SAA7105E/V1/G NXP Semiconductors, SAA7105E/V1/G Datasheet - Page 18

• Manufacturer Part Number: SAA7105E/V1/G
• Description: Video ICs PC-DENC
• Manufacturer: NXP Semiconductors

Specifications of SAA7105E/V1/G

• Adc/dac Resolution: 10b
• Screening Level: Commercial
• Package Type: LBGA
• Pin Count: 156
• Lead Free Status / RoHS Status: Compliant
• Other names: SAA7105E/V1/G,557

Philips Semiconductors
SAA7104E_SAA7105E_2
Product data sheet
The 4-bit index in the line count array points to the line type array. It holds up to 15 entries
(index 0 is not used), index 1 points to the first entry, index 2 to the second entry of the line
type array etc.
Each entry of the line type array can hold up to 8 index pointers to another table. These
indices point to portions of a line pulse pattern: A line could be split up e.g. into a sync,
a blank, and an active portion followed by another blank portion, occupying four entries in
one table line.
Each index of this table points to a particular line of the next table in the linked list. This
table is called the line pattern array and each of the up to seven entries stores up to four
pairs of a duration in pixel clock cycles and an index to a value table. The table entries are
used to define portions of a line representing a certain value for a certain number of clock
cycles.
The value specified in this table is actually another 3-bit index into a value array which can
hold up to eight 8-bit values. If bit 4 (MSB) of the index is logic 1, the value is inserted into
the G or Y signal, only; if bit 4 = 0, the associated value is inserted into all three signals.
Two additional bits of the entries in the value array (LSBs of the second byte) determine if
the associated events appear as a digital pulse on the HSM_CSYNC and/or VSM outputs.
To ease the trigger set-up for the sync generation module, a set of registers is provided to
set up the screen raster which is defined as width and height. A trigger position can be
specified as an x, y co-ordinate within the overall dimensions of the screen raster. If the
x, y counter matches the specified co-ordinates, a trigger pulse is generated which
pre-loads the tables with their initial values.
The listing in
raster.
Important note:
Due to a problem in the programming interface, writing to the line pattern array
(address D2) might destroy the data of the line type array (address D1). A work around is
to write the line pattern array data before writing the line type array. Reading of the arrays
is possible but all address pointers must be initialized before the next write operation.
Table 9
Rev. 02 — 23 December 2005
outlines an example on how to set up the sync tables for a 1080i HD
SAA7104E; SAA7105E
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Digital video encoder
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