HDMI Intel® Cyclone® 10 GX FGPA IP Design Example User Guide

ID 683309
Date 1/26/2024
Public

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2.5. Interface Signals

The tables list the signals for the HDMI Intel® FPGA IP design example.
Table 15.  Top-Level Signals
Signal Direction Width Description
On-board Oscillator Signal
c10_refclk2_p

Input

1

100 MHz free running clock for core reference clock.

usb_refclk_p Input 1

125 MHz free running clock for transceiver reference clock; this clock can be of any frequency.

User Push Buttons and LEDs
user_pb

Input

1

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

user_dipsw

Input

1

DIP switch to send the DVI or HDMI encoded signal.

user_led_g

Output

4

Green LED display

HDMI FMC Daughter Card Pins on FMC Port
fmc_gbtclk_m2c_p_0

Input

1

HDMI RX TMDS clock
fmc_dp_m2c_p

Input

3

HDMI RX red, green, and blue data channels

fmc_dp_c2m_p

Output

4

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

fmc_la_rx_p_9

Input

1

HDMI RX +5V power detect

fmc_la_rx_p_8

Inout

1 HDMI RX hot plug detect
fmc_la_rx_n_8

Inout

1

HDMI RX I2C SDA for DDC and SCDC

fmc_la_tx_p_10

Input

1 HDMI RX I2C SCL for DDC and SCDC
fmc_la_tx_p_12

Input

1 HDMI TX hot plug detect
fmc_la_tx_n_12

Inout

1 HDMI I2C SDA for DDC and SCDC
fmc_la_rx_p_10

Inout

1

HDMI I2C SCL for DDC and SCDC

fmc_la_tx_p_11 Inout 1 HDMI I2C SDA for redriver control
fmc_la_rx_n_9 Inout 1

HDMI I2C SCL for redriver control

Table 16.  HDMI RX Top-Level Signals
Signal Direction Width Description
Clock and Reset Signals
mgmt_clk

Input

1

System clock input (100 MHz)

fr_clk Input 1 Free running clock (625 MHz) for primary transceiver reference clock. This clock is required for transceiver calibration during power-up state.
reset

Input

1

System reset input

reset_xcvr_powerup Input 1 Transceiver reset input. This signal is asserted during the reference clocks switching process (from free running clock to TMDS clock) in power-up state.
tmds_clk_in

Input

1

HDMI RX TMDS clock

i2c_clk

Input

1

Clock input for DDC and SCDC interface

vid_clk_out

Output

1

Video clock output

ls_clk_out

Output

8

Link speed clock output

sys_init

Output

1

System initialization to reset the system upon power-up

RX Transceiver and IOPLL Signals
rx_serial_data

Input

3

HDMI serial data to the RX Native PHY

gxb_rx_ready

Output

1

Indicates RX Native PHY is ready

gxb_rx_cal_busy_out

Output

3

RX Native PHY calibration busy to the transceiver arbiter

gxb_rx_cal_busy_in

Input

3

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

iopll_locked

Output

1

Indicate IOPLL is locked

gxb_reconfig_write

Input

3

Transceiver reconfiguration Avalon-MM interface from the RX Native PHY to the transceiver arbiter

gxb_reconfig_read

Input

3
gxb_reconfig_address

Input

30

gxb_reconfig_writedata

Input

96
gxb_reconfig_readdata

Output

96
gxb_reconfig_waitrequest

Output

3
RX Reconfiguration Management
rx_reconfig_en

Output

1

RX Reconfiguration enables signal

measure

Output

24

HDMI RX TMDS clock frequency measurement (in 10 ms)

measure_valid

Output

1

Indicates the measure signal is valid

os

Output

1
Oversampling factor:
  • 0: No oversampling
  • 1: 5× oversampling
reconfig_mgmt_write

Output

1

RX reconfiguration management Avalon memory-mapped interface to transceiver arbiter

reconfig_mgmt_read

Output

1
reconfig_mgmt_address

Output

12

reconfig_mgmt_writedata

Output

32
reconfig_mgmt_readdata

Input

32
reconfig_mgmt_waitrequest

Input

1
HDMI RX Core Signals
TMDS_Bit_clock_Ratio

Output

1

SCDC register interfaces

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.

audio_data

Output

256
audio_info_ai

Output

48
audio_N

Output

20
audio_CTS

Output

20
audio_metadata

Output

165
audio_format

Output

5
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.

