Altera Video and Image Processing Suite Bedienungsanleitung Seite 242

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Table 18-6: Switch II Control Register Map
The table below describes the control register map for Switch II IP core.
Address Register Description
0 Control Bit 0 of this register is the Go bit.
Writing a 1 to bit 0 starts the IP core.
Writing a 0 to bit 0 stops the IP core.
Bit 1 of this register is the interrupt enable bit.
Setting this bit to 1 enables the switching complete interrupt.
1 Status Bit 0 of this register is the Status bit, all other bits are unused.
Reading a 1 from bit 0 indicates the IP core is running—video
is flowing through it.
Reading a 0 from bit 0 indicates that the IP has stopped
running.
2 Interrupt
Bit 0 is the interrupt status bit. When bit 0 is asserted, the
switching complete interrupt has triggered.
Because the Switch II IP core can only change routing configura‐
tion at the end of a video frame, this interrupt triggers to indicate
that the requested reconfiguration has completed.
3 Output Switch Writing a 1 to bit 0 indicates that the video output streams must
be synchronized; and the new values in the output control
registers must be loaded.
4 Dout0 Output Control A one-hot value that selects which video input stream must
propagate to this output. For example, for a 3-input switch:
3'b000 = no output
3'b001 = din_0
3'b010 = din_1
3'b100 = din_2
5 Dout1 Output Control As Dout0 Output Control but for output dout1.
... ... ...
15 Dout11 Output Control As Dout0 Output Control but for output dout11.
18-6
Video Switching Control Registers
UG-VIPSUITE
2015.05.04
Altera Corporation
Video Switching IP Cores
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