User guide

17–4 Chapter 17: Frame Reader MegaCore Function
Signals
Video and Image Processing Suite January 2013 Altera Corporation
User Guide
Signals
Table 17–3 lists the input and output signals for the Frame Reader MegaCore function.
Read master FIFO burst target 2–256, Default = 32 The target burst size of the read master
Use separate clock for the Avalon-
MM master interface
On or Off Use separate clock for the Avalon-MM master interface
Table 17–2. Frame Reader Parameter Settings (Part 2 of 2)
Parameter Value Description
Table 17–3. Frame Reader Signals (Part 1 of 2)
Signal Direction Description
clock In
The main system clock. The MegaCore function operates on the
rising edge of the
clock signal.
reset In
The MegaCore function asynchronously resets when you assert
reset . You must deassert reset synchronously to the rising
edge of the
clock signal.
dout_data Out
dout port Avalon-ST data bus. This bus enables the
transfer of pixel data out of the MegaCore function.
dout_endofpacket Out
dout port Avalon-ST endofpacket signal. This signal
marks the end of an Avalon-ST packet.
dout_ready In
dout port Avalon-ST ready signal. The downstream
device asserts this signal when it is able to receive data.
dout_startofpacket Out
dout port Avalon-ST startofpacket signal. This
signal marks the start of an Avalon-ST packet.
dout_valid Out
dout port Avalon-ST valid signal. This signal is
asserted when the MegaCore function outputs data.
slave_av_address In
slave port Avalon-MM address. Specifies a word offset
into the slave address space.
slave_av_read In
slave port Avalon-MM read signal. When you assert
this signal, the slave port drives new data onto the read data bus.
slave_av_readdata Out
slave port Avalon-MM readdata bus. These output
lines are used for read transfers.
slave_av_write In
slave port Avalon-MM write signal. When you assert
this signal, the gamma_lut port accepts new data from the
writedata bus.
slave_av_writedata In
slave port Avalon-MM writedata bus. These input
lines are used for write transfers.
slave_av_irq Out
slave port Avalon-MM interrupt signal. When
asserted the interrupt registers of the MegaCore function have
been updated and the master must read them to determine what
has occurred.
master_av_address Out
master port Avalon-MM address bus. Specifies a byte
address in the Avalon-MM address space.
master_av_burstcount Out
master port Avalon-MM burstcount signal. Specifies
the number of transfers in each burst.