aux_pkt_addr

Output

6
aux_pkt_wr

Output

1
aux_data

Output

72
aux_sop

Output

1
aux_eop

Output

1
aux_valid

Output

1
aux_error

Output

1
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.

info_avi

Output

112
info_vsi

Output

61
colordepth_mgmt_sync

Output

2
vid_data

Output

N*48

HDMI RX core video ports

Note: N = symbols per clock

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

vid_vsync

Output

N
vid_hsync

Output

N
vid_de

Output

N
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.

ctrl

Output

N*6
locked

Output

3
vid_lock

Output

1
in_5v_power

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_n

Inout

1
I2C Signals
hdmi_rx_i2c_sda

Inout

1

HDMI RX DDC and SCDC interface

hdmi_rx_i2c_scl

Inout

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.

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 17.  HDMI TX Top-Level Signals
Signal Direction Width Description
Clock and Reset Signals
mgmt_clk

Input

1

System clock input (100 MHz)

fr_clk Input 1 Free running clock (625 MHz) for primary transceiver reference clock. This clock is required for transceiver calibration during power-up state.
reset

Input

1

System reset input

hdmi_clk_in

Input

1

Reference clock to TX IOPLL and TX PLL. The clock frequency is the same as the TMDS clock frequency.

vid_clk_out

Output

1

Video clock output

ls_clk_out

Output

8

Link speed clock output

sys_init

Output

1

System initialization to reset the system upon power-up

reset_xcvr

Input

1

Reset to TX transceiver

reset_pll

Input

1 Reset to IOPLL and TX PLL
reset_pll_reconfig

Output

1

Reset to PLL reconfiguration

TX Transceiver and IOPLL Signals
tx_serial_data

Output

4

HDMI serial data from the TX Native PHY

gxb_tx_ready

Output

1

Indicates TX Native PHY is ready

gxb_tx_cal_busy_out

Output

4

TX Native PHY calibration busy signal to the transceiver arbiter

gxb_tx_cal_busy_in

Input

4

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

iopll_locked

Output

1

Indicate IOPLL is locked

txpll_locked

Output

1

Indicate TX PLL is locked

gxb_reconfig_write

Input

4

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

gxb_reconfig_read

Input

4
gxb_reconfig_address

Input

40

gxb_reconfig_writedata

Input

128
gxb_reconfig_readdata

Output

128
gxb_reconfig_waitrequest

Output

4
TX IOPLL and TX PLL Reconfiguration Signals
pll_reconfig_write/tx_pll_reconfig_write

Input

1

TX IOPLL/TX PLL reconfiguration Avalon memory-mapped interfaces

pll_reconfig_read/tx_pll_reconfig_read

Input

1
pll_reconfig_address/tx_pll_reconfig_address

Input

10
pll_reconfig_writedata/tx_pll_reconfig_writedata

Input

32
pll_reconfig_readdata/tx_pll_reconfig_readdata

Output

32
pll_reconfig_waitrequest/tx_pll_reconfig_waitrequest

Output

1
os

Input

2
Oversampling factor:
  • 0: No oversampling
  • 1: 3× oversampling
  • 2: 4× oversampling
  • 3: 5× oversampling
measure

Input

24

Indicates the TMDS clock frequency of the transmitting video resolution.

HDMI TX Core Signals
ctrl

Input

6*N

HDMI TX core control interfaces

Note: N = Symbols per clock

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

mode

Input

1
TMDS_Bit_clock_Ratio

Input

1

SCDC register interfaces

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

Scrambler_Enable

Input

1
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.

audio_mute Input 1
audio_data

Input

256
audio_info_ai

Input

49
audio_N

Input

22
audio_CTS

Input

22
audio_metadata

Input

166
audio_format

Input

5
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.
i2c_master_read

Input

1
i2c_master_address

Input

4
i2c_master_writedata

Input

32
i2c_master_readdata

Output

32
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.

aux_data

Input

72
aux_sop

Input

1
aux_eop

Input

1
aux_valid

Input

1
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.

info_avi

Input

113
info_vsi

Input

62
vid_data

Input

N*48

HDMI TX core video ports

Note: N = symbols per clock

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

vid_vsync

Input

N
vid_hsync

Input

N
vid_de

Input

N
I2C and Hot Plug Detect Signals
nios_tx_i2c_sda_in
Note: When you turn on the Include I2C parameter, this signal is placed in the TX core and will not be visible at this level.

