Altera Video and Image Processing Suite Instrukcja Użytkownika Strona 100

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Address Register Description
1 Status
Bit 0 of this register is the Status bit.
This bit is asserted when the CVO IP core is producing
data.
Bit 1 of the Status register is unused.
Bit 2 is the underflow sticky bit.
When bit 2 is asserted, the output FIFO has
underflowed. The underflow sticky bit stays asserted
until a 1 is written to this bit.
Bit 3 is the frame locked bit.
When bit 3 is asserted, the CVO IP core has aligned its
start of frame to the incoming sof signal.
2 Interrupt Bits 2 and 1 are the interrupt status bits:
When bit 1 is asserted, the status update interrupt has
triggered.
When bit 2 is asserted, the locked interrupt has triggered.
The interrupts stay asserted until a 1 is written to these
bits.
3 Used Words The used words level of the output FIFO.
4 Video Mode Match One-hot register that indicates the video mode that is selected.
5 ModeX Control Video Mode 1 Control.
Bit 0 of this register is the Interlaced bit:
Set to 1 for interlaced. Set to 0 for progressive.
Bit 1 of this register is the sequential output control bit
(only if the Allow output of color planes in sequence
compile-time parameter is enabled).
Setting bit 1 to 1, enables sequential output from the
CVO IP core (NTSC). Setting bit 1 to a 0, enables
parallel output from the CVO IP core (1080p).
6 Mode1 Sample Count Video mode 1 sample count. Specifies the active picture width
of the field.
7 Mode1 F0 Line Count Video mode 1 field 0/progressive line count. Specifies the
active picture height of the field.
8 Mode1 F1 Line Count Video mode 1 field 1 line count (interlaced video only).
Specifies the active picture height of the field.
9 Mode1 Horizontal
Front Porch
Video mode 1 horizontal front porch. Specifies the length of
the horizontal front porch in samples.
UG-VIPSUITE
2015.05.04
Clocked Video Interface Control Registers
4-41
Clocked Video Interface IP Cores
Altera Corporation
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