Altera Video and Image Processing Suite Manuel d'utilisateur Page 132

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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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