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LMH0030

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SNLS219G –JANUARY 2006–REVISED APRIL 2013

The available formats and codes are detailed in Table 4. Generally speaking, the Format Set[4:0] codes indicate

or group the formats as follows: Format Set[4] is set for the HD formats and reset for the SD formats. Format

Set[3] when set indicates that PAL data is being processed. When reset NTSC data is being processed. Format

Set[2:0] correspond to one of the sub-standards given in the table. Note that the LMH0030 makes no distinction

in formats resulting from the processing of data at 74.25MHz or 74.176MHz.

The HD Only bit when set to a logic-1 locks the LMH0030 into the high definition data range and frequency. In

systems designed to handle only high definition signals, enabling HD Only reduces the time required for the

LMH0030 to establish frequency lock and determine the HD format being processed.

The SD Only bit when set to a logic-1 locks the LMH0030 into the standard definition data ranges and

frequencies. In systems designed to handle only standard definition signals, enabling SD Only reduces the time

required for the LMH0030 to establish frequency lock and determine the format being processed. When SD Only

and HD Only are set to logic-0, the device operates in SD/HD mode.

Table 4. Video Raster Format Parameters

Format

Frame Active

Code Format Specification Lines Active Lines Samples

Rate Samples

[4,3,2,1,0]

00001 SDTV, 54 SMPTE 344M 60I 525 507/487 3432 2880

00010 SDTV, 36 SMPTE 267M 60I 525 507/487 2288 1920

00011 SDTV, 27 SMPTE 125M 60I 525 507/487 1716 1440

01001 SDTV, 54 ITU-R BT 601.5 50I 625 577 3456 2880

01010 SDTV, 36 ITU-R BT 601.5 50I 625 577 2304 1920

01011 SDTV, 27 ITU-R BT 601.5 50I 625 577 1728 1440

10001 HDTV, 74.25 SMPTE 260M 30I 1125 1035 2200 1920

10010 HDTV, 74.25 SMPTE 274M 30I 1125 1080 2200 1920

10011 HDTV, 74.25 SMPTE 274M 30P 1125 1080 2200 1920

11001 HDTV, 74.25 SMPTE 274M 25I 1125 1080 2640 1920

11010 HDTV, 74.25 SMPTE 274M 25P 1125 1080 2640 1920

11100 HDTV, 74.25 SMPTE 295M 25I 1250 1080 2376 1920

11101 HDTV, 74.25 SMPTE 274M 24P 1125 1080 2750 1920

10100 HDTV, 74.25 SMPTE 296M 60P 750 720 1650 1280

FORMAT REGISTER 1 (Address 0Ch)

The LMH0030 can automatically determine the format of the incoming parallel data. The result of this operation is

stored in the FORMAT 1 register. The Format[4:0] bits identify which of the many possible video data standards

that the LMH0030 can process is being received. These format codes follow the same arrangement as for the

Format Set[4:0] bits. These formats and codes are given in Table 4. Bit Format[4] when set indicates that HD

data is being processed. When reset, SD data is indicated. Format[3] when set indicates that PAL data is being

processed. When reset NTSC data is being processed. Format[2:0] correspond with one of the sub-standards

given in the table.

The H, V, and F bits register correspond to input TRS data bits 6, 7 and 8, respectively. The meaning and

function of this data is the same for both standard definition (SMPTE 125M) and high definition (SMPTE 292M

luminance and color difference) video data. Polarity is logic-1 equals HIGH-true. These bits are registered for the

duration of the applicable field.

TEST 0 REGISTER (Address 0Dh)

The Test Pattern Select bits determine which test pattern is output when the Test Pattern Generator (TPG)

mode or the Built-in Self-Test (BIST) mode is enabled. Table 5 gives the codes corresponding to the various test

patterns. All HD color bars test patterns are BIST data. Standard Definition BIST test patterns are: NTSC,

27MHz, 4x3 color Bars and PAL, 27MHz, 4x3 PLL Pathological.

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