HDMI Intel® Arria 10 FPGA IP Design Example User Guide

ID 683156
Date 7/29/2022
Public
Document Table of Contents

2.10. Interface Signals

The tables list the signals for the HDMI design example with FRL enabled.
Table 16.  Top-Level Signals
Signal Direction Width Description
On-board Oscillator Signal
clk_fpga_b3_p

Input

1

100 MHz free running clock for core reference clock.

refclk4_p

Input

1

100 MHz free running clock for transceiver reference clock.

User Push Buttons and LEDs
user_pb

Input

3

Push button to control the HDMI Intel® FPGA IP design functionality.

cpu_resetn

Input

1

Global reset.

user_led_g

Output

8

Green LED display.

Refer to Hardware Setup for more information about the LED functions.

user_dipsw

Input

1

User-defined DIP switch.

Refer to Hardware Setup for more information about the DIP switch functions.

HDMI FMC Daughter Card Pins on FMC Port B
fmcb_gbtclk_m2c_p_0

Input

1

HDMI RX TMDS clock.
fmcb_dp_m2c_p

Input

4

HDMI RX clock, red, green, and blue data channels.

fmcb_dp_c2m_p

Output

4

HDMI TX clock, red, green, and blue data channels.

fmcb_la_rx_p_9

Input

1

HDMI RX +5V power detect.

fmcb_la_rx_p_8

Output

1 HDMI RX hot plug detect.
fmcb_la_rx_n_8

Input

1

HDMI RX I2C SDA for DDC and SCDC.

fmcb_la_tx_p_10

Input

1 HDMI RX I2C SCL for DDC and SCDC.
fmcb_la_tx_p_12

Input

1 HDMI TX hot plug detect.
fmcb_la_tx_n_12

Input

1 HDMI I2C SDA for DDC and SCDC.
fmcb_la_rx_p_10

Input

1

HDMI I2C SCL for DDC and SCDC.

fmcb_la_tx_n_9

Input

1

HDMI I2C SDA for redriver control.

fmcb_la_rx_p_11

Input

1

HDMI I2C SCL for redriver control.

fmcb_la_tx_n_13 Output 1 HDMI TX +5V
Table 17.  HDMI RX Top-Level Signals
Signal Direction Width Description
Clock and Reset Signals
mgmt_clk

Input

1

System clock input (100 MHz).

reset

Input

1

System reset input.

rx_tmds_clk

Input

1

HDMI RX TMDS clock.

i2c_clk

Input

1

Clock input for DDC and SCDC interface.

rxphy_cdr_refclk1

Input

1

Clock input for RX CDR reference clock 1. The clock frequency is 100 MHz.

rx_vid_clk

Output

1

Video clock output.

sys_init

Output

1

System initialization to reset the system upon power-up.

RX Transceiver and IOPLL Signals
rxpll_tmds_locked

Output

1

Indicates the TMDS clock IOPLL is locked.

rxpll_frl_locked

Output

1

Indicates the FRL clock IOPLL is locked.

rxphy_serial_data

Input

4

HDMI serial data to the RX Native PHY.

rxphy_ready

Output

1

Indicates the RX Native PHY is ready.

rxphy_cal_busy_raw

Output

4

RX Native PHY calibration busy to the transceiver arbiter.

rxphy_cal_busy_gated

Input

4

Calibration busy signal from the transceiver arbiter to the RX Native PHY.

rxphy_rcfg_slave_write

Input

4

Transceiver reconfiguration Avalon® memory-mapped interface from the RX Native PHY to the transceiver arbiter.

rxphy_rcfg_slave_read

Input

4
rxphy_rcfg_slave_address

Input

40
rxphy_rcfg_slave_writedata

Input

128
rxphy_rcfg_slave_readdata

Output

128
rxphy_rcfg_slave_waitrequest

Output

4
RX Reconfiguration Management
rxphy_rcfg_busy

Output

1

RX Reconfiguration busy signal.

rx_tmds_freq

Output

24

HDMI RX TMDS clock frequency measurement (in 10 ms).

rx_tmds_freq_valid

Output

1

Indicates the RX TMDS clock frequency measurement is valid.

rxphy_os

Output

1
Oversampling factor:
  • 0: 1x oversampling
  • 1: 5× oversampling
rxphy_rcfg_master_write

Output

1

RX reconfiguration management Avalon® memory-mapped interface to transceiver arbiter.

rxphy_rcfg_master_read

Output

1
rxphy_rcfg_master_address

Output

12
rxphy_rcfg_master_writedata

Output

32
rxphy_rcfg_master_readdata

Input

32
rxphy_rcfg_master_waitrequest

Input

1
HDMI RX Core Signals
rx_vid_clk_locked

Input

1

Indicates vid_clk is stable.

rxcore_frl_rate

Output

4

Indicates the FRL rate that the RX core is running.

