PNX1301EH NXP Semiconductors, PNX1301EH Datasheet - Page 119

• Manufacturer Part Number: PNX1301EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1301EH

• Lead Free Status / RoHS Status: Not Compliant

Philips Semiconductors
Figure 7-18. Message-passing START and END signals.
the first byte of the first line just after the VO_IO2 active
signal.
7.11
In data-streaming and message-passing modes, the
EVO supplies a stream of 8-bit data. No data selection or
data interpretation is done, and data is transferred at the
rate of one byte per VO_CLK. Data is clocked out on the
positive edge of VO_CLK.
When
EVO_ENABLE = 1 and SYNC_STREAMING = 1, the
VO_IO2 signal indicates a data-valid condition. This sig-
nal is asserted when the EVO starts outputting valid data
(that is, data-streaming mode is enabled and video out is
running), and is de-asserted when data-streaming mode
is disabled. As shown in
nal on VO_IO2 is asserted just before the first valid byte
is present on VO_DATA[7:0], and is de-asserted just af-
ter the last valid byte was sent, or if an HBE error is sig-
naled. All transitions of VO_IO2 occur on the rising edge
of VO_CLK. The VO_IO1 signal generates a pulse one
VO_CLK cycle before the first valid data is sent. The
Figure 7-17. Data-streaming valid data signals.
Figure 7-16. Genlock mode.
VO_DATA[7:0]
Image Data
VO_DATA[7:0]
VO_CLK
DATA TRANSFER TIMING
VO_IO1
VO_IO2
data-streaming
VO_CLK
VO_IO2
VO_IO1
VO_IO2
Line 525/625
message
Delay SLAVE_DLY in VO_CLK cycles
Start of
XX
Figure
mode
XX
7-17, the data-valid sig-
D0
EAV
XX
Line 1
is
D1
enabled
D0
D2
D1
Line 2
and
One Frame
D3
DATA_VALID
D2
transitions of VO_IO1 occur on the rising edge of
VO_CLK and last for one VO_CLK cycle.
In message-passing mode, the EVO issues signals on
VO_IO1 and VO_IO2 to indicate the start and end of
messages.
When message passing is started by setting VO_CTL.
VO_ENABLE, the EVO sends a Start condition on
VO_IO1. When the EVO has transferred the contents of
the buffer, it sends an End condition on VO_IO2, sets
BFR1_EMPTY, and interrupts the DSPCPU. The EVO
stops, and no further operation takes place until the
DSPCPU sets VO_ENABLE again to start another mes-
sage, or until the DSCPU initiates other EVO operation.
The timing for these signals is shown in
7.12
7.12.1
The EVO accepts memory-resident video image data in
three formats: YUV 4:2:2 co-sited, YUV 4:2:2 inter-
spersed, and YUV 4:2:0. These formats are shown in
Figure 7-19
PRELIMINARY SPECIFICATION
D4
Line counter loaded by FRAME_PRESET
Line FRAME_PRESET
EAV
D3
IMAGE DATA MEMORY FORMATS
D5
Video Image Formats
through
D4
D6
Figure
D5
Line 525/625
message
End of
D7
7-21.
Dk
Enhanced Video Out
XX
EAV
Line 1
XX
Figure
XX
XX
7-18.
7-9