UltraScale+ FPGAs, quad_no varies from 1 to the number of active transceiver quads.

4. Refer to the UltraScale FPGAs GTH Transceivers User Guide (UG576) [Ref 5] or UltraScale Architecture GTY Transceivers User Guide (UG578) [Ref 6] for more information about debug ports.

5. Refer to the 7 series FPGAs Transceivers User Guide (UG476) [Ref 7] for more information about debug ports.

6. In UltraScale and UltraScale+ devices, all DRP and AXI4-Lite ports are sampled on init_clk .

7. The Transceiver_Debug ports are enabled if the Additional transceiver control and status ports option is selected in the Debug and Control section of the Vivado Integrated Design Environment (IDE) Core Options page. For designs using UltraScale and UltraScale+ devices, the prefixes of the optional transceiver debug ports for single-lane cores are changed from gt< lane > to gt, and the postfixes _in and _out are removed. For multi-lane cores, the prefixes of the optional transceiver debug ports gt( n ) are aggregated into a single port.

8. This port is available if the Native option is selected in the DRP Mode section of the Vivado IDE Core Options page.

9. This port is available if the AXI4LITE option is selected in the DRP Mode section of the Vivado IDE Core Options page.

10. This port is available if the Additional transceiver control and status ports option is selected in the DRP Mode section of the Vivado IDE Core Options page.

11. Available for duplex, TX-Only simplex and TX/RX_simplex configurations.

12. Available for duplex, RX-Only simplex and TX/RX_simplex configurations.

13. Not available with UltraScale devices.

14. lane varies from 0 to (number of lanes –1).

15. quad varies from 0 to (number of active transceiver quads –1).

16. Not available in 7 series devices.

17. Refer to the relevant UG Transceiver guide for more information on DRP ports.

18. For GT Channel DRP access you can either select the AXI4-Lite interface or the native interface.

19. GT Common DRP access is not supported.

IMPORTANT: The ports in the Transceiver Control and Status interface must be driven in accordance with the appropriate GT user guide. Using the input signals listed in Table: Transceiver Control and Status Interface Ports improperly might result in unpredictable behavior of the IP core.

This Figure shows the status and control interface for an Aurora 64B/66B duplex core.

Figure 2-31: Aurora 64B/66B Duplex Status and Control Interface

X-Ref Target - Figure 2-31

pg074_duplex_status_control_interface.jpg

This Figure shows the status and control interface for an Aurora 64B/66B TX-only simplex core.

Figure 2-32: Aurora 64B/66B TX-Only Simplex Status and Control Interface

X-Ref Target - Figure 2-32

pg074_tx_simplex_status_control_interface.jpg

This Figure shows the status and control interface for an Aurora 64B/66B RX-only simplex core.

Figure 2-33: Aurora 64B/66B RX-Only Simplex Status and Control Interface

X-Ref Target - Figure 2-33

pg074_rx_simplex_status_control_interface.jpg

This Figure shows the status and control interface for an Aurora 64B/66B TX/RX Simplex core.

Figure 2-34: Aurora 64B/66B TX/RX Simplex Status and Control Interface

X-Ref Target - Figure 2-34

pg074_tx_rx_simplex_status_control_interface.jpg

Loopback support is implemented when the core is generated with the GT outside. Loopback signal can be seen at the top in the example design support.