  • 0: Legacy Mode (TMDS)
  • 1: 3 Gbps 3 lanes
  • 2: 6 Gbps 4 lanes
  • 3: 6 Gbps 4 lanes
  • 4: 8 Gbps 4 lanes
  • 5: 10 Gbps 4 lanes
  • 6: 12 Gbps 4 lanes
  • 7-15: Reserved
rxcore_frl_locked

Output

4

Each bit indicates the specific lane that has achieved FRL lock. FRL is locked when the RX core successfully performs alignment, deskew, and achieves lane lock.

  • For 3-lane mode, lane lock is achieved when the RX core receives Scrambler Reset (SR) or Start-Super-Block (SSB) for every 680 FRL character periods for at least 3 times.
  • For 4-lane mode, lane lock is achieved when the RX core receives Scrambler Reset (SR) or Start-Super-Block (SSB) for every 510 FRL character periods for at least 3 times.
rxcore_frl_ffe_levels

Output

4 Corresponds to the FFE_level bit in the SCDC 0x31 register bit [7:4] in the RX core.
rxcore_frl_flt_ready

Input

1 Asserts to indicate the RX is ready for the link training process to start. When asserted, the FLT_ready bit in the SCDC register 0x40 bit 6 is asserted as well.
rxcore_frl_src_test_config

Input

8 Specifies the source test configurations. The value is written into the SCDC Test Configuration register in the SCDC register 0x35.
rxcore_tbcr

Output

1

Indicates the TMDS bit to clock ratio; corresponds to the TMDS_Bit_Clock_Ratio register in the SCDC register 0x20 bit 1.

  • When running in HDMI 2.0 mode, this bit is asserted. Indicates the TMDS bit to clock ratio of 40:1.
  • When running in HDMI 1.4b, this bit is not asserted. Indicates the TMDS bit to clock ratio of 10:1.
  • This bit is unused for FRL mode.
rxcore_scrambler_enable

Output

1 Indicates if the received data is scrambled; corresponds to the Scrambling_Enable field in the SCDC register 0x20 bit 0.
rxcore_audio_de

Output

1

HDMI RX core audio interfaces

Refer to the Sink Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

rxcore_audio_data

Output

256
rxcore_audio_info_ai

Output

48
rxcore_audio_N

Output

20
rxcore_audio_CTS

Output

20
rxcore_audio_metadata

Output

165
rxcore_audio_format

Output

5
rxcore_aux_pkt_data

Output

72

HDMI RX core auxiliary interfaces

Refer to the Sink Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

rxcore_aux_pkt_addr

Output

6
rxcore_aux_pkt_wr

Output

1
rxcore_aux_data

Output

72
rxcore_aux_sop

Output

1
rxcore_aux_eop

Output

1
rxcore_aux_valid

Output

1
rxcore_aux_error

Output

1
rxcore_gcp

Output

6

HDMI RX core sideband signals

Refer to the Sink Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

rxcore_info_avi

Output

123
rxcore_info_vsi

Output

61
rxcore_locked

Output

1

HDMI RX core video ports

Note: N = pixels per clock

Refer to the Sink Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

rxcore_vid_data

Output

N*48
rxcore_vid_vsync

Output

N
rxcore_vid_hsync

Output

N
rxcore_vid_de

Output

N
rxcore_vid_valid

Output

1
rxcore_vid_lock

Output

1
rxcore_mode

Output

1

HDMI RX core control and status ports.

Note: N = symbols per clock

Refer to the Sink Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

rxcore_ctrl

Output

N*6
rxcore_color_depth_sync

Output

2
hdmi_5v_detect

Input

1

HDMI RX 5V detect and hotplug detect.

