Altera Video and Image Processing Suite - Manual (Page 132)

Signal Direction Description
control_byteenable
Input
control
slave port Avalon-MM
byteenable
bus. This bus
enables specific byte lane or lanes during transfers. Each
bit in
byteenable
corresponds to a byte in
writedata
and
readdata
.
During writes,
byteenable
specifies which bytes are being
written to; other bytes are ignored by the slave. Slaves that
simply return
readdata
with no side effects are free to
ignore
byteenable
during reads.
control_read
Output
control
slave port Avalon-MM
read
signal. When you
assert this signal, the
control
port sends new data at
readdata
.
control_readdata
Output
control
slave port Avalon-MM
control_data
bus. The
IP core uses these output lines for read transfers.
control_readdatavalid
Output
control
slave port Avalon-MM
readdata
bus. When you
assert this signal, the control port sends new data at
control_readdata
.
control_waitrequest
Output
control
slave port Avalon-MM
waitrequest
signal.
control_write
Input
control
slave port Avalon-MM
write
signal. When you
assert this signal, the
control
port accepts new data from
the
writedata
bus.
control_writedata
Input
control
slave port Avalon-MM
writedata
bus. The IP
core uses these input lines for write transfers.
Video Clipping Control Registers
Table 8-6: Clipper Control Register Map
The control data is read once at the start of each frame and is buffered inside the IP core, so the registers can be
safely updated during the processing of a frame.
Note: All Clipper registers are write-only except at address 1.
Address Register Description
0
Control
Bit 0 of this register is the
Go
bit, all other bits are unused.
Setting this bit to 0 causes the IP core to stop the next time
control information is read.
1
Status
Bit 0 of this register is the
Status
bit, all other bits are unused.
The Clipper IP core sets this address to 0 between frames. It is
set to 1 while the IP core is processing data and cannot be
stopped.
8-6 Video Clipping Control Registers
UG-VIPSUITE
2015.05.04
Altera Corporation Video Clipping IP Cores
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