Output

1

I2C Master Avalon® memory-mapped interfaces

nios_tx_i2c_scl_in
Note: When you turn on the Include I2C parameter, this signal is placed in the TX core and will not be visible at this level.

Output

1
nios_tx_i2c_sda_oe
Note: When you turn on the Include I2C parameter, this signal is placed in the TX core and will not be visible at this level.

Input

1
nios_tx_i2c_scl_oe
Note: When you turn on the Include I2C parameter, this signal is placed in the TX core and will not be visible at this level.

Input

1
nios_ti_i2c_sda_in

Output

1
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

Inout

1 HDMI TX DDC and SCDC interfaces
hdmi_tx_i2c_scl

Inout

1
hdmi_ti_i2c_sda Inout 1 I2C interface for Bitec Daughter Card Revision 11 TI181 Control
hdmi_ti_i2c_scl Inout 1
hdmi_tx_hpd_n

Input

1 HDMI TX hotplug detect interfaces
tx_hpd_ack

Input

1
tx_hpd_req

Output

1
Table 18.  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-MM 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-MM 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-MM 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 19.  RX-TX Link Signals
Signal Direction Width Description
reset

Input

1

Reset to the video/audio/auxiliary/sidebands FIFO buffer.

mgmt_clk

Input

1

100 MHz clock

i2c_clk

Input

1

I2C clock

hdmi_tx_ls_clk

Input

1

HDMI TX link speed clock

hdmi_rx_ls_clk

Input

1

HDMI RX link speed clock

hdmi_tx_vid_clk

Input

1

HDMI TX video clock

hdmi_rx_vid_clk

Input

1

HDMI RX video clock

sys_init

Input

1

System initialization to reset the system upon power-up

wd_reset

Input

1

Watchdog timer reset

hdmi_rx_locked

Input

3

Indicates HDMI RX locked status

hdmi_rx_de

Input

N

HDMI RX video interfaces

Note: N = symbols per clock
hdmi_rx_hsync

Input

N
hdmi_rx_vsync

Input

N
hdmi_rx_data

Input

N*48
rx_audio_format

Input

5

HDMI RX audio interfaces

rx_audio_metadata

Input

165
rx_audio_info_ai

Input

48
rx_audio_CTS

Input

20
rx_audio_N

Input

20
rx_audio_de

Input

1
rx_audio_data

Input

256
rx_gcp

Input

6

HDMI RX sideband interfaces

rx_info_avi

Input

112
rx_info_vsi

Input

61
rx_aux_eop

Input

1

HDMI RX auxiliary interfaces

rx_aux_sop

Input

1
rx_aux_valid

Input

1
rx_aux_data

Input

72
hdmi_tx_de

Output

N

HDMI TX video interfaces

Note: N = symbols per clock
hdmi_tx_hsync

Output

N
hdmi_tx_vsync

Output

N
hdmi_tx_data

Output

N*48
tx_audio_format

Output

5

HDMI TX audio interfaces

tx_audio_metadata

Output

165
tx_audio_info_ai

Output

48
tx_audio_CTS

Output

20
tx_audio_N

Output

20
tx_audio_de

Output

1
tx_audio_data

Output

256
tx_gcp

Output

6

HDMI TX sideband interfaces

tx_info_avi

Output

112
tx_info_vsi

Output

61
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

Output

1
Table 20.   Platform Designer System Signals
Signal Direction Width Description
clock_bridge_0_in_clk_clk

Input

1

CPU clock

reset_bridge_0_reset_reset_n

Input

1

CPU reset

tmds_bit_clock_ratio_pio_external_connection_export

Input

1

TMDS bit clock ratio

measure_pio_external_connection_export

Input

24

Expected TMDS clock frequency

measure_valid_pio_external_connection_export

Input

1

Indicates measure PIO is valid

i2c_master_i2c_serial_sda_in

Input

1

I2C Master interfaces

i2c_master_i2c_serial_scl_in

Input

1
i2c_master_i2c_serial_sda_oe

Output

1
i2c_master_i2c_serial_scl_oe

Output

1
i2c_master_ti_i2c_serial_sda_in

Input

1
i2c_master_ti_i2c_serial_scl_in

Input

1
i2c_master_ti_i2c_serial_sda_oe

Output

1
i2c_master_ti_i2c_serial_scl_oe

Output

1
edid_ram_access_pio_external_connection_export

Output

1

EDID RAM access interfaces.