Refer to the Sink Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

hdmi_rx_hpd

Output

1
rx_hpd_trigger

Input

1
I2C Signals
hdmi_rx_i2c_sda

Input

1

HDMI RX DDC and SCDC interface.

hdmi_rx_i2c_scl

Input

1
RX EDID RAM Signals
edid_ram_access

Input

1

HDMI RX EDID RAM access interface.

Assert edid_ram_access when you want to write or read from the EDID RAM, else this signal should be kept low.

When you assert edid_ram_access, the hotplug signal deasserts to allow write or read to the EDID RAM. When EDID RAM access is completed, you should deassert edid_ram_assess and the hotplug signal asserts. The source will read the new EDID due to the hotplug signal toggling.

edid_ram_address

Input

8
edid_ram_write

Input

1
edid_ram_read

Input

1
edid_ram_readdata

Output

8
edid_ram_writedata

Input

8
edid_ram_waitrequest

Output

1
Table 18.  HDMI TX Top-Level Signals
Signal Direction Width Description
Clock and Reset Signals
mgmt_clk

Input

1

System clock input (100 MHz).

reset

Input

1

System reset input.

tx_tmds_clk

Input

1

HDMI RX TMDS clock.

txfpll_refclk1

Input

1

Clock input for TX PLL reference clock 1. The clock frequency is 100 MHz.

tx_vid_clk

Output

1

Video clock output.

tx_frl_clk

Output

1

FRL clock output.

sys_init

Input

1

System initialization to reset the system upon power-up.

tx_init_done

Input

1

TX initialization to reset the TX reconfiguration management block and transceiver reconfiguration interface.

TX Transceiver and IOPLL Signals
txpll_frl_locked

Output

1

Indicates the link speed clock and FRL clock IOPLL is locked.

txfpll_locked

Output

1

Indicates the TX PLL is locked.

txphy_serial_data

Output

4

HDMI serial data from the TX Native PHY.

txphy_ready

Output

1

Indicates the TX Native PHY is ready.

txphy_cal_busy

Output

1

TX Native PHY calibration busy signal.

txphy_cal_busy_raw

Output

4

Calibration busy signal to the transceiver arbiter.

txphy_cal_busy_gated

Input

4

Calibration busy signal from the transceiver arbiter to the TX Native PHY.

txphy_rcfg_busy

Output

1

Indicates the TX PHY reconfiguration is in progress.

txphy_rcfg_slave_write

Input

4

Transceiver reconfiguration Avalon® memory-mapped interface from the TX Native PHY to the transceiver arbiter.

txphy_rcfg_slave_read

Input

4
txphy_rcfg_slave_address

Input

40

txphy_rcfg_slave_writedata

Input

128
txphy_rcfg_slave_readdata

Output

128
txphy_rcfg_slave_waitrequest

Output

4
TX Reconfiguration Management
tx_tmds_freq

Input

24

HDMI TX TMDS clock frequency value (in 10 ms).

tx_os

Output

2
Oversampling factor:
  • 0: 1x oversampling
  • 1: 2× oversampling
  • 2: 8x oversampling
txphy_rcfg_master_write

Output

1

TX reconfiguration management Avalon® memory-mapped interface to transceiver arbiter.

txphy_rcfg_master_read

Output

1
txphy_rcfg_master_address

Output

12
txphy_rcfg_master_writedata

Output

32
txphy_rcfg_master_readdata

Input

32
txphy_rcfg_master_waitrequest

Input

1
tx_reconfig_done Output 1

Indicates that the TX reconfiguration process is completed.

HDMI TX Core Signals
tx_vid_clk_locked

Input

1

Indicates vid_clk is stable.

txcore_ctrl

Input

N*6

HDMI TX core control interfaces.

Note: N = pixels per clock

Refer to the Source Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

txcore_mode

Input

1
txcore_audio_de

Input

1

HDMI TX core audio interfaces.

Refer to the Source Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

txcore_audio_mute Input 1
txcore_audio_data

Input

256
txcore_audio_info_ai

Input

49
txcore_audio_N

Input

20
txcore_audio_CTS

Input

20
txcore_audio_metadata

Input

166
txcore_audio_format

Input

5
txcore_aux_ready

Output

1

HDMI TX core auxiliary interfaces.

Refer to the Source Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

txcore_aux_data

Input

72
txcore_aux_sop

Input

1
txcore_aux_eop

Input

1
txcore_aux_valid

Input

1
txcore_gcp

Input

6

HDMI TX core sideband signals.

