PNX17XX Datasheet, PDF (449/832 Pages) NXP Semiconductors – Connected Media Processor

Philips Semiconductors
Volume 1 of 1
PNX17xx Series
Chapter 12: Video Input Processor
Raw Data Capture
Raw data capture overrides ANC or AUX data capture modes when enabled. In this
raw capture mode, any validated data at the video port is captured regardless of
external or embedded synchronization signals.
AUX Data Write to Memory
Auxiliary data capture formats, for writing into the frame buffer, are limited to raw luma
and chroma samples in 8 or 10 bit formats (extended to 16 bit). Optionally, writing of
chroma samples can be omitted.
Capture Enable Mode
The aux_cfen bits specify the fields from which the device is to capture the AUX data. If
cfen=0, no auxiliary data is captured. Once the capture of an auxiliary window has
started, resetting these bits has no effect until the end of the video window.
The aux_anc bits specify the type of ancillary data blocks to be fetched. Once the
capture of an ANC block has started, resetting of these bits has no effect until the end
of the data block.
The aux_raw bit enables continuous capturing of raw samples regardless of external or
internal syncs. If raw capture is enabled, aux_cfen and aux_anc bit settings are ignored.
The aux_bsize value specifies, in number of bytes, the size of the buffer available for
AUX data.
The aux_pitch bits specify the AUX line pitch, i.e., the difference in the address from a
pixel on a line to the same pixel on the next line, when pitch mode is enabled. Pitch
mode is also defined for the ANC data capture, where each packet is treated as a
new video line.
The aux_osm bit can be used to automatically limit capture by stopping after any wrap
condition is reached. End of AUX window wrap condition also applies to ANC
capture, even if AUX capture is disabled.
The data buffered in the local FIFOs is flushed when a wrap condition is reached or in
pitch mode at the end of each video line or ANC packed. For the raw mode, the data
is also flushed when disabling raw capture.
Address Generation
The AUX DMA base address register provides 28 bits to specify a destination
address for storing the AUX data in the frame buffer. The address generation is
similar to that of video capture, except for the missing double-buffer and field modes.
The relationship between the input data formats and the different video and auxiliary
data capture scenarios is shown in Table 8. It is important to note, however, that the
current VIP design does not support mixing of AUX and ANC data.
PNX17XX_SER_1
Preliminary data sheet
Rev. 1 — 17 March 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
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