SDI IP Core User Guide

ID 683587
Date 8/20/2020
Public
Document Table of Contents

4.3. SDI Status Signals

Signal

Width

Direction

Description

rx_anc_data [(20N–1):0] Output
Received ancillary data.
  • SD-SDI: bits 19:10 unused; bits 9:0 Cb, Y, Cr, Y multiplex
  • HD-SDI: bits 19:10 Y; bits 9:0 C
  • Dual link: bits 39:30 Y (link B); bits 29:20 C (link B); bits 19:10 Y (link A); bits 9:0 C (link A)
  • 3G-SDI Level A: bits 19:10 Y; bits 9:0 C
  • 3G-SDI Level B: bits 19:10 Cb, Y, Cr, Y multiplex (link A); bits 9:0 Cb, Y, Cr, Y multiplex (link B)
rx_anc_error [3:0] Output
Ancillary data or checksum error.
  • SD-SDI: bits 3:1 unused; bits 0 rx_anc_error
  • HD-SDI: bits 3:2 unused; bit 1 Y; bit 0 C
  • Dual link: bit 3 Y (link B); bit 2 C (link B); bit 1 Y (link A); bit 0 C (link A)
  • 3G-SDI Level A: bits 3:2 unused; bit 1 Y; bit 0 C
  • 3G-SDI Level B: bit 3 Y (link A); bit 2 C (link A); bit 1 Y (link B); bit 0 C (link B)
rx_anc_valid [3:0] Output
Ancillary data valid. Asserted to accompany data ID (DID), secondary data ID/data block number (SDID/DBN), data count (DC), and user data words (UDW) on rx_anc_data.
  • SD-SDI: bits 3:1 unused; bits 0 rx_anc_valid
  • HD-SDI: bits 3:2 unused; bit 1 Y; bit 0 C
  • Dual link: bit 3 Y (link B); bit 2 C (link B); bit 1 Y (link A); bit 0 C (link A)
  • 3G-SDI Level A: bits 3:2 unused; bit 1 Y; bit 0 C
  • 3G-SDI Level B: bit 3 Y (link A); bit 2 C (link A); bit 1 Y (link B); bit 0 C (link B)
rx_status [10:0] Output

This signal is active low for the transceiver-based device families.

Receiver status:
  • rx_status[10] dual link ports aligned
  • rx_status[9] link B frame locked
  • rx_status[8] link B TRS locked (six consecutive TRSs with same timing)
  • rx_status[7] link B alignment locked (a TRS has been spotted and word alignment performed)
  • rx_status[6] link B receiver in reset
  • rx_status[5] link B transceiver PLL locked
  • rx_status[4] link A frame locked
  • rx_status[3] link A TRS locked (six consecutive TRSs with same timing
  • rx_status[2] link A alignment locked (a TRS has been spotted and word alignment performed)
  • rx_status[1] link A receiver in reset
  • rx_status[0] link A transceiver PLL locked

For non HD-SDI dual link versions, only bits [4:0] are active.

For transceiver only receiver block in HD-SDI dual link versions, only bits [6:5] and [1:0] are active.

This signal indicates lock of the PLL when the transceiver is training from a refclk source. This signal may oscillate when the transceiver is correctly locked to the incoming data in HD-SDI or 3G-SDI modes. In SD-SDI modes, maintain this signal at PLL locked at all times.

For rx_status[3] and rx_status[8], the TRS spacing is not required to meet a particular SMPTE standard, but it must be consistent over time for this signal to remain active.

tx_status [(N– 1):0] Output

This signal is active low for the transceiver-based device families.

Transmitter status, which indicates the transmitter PLL has locked to the tx_serial_refclk signal.

The following figures show the behavior of the rx_anc_data signal.

Figure 33. Behavior of rx_anc_data/valid/error Signals—425MA/HD
Figure 34. Behavior of rx_anc_data/valid/error Signals—425MB
Figure 35. Behavior of rx_anc_data/valid/error Signals Without Error—SD
Figure 36. Behavior of rx_anc_data/valid/error Signals With Error—SD