Refer to the Source Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

txcore_info_avi

Input

123
txcore_info_vsi

Input

62
txcore_i2c_master_write

Input

1

TX I2C master Avalon® memory-mapped interface to I2C master inside the TX core.

Note: These signals are available only when you turn on the Include I2C parameter.
txcore_i2c_master_read

Input

1
txcore_i2c_master_address

Input

4
txcore_i2c_master_writedata

Input

32
txcore_i2c_master_readdata

Output

32
txcore_vid_data

Input

N*48

HDMI TX core video ports.

Note: N = pixels per clock

Refer to the Source Interfaces section in the HDMI Intel® FPGA IP User Guide for more information.

txcore_vid_vsync

Input

N
txcore_vid_hsync

Input

N
txcore_vid_de

Input

N
txcore_vid_ready Output 1
txcore_vid_overflow Output 1
txcore_vid_valid Input 1
txcore_frl_rate Input 4

SCDC register interfaces.

txcore_frl_pattern Input 16
txcore_frl_start Input 1
txcore_scrambler_enable Input 1
txcore_tbcr Input 1
I2C Signals
nios_tx_i2c_sda_in

Output

1

TX I2C Master interface for SCDC and DDC from the Nios® II processor to the output buffer.

Note: If you turn on the Include I2C parameter, these signals will be placed inside the TX core and will not be visible at this level.
nios_tx_i2c_scl_in

Output

1
nios_tx_i2c_sda_oe

Input

1
nios_tx_i2c_scl_oe

Input

1
nios_ti_i2c_sda_in

Output

1

TX I2C Master interface from the Nios® II processor to the output buffer to control TI redriver on the Bitec HDMI 2.1 FMC daughter card.

nios_ti_i2c_scl_in

Output

1
nios_ti_i2c_sda_oe

Input

1
nios_ti_i2c_scl_oe Input 1
hdmi_tx_i2c_sda

Input

1

TX I2C interfaces for SCDC and DDC interfaces from the output buffer to the HDMI TX connector.

hdmi_tx_i2c_scl

Input

1
hdmi_tx_ti_i2c_sda Input 1

TX I2C interfaces from the output buffer to the TI redriver on the Bitec HDMI 2.1 FMC daughter card.

hdmi_tx_ti_i2c_scl Input 1
Hotplug Detect Signals
tx_hpd_req

Output

1 HDMI TX hotplug detect interfaces.
hdmi_tx_hpd_n

Input

1
Table 19.  Transceiver Arbiter Signals
Signal Direction Width Description
clk

Input

1

Reconfiguration clock. This clock must share the same clock with the reconfiguration management blocks.

reset

Input

1

Reset signal. This reset must share the same reset with the reconfiguration management blocks.

rx_rcfg_en

Input

1

RX reconfiguration enable signal.

tx_rcfg_en

Input

1

TX reconfiguration enable signal.

rx_rcfg_ch

Input

2

Indicates which channel to be reconfigured on the RX core. This signal must always remain asserted.

tx_rcfg_ch

Input

2

Indicates which channel to be reconfigured on the TX core. This signal must always remain asserted.

rx_reconfig_mgmt_write

Input

1

Reconfiguration Avalon® memory-mapped interfaces from the RX reconfiguration management.

rx_reconfig_mgmt_read

Input

1
rx_reconfig_mgmt_address

Input

10

rx_reconfig_mgmt_writedata

Input

32
rx_reconfig_mgmt_readdata

Output

32
rx_reconfig_mgmt_waitrequest

Output

1
tx_reconfig_mgmt_write

Input

1

Reconfiguration Avalon® memory-mapped interfaces from the TX reconfiguration management.

tx_reconfig_mgmt_read

Input

1
tx_reconfig_mgmt_address

Input

10

tx_reconfig_mgmt_writedata

Input

32
tx_reconfig_mgmt_readdata

Output

32
tx_reconfig_mgmt_waitrequest

Output

1
reconfig_write

Output

1

Reconfiguration Avalon® memory-mapped interfaces to the transceiver.

reconfig_read

Output

1
reconfig_address

Output

10

reconfig_writedata

Output

32
rx_reconfig_readdata

Input

32
rx_reconfig_waitrequest

Input

1
tx_reconfig_readdata

Input

1
tx_reconfig_waitrequest

Input

1
rx_cal_busy

Input

1

Calibration status signal from the RX transceiver.

tx_cal_busy

Input

1

Calibration status signal from the TX transceiver.

rx_reconfig_cal_busy

Output

1

Calibration status signal to the RX transceiver PHY reset control.

tx_reconfig_cal_busy

Output

1

Calibration status signal from the TX transceiver PHY reset control.

