saa5547ps NXP Semiconductors, saa5547ps Datasheet - Page 62
saa5547ps
Manufacturer Part Number
saa5547ps
Description
Saa550x; Saa554x Tv Microcontrollers With Closed Captioning Cc And On-screen Display Osd
Manufacturer
NXP Semiconductors
Datasheet
1.SAA5547PS.pdf
(84 pages)
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Philips Semiconductors
18.9
Three ROMs are used to generate the correct pixel information. The first contains the National option look-up table, the
second contains the Basic character look-up table and the third contains the Character pixel information.
Although these are individual ROMs, since they do not need to be accessed simultaneously they are all combined into
a single ROM unit.
2000 Feb 23
handbook, full pagewidth
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
ROM addressing
BASIC + NATIONAL OPTION
CHARACTER PIXEL DATA
430 TEXT
2048 LOCATIONS
(71680
LOOK-UP
710 TEXT
OR
12-BIT)
176 CC
Fig.28 ROM organisation.
2400H
0800H
0000H
62
LOOK-UP SET 3
LOOK-UP SET 2
LOOK-UP SET 1
LOOK-UP SET 0
MBK978
0800H
0600H
0400H
0200H
0000H
Preliminary specification
SAA55xx
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