Datasheet

LMH0030

SNLS219G –JANUARY 2006–REVISED APRIL 2013

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PROCESSING NON-SUPPORTED AND pSf RASTER FORMATS

The number and type of HD raster formats has proliferated greatly since the LMH0030 was designed. Though

not specifically capable of fully or automatically processing these new formats, the LMH0030 may still be capable

of serializing them. The user is encouraged to experiment with processing of these formats keeping in mind that

the LMH0030 has not been tested to handle raster formats other than those detailed in Table 4. Therefore, the

results from attempts to process non-supported formats is not ensured. The following guidelines concerning

device setup are provided to aid the user in configuring the LMH0030 to attempt limited processing of these other

raster formats. In general, the device is configured to defeat its format and TRS detection function and to limit

operation to a generic HD format type. (The user should consult Table 4 for guidance on the format groups

similar to the non-supported one to be processed). Since these newer formats are in the HD realm, the LMH0030

should be configured to operate in HD-ONLY mode by setting bit-5 of the FORMAT 0 register (address 0Bh).

Also, the device should be further configured by loading the FORMAT SET[4:0] bits of this register with a non-

specific HD sub-format code. The complete data word for this HD sub-format code with HD-ONLY bit set is 33Fh

(all 10 bits of AD[9:0]). Since this format differs from those in the table, the EAV/SAV indicators are disabled.

Without these indicators, line numbering and CRC insertion are disabled and ancillary data insertion will not

function. Pre-processing of the parallel data ahead of the LMH0030 will be required to insert CRC data and line

numbering.

Among the specialized formats are so-called progressive-segmented frame formats (pSf). Refer to SMPTE

274M-2003, Annex A. These formats are composed of the video lines of progressive scan rasters rearranged in

the manner of an interlaced raster. The even numbered lines are arranged to form Field 1 and the odd numbered

lines form Field 2. In other respects, the format is identical to the normal interlaced format. The LMH0030 can

serialize these pSf formats provided that the lines of the original progressive raster are first rearranged externally

to the LMH0030 before being presented to it for processing.

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