HDMI 1.4/2.0 TX Subsystem
29
PG235 October 4, 2017
Chapter
2:
Product Specification
Audio Input Stream Interface
shows the signals for AXI4-Stream audio input streaming interfaces. The audio
interface transports 24-bits audio samples in the IEC 60958 format. A maximum of eight
channels are supported. The audio interface is a 32-bit AXI4-Stream slave interface and runs
at the
s_axis_audio_aclk
clock rate.
Audio Clock Regeneration Interface
The audio clock regeneration (ACR) interface has a Cycle Time Stamp (CTS) parameter
vector and an Audio Clock Regeneration Value (N) parameter vector. Both vectors are 20
VIDEO_IN_vsync
Input
1
Vertical sync
Notes:
1. When native video interface is selected, s_axis_video_aclk and s_axis_video_aresetn are removed from the HDMI
1.4/2.0 Transmitter Subsystem interface ports.
2. video_clk is generated by
Video PHY Controller LogiCORE IP Product Guide
(PG230)
.
3. When native video interface is selected, there is no hardware reset.
4. You must provide the correct video timing information. You can choose to use Xilinx Video Timing Controller (vtc)
or design your own vtc module to generate the timing control signals for native video interface.
Table
2
‐
4:
Audio Input Stream Interface
Name
Direction
Width
Description
s_axis_audio_aclk
Input 1
Clock (The audio streaming clock must be
greater than or equal or greater than 128 times
the audio sample frequency)
s_axis_audio_aresetn
Input 1
Reset
(Active-Low)
AUDIO_IN_tdata
Input
32
Data
[31] P (Parity)
[30] C (Channel status)
[29] U (User bit)
[28] V (Validity bit)
[27:4] Audio sample word
[3:0] Preamble code
4'b0001 Subframe 1/start of audio block
4'b0010 Subframe 1
4'b0011 Subframe 2
AUDIO_IN_tid
Input
3
Channel ID
AUDIO_IN_tready
Output
1
Ready
AUDIO_IN_tvalid
Input
1
Valid
Table
2
‐
3:
Native Video InputInterface
(Cont’d)
Name
Direction
Width
Description