saa5647hl NXP Semiconductors, saa5647hl Datasheet - Page 76

• Manufacturer Part Number: saa5647hl
• Description: Saa56xx Enhanced Tv Microcontrollers With On-screen Display Osd
• Manufacturer: NXP Semiconductors

Philips Semiconductors
23.4.15 D
A number of DRCs are available (see Fig.31). These are
mapped onto the normal character codes, and replace the
predefined Character ROM value.
By default there are 32 DRCs occupying the character
codes 80H to 8FH. The SAA56xx family of devices offers
32 additional DRCs over the SAA55xx by setting TXT26.
The first 16 of them occupy the character codes A0 to AF,
the second 16 occupy the character codes C0 to CF.
2004 Sep 03
handbook, full pagewidth
Enhanced TV microcontrollers with
On-Screen Display (OSD)
The SAA56xx family of devices offers 32 additional DRCs over the SAA55xx by setting TXT26.7. The first 16 of them occupy character codes A0 to AF,
the second 16 occupy character codes C0 to CF.
YNAMICALLY
additional DRCs
for TXT26.7 = 1
R
EDEFINABLE
address (HEX)
8BDF
8BC0
8BE0
8BFF
8800
881F
8820
883F
8840
885F
C
HARACTERS
CHARACTER 30
CHARACTER 31
CHARACTER 32
CHARACTER 33
CHARACTER 46
CHARACTER 47
CHARACTER 48
CHARACTER 49
CHARACTER 62
CHARACTER 63
CHARACTER 0
CHARACTER 1
CHARACTER 2
Fig.31 Organisation of DRC RAM.
(DRC
character code
S
80H
81H
82H
9EH
9FH
A0H
A1H
AEH
AFH
C0H
C1H
CEH
CFH
)
76
The remapping of the standard OSD to the DRCs is
activated when the TXT20.DRCS ENABLE bit for single
page mode or for Page A in double window mode, and
TXT23.DRCS B ENABLE for Page B in double window
mode.
Each character is stored in a matrix of 12
(V
matrices to be defined within a single location.
H
planes), this allows for all possible character
character 0
12 bits
address (HEX)
GSA063
00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
0E
0F
Product specification
SAA56xx
16
1