PS-PL Audio Interface

Zynq UltraScale+ Device Technical Reference Manual (UG1085)

Document ID
UG1085
Release Date
2022-09-15
Revision
2.3 English

On the output interface, the data is at audio frequency, each sample separated by 1/ƒs where ƒs = sampling frequency. Back pressure from PL to PS is not supported.

Table: PS-PL Signals for the Live Audio Interface shows the PS-PL interface signals for live audio interface. The audio_in group of signals is called the S_AXIS_AUDIO interface. The audio_out group of signals is called the M_AXIS_MIXED_AUDIO interface.

 

Table 33-6:      PS-PL Signals for the Live Audio Interface

Signal Name

Type

Initial Value

Description

dp_s_axis_live_audio_tdata[31:0]

Input

Streaming data input.

[3:0] Preamble code (PR).

4'b0001 ® Subframe 1, start of audio block.

4'b0010 ® Subframe 1.

4'b0011 ® Subframe 2.

[27:4] Audio sample word.

[28] Validity bit (V).

[29] User bit (U).

[30] Channel status (C).

[31] Parity (P).

dp_s_axis_live_audio_tid

Input

Audio channel ID.

dp_s_axis_live_audio_tvalid

Input

Valid indicator for audio data from master.

dp_s_axis_live_audio_tready

Output

0

Ready indicator from DisplayPort controller.

dp_s_axis_audio_aclk

Input

Clock for AXI slave audio data input.

dp_m_axis_mixed_audio_tdata[31:0]

Output

0

Streaming data input.

[3:0] Preamble code (PR).

4'b0001 ® Subframe 1, start of audio block.

4'b0010 ® Subframe 1.

4'b0011 ® Subframe 2.

[27:4] Audio sample word.

[28] Validity bit (V).

[29] User bit (U).

[30] Channel status (C).

[31] Parity (P).

dp_m_axis_mixed_audio_tid

Output

0

Audio channel ID.

dp_m_axis_mixed_audio_tvalid

Output

0

Valid indicator for audio data from master.

dp_m_axis_mixed_audio_tready

Input

Ready indicator from PL

Notes:

1.The live audio interface needs to be synchronized with the dp_s_axis_audio_aclk signal.