Table 20.  RX-TX Link Signals
Signal Direction Width Description
vid_clk

Input

1

HDMI video clock.

rx_vid_lock

Input

3

Indicates HDMI RX video lock status.

rx_vid_valid

Input

1 HDMI RX video interfaces.
rx_vid_de

Input

N
rx_vid_hsync

Input

N
rx_vid_vsync

Input

N
rx_vid_data

Input

N*48
rx_aux_eop

Input

1

HDMI RX auxiliary interfaces.

rx_aux_sop

Input

1
rx_aux_valid

Input

1
rx_aux_data

Input

72
tx_vid_de

Output

N

HDMI TX video interfaces.

Note: N = pixels per clock
tx_vid_hsync

Output

N
tx_vid_vsync

Output

N
tx_vid_data

Output

N*48
tx_vid_valid

Output

1
tx_vid_ready

Input

1
tx_aux_eop

Output

1

HDMI TX auxiliary interfaces.

tx_aux_sop

Output

1
tx_aux_valid

Output

1
tx_aux_data

Output

72
tx_aux_ready

Input

1
Table 21.   Platform Designer System Signals
Signal Direction Width Description
cpu_clk_in_clk_clk

Input

1

CPU clock.

cpu_rst_in_reset_reset

Input

1

CPU reset.

edid_ram_slave_translator_avalon_anti_slave_0_address

Output

8

EDID RAM access interfaces.

edid_ram_slave_translator_avalon_anti_slave_0_write

Output

1
edid_ram_slave_translator_avalon_anti_slave_0_read

Output

1
edid_ram_slave_translator_avalon_anti_slave_0_readdata

Input

8
edid_ram_slave_translator_avalon_anti_slave_0_writedata

Output

8
edid_ram_slave_translator_avalon_anti_slave_0_waitrequest

Input

1
hdmi_i2c_master_i2c_serial_sda_in

Input

1

I2C Master interfaces from the Nios® II processor to the output buffer for DDC and SCDC control.

hdmi_i2c_master_i2c_serial_scl_in

Input

1
hdmi_i2c_master_i2c_serial_sda_oe

Output

1
hdmi_i2c_master_i2c_serial_scl_oe

Output

1
redriver_i2c_master_i2c_serial_sda_in

Input

1 I2C Master interfaces from the Nios® II processor to the output buffer for TI redriver setting configuration.
redriver_i2c_master_i2c_serial_scl_in

Input

1
redriver_i2c_master_i2c_serial_sda_oe

Output

1
redriver_i2c_master_i2c_serial_scl_oe

Output

1
pio_in0_external_connection_export

Input

32

Parallel input output interfaces.

  • Bit 0: Connected to the user_dipsw signal to control EDID passthrough mode.
  • Bit 1: TX HPD request
  • Bit 2: TX transceiver ready
  • Bits 3: TX reconfiguration done
  • Bits 4–7: Reserved
  • Bits 8–11: RX FRL rate
  • Bit 12: RX TMDS bit clock ratio
  • Bits 13–16: RX FRL locked
  • Bits 17–20: RX FFE levels
  • Bit 21: RX alignment locked
  • Bit 22: RX video lock
  • Bit 23: User push button 2 to read SCDC registers from external sink
  • Bits 24–31: Reserved
pio_out0_external_connection_export

Output

32

Parallel input output interfaces.

  • Bit 0: TX HPD acknowledgment
  • Bit 1: TX initialization is done
  • Bits 2–7: Reserved
  • Bits 8–11: TX FRL rate
  • Bits 12–27: TX FRL link training pattern
  • Bit 28: TX FRL start
  • Bits 29–31: Reserved
pio_out1_external_connection_export

Output

32

Parallel input output interfaces.

  • Bit 0: RX EDID RAM access
  • Bit 1: RX FLT ready
  • Bits 2–7: Reserved
  • Bits 8–15: RX FRL source test configuration
  • Bits 16–31: Reserved

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