saa5547ps NXP Semiconductors, saa5547ps Datasheet - Page 64
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
18.10 Redefinable characters
A number of Dynamically Redefinable Characters (DRCs)
are available. These are mapped onto the normal
character codes, and replace the predefined ROM value.
There are 32 DRCs, the first 16 occupy the character
codes 80H to 8FH, the second 16 occupy the locations
90H to 9FH. This allows for 32 DRCs or 16 Special DRCs.
2000 Feb 23
handbook, full pagewidth
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
address (HEX)
8BC0
8BDF
8BE0
8BFF
881F
883F
885F
8800
8820
8840
CHARACTER 30
CHARACTER 31
CHARACTER 0
CHARACTER 1
CHARACTER 2
Fig.30 Organisation of DRC RAM.
character code
80H
81H
82H
9EH
9FH
64
The remapping of the standard OSD to the DRCs is
activated when the TXT20.DRCS ENABLE bit is set.
The selection of Normal or Special OSD symbols is
defined by the TXT20.OSD PLANES.
Each character is stored in a matrix of 12
(V
matrices to be defined within a single location.
H
character 0
A
planes), this allows for all possible character
12 bits
MBK969
address (HEX)
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
Preliminary specification
SAA55xx
16
1
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