SAA7105E/V1/G NXP Semiconductors, SAA7105E/V1/G Datasheet - Page 17

• 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
to insert certain values in the outgoing data stream at specified times. It can also be used
to generate digital signals associated with time events. These can be used as digital
horizontal and vertical synchronization signals on pins HSM_CSYNC and VSM.
The picture position is adjustable through the programmable relationship between the
sync pulses and the video contents.
The generation of embedded analog sync pulses is bound to a number of events which
can be defined for a line. Several of these line timing definitions can exist in parallel. For
the final sync raster composition a certain sequence of lines with different sync event
properties has to be defined. The sequence specifies a series of line types and the
number of occurrences of this specific line type. Once the sequence has been completed,
it restarts from the beginning. All pulse shapes are filtered internally in order to avoid
ringing after analog post filters.
The sequence of the generated pulse stream must fit precisely to the incoming data
stream in terms of the total number of pixels per line and lines per frame.
The sync engines flexibility is achieved by using a sequence of linked lists carrying the
properties for the image, the lines as well as fractions of lines.
context between the various tables.
The first table serves as an array to hold the correct sequence of lines that compose the
synchronization raster; it can contain up to 16 entries. Each entry holds a 4-bit index to
the next table and a 10-bit counter value which specifies how often this particular line is
invoked. If the necessary line count for a particular line exceeds the 10 bits, it has to use
two table entries.
Fig 3. Context between the pattern generator tables for DH sync pulses
line type pointer
VALUE ARRAY
8 entries
8
2-bit value
4-bit line type index
Rev. 02 — 23 December 2005
4-bit value index
10-bit duration
3
3
LINE COUNT ARRAY
16 entries
LINE TYPE ARRAY
15 entries
3
3
10-bit line count
3
3
event type pointer
LINE PATTERN ARRAY
7 entries
3
3
SAA7104E; SAA7105E
4-bit value index
10-bit duration
3
3
3
3
line pattern pointer
3
3
3
3
4-bit value index
10-bit duration
pointer
count
line
pattern pointer
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Figure 3
Digital video encoder
4-bit value index
10-bit duration
illustrates the
mhc573
17 of 78