Altera Serial Digital Interface (SDI) MegaCore Function - Manual (Page 105)

Chapter 4: SDI Audio IP Cores 4–17
Clocked Audio Input MegaCore Function
February 2013 Altera Corporation Serial Digital Interface (SDI) MegaCore Function
User Guide
Clocked Audio Input MegaCore Function
The Clocked Audio Input MegaCore function converts clocked audio in AES formats
to Avalon-ST audio.
For a typical AES input, for each channel, the Clocked Audio Input function creates a
192-bit validity word, user word and channel status word, and presents the words as
a control packet after the audio data packet.
Parameters
Table 4–18 lists the MegaWizard Plug-In Manager parameters for the SDI Clocked
Audio Input MegaCore function.
Signals
Table 4–19 lists the Avalon-ST audio signals when you instantiate the SDI Clocked
Audio Input MegaCore function in SOPC Builder.
Table 4–20 lists the Avalon-ST audio signals when you instantiate the SDI Clocked
Audio Input MegaCore function in SOPC Builder.
Table 4–18. SDI Clocked Audio Input MegaCore Function Parameters
Parameter Value Description
FIFO size 3–10
Defines the internal FIFO depth.
For example, a value of 3 means 2 3 = 8.
Include Avalon-MM control
interface
On or off
Turn on to include the Avalon-MM control interface.
When you turn on this parameter, the register interface signals
in
Table 4–7 appear at the top level. Otherwise, the direct
control interface signals in Table 4–21 appear at the top level.
Table 4–19. Audio Input Signals
Signal Width Direction Description
aes_clk [0:0] Input Audio input clock.
aes_de [0:0] Input Audio data enable.
aes_ws [0:0] Input Audio word select.
aes_data [0:0] Input Audio data input in internal AES format.
Table 4–20. Avalon-ST Audio Signals (Part 1 of 2)
Signal Width Direction Description
aud_clk [0:0] Input
Clocked audio clock. All the audio input signals are
synchronous to this clock.
aud_ready [0:0] Input
Avalon-ST ready signal. Assert this signal when the
device is able to receive data.
aud_valid [0:0] Output
Avalon-ST valid signal. The MegaCore function
asserts this signal when it is outputs data.