Assert edid_ram_access_pio_external_connection_export when you want to write to or read from the EDID RAM on the RX top. Connect EDID RAM access Avalon-MM slave in Platform Designer to the EDID RAM interface on the top-level RX modules.

edid_ram_slave_translator_address

Output

8
edid_ram_slave_translator_write

Output

1
edid_ram_slave_translator_read

Output

1
edid_ram_slave_translator_readdata

Input

8
edid_ram_slave_translator_writedata

Output

8
edid_ram_slave_translator_waitrequest

Input

1
powerup_cal_done_export Input 1 RX PMA Reconfiguration Avalon® memory-mapped interfaces
rx_pma_cal_busy_export Input 1
rx_pma_ch_export Output 2
rx_pma_rcfg_mgmt_address Output 12
rx_pma_rcfg_mgmt_write Output 1
rx_pma_rcfg_mgmt_read Output 1
rx_pma_rcfg_mgmt_readdata Input 32
rx_pma_rcfg_mgmt_writedata Output 32
rx_pma_rcfg_mgmt_waitrequest Input 1
rx_pma_waitrequest_export Input 1
rx_rcfg_en_export Output 1
rx_rst_xcvr_export Output 1
tx_pll_rcfg_mgmt_translator_avalon_anti_slave_waitrequest

Input

1

TX PLL Reconfiguration Avalon® memory-mapped interfaces

tx_pll_rcfg_mgmt_translator_avalon_anti_slave_writedata

Output

32
tx_pll_rcfg_mgmt_translator_avalon_anti_slave_address

Output

10

tx_pll_rcfg_mgmt_translator_avalon_anti_slave_write

Output

1
tx_pll_rcfg_mgmt_translator_avalon_anti_slave_read

Output

1
tx_pll_rcfg_mgmt_translator_avalon_anti_slave_readdata

Input

32
tx_pll_waitrequest_pio_external_connection_export

Input

1

TX PLL waitrequest

tx_pma_rcfg_mgmt_translator_avalon_anti_slave_address

Output

12

TX PMA Reconfiguration Avalon® memory-mapped interfaces

tx_pma_rcfg_mgmt_translator_avalon_anti_slave_write

Output

1
tx_pma_rcfg_mgmt_translator_avalon_anti_slave_read

Output

1
tx_pma_rcfg_mgmt_translator_avalon_anti_slave_readdata

Input

32
tx_pma_rcfg_mgmt_translator_avalon_anti_slave_writedata

Output

32
tx_pma_rcfg_mgmt_translator_avalon_anti_slave_waitrequest

Input

1
tx_pma_waitrequest_pio_external_connection_export

Input

1

TX PMA waitrequest

tx_pma_cal_busy_pio_external_connection_export

Input

1

TX PMA Recalibration Busy

tx_pma_ch_export

Output

2

TX PMA Channels

tx_rcfg_en_pio_external_connection_export    

TX PMA Reconfiguration Enable

tx_iopll_rcfg_mgmt_translator_avalon_anti_slave_writedata

Output

32

TX IOPLL Reconfiguration Avalon® memory-mapped interfaces

tx_iopll_rcfg_mgmt_translator_avalon_anti_slave_address

Output

9
tx_iopll_rcfg_mgmt_translator_avalon_anti_slave_write

Output

1
tx_iopll_rcfg_mgmt_translator_avalon_anti_slave_read

Output

1
tx_iopll_rcfg_mgmt_translator_avalon_anti_slave_readdata

Input

32
tx_os_pio_external_connection_export

Output

2
Oversampling factor:
  • 0: No oversampling
  • 1: 3× oversampling
  • 2: 4× oversampling
  • 3: 5× oversampling
tx_rst_pll_pio_external_connection_export

Output

1

Reset to IOPLL and TX PLL

tx_rst_xcvr_pio_external_connection_export

Output

1

Reset to TX Native PHY

wd_timer_resetrequest_reset

Output

1

Watchdog timer reset

color_depth_pio_external_connection_export

Input

2

Color depth

tx_hpd_ack_pio_external_connection_export

Output

1

For TX hotplug detect handshaking

tx_hpd_req_pio_external_connection_export

Input

1