saa5547ps NXP Semiconductors, saa5547ps Datasheet - Page 46

• Manufacturer Part Number: saa5547ps
• Description: Saa550x; Saa554x Tv Microcontrollers With Closed Captioning Cc And On-screen Display Osd
• Manufacturer: NXP Semiconductors

Philips Semiconductors
18.3.5
A CLUT (Colour Look-Up Table) with 16 colour entries is
provided. The colours are programmable out of a palette
of 4096 (4 bits per R, G and B). The CLUT is defined by
writing data to a RAM that resides in the MOVX address
space of the 80C51.
Table 11 CLUT colour values
18.3.6
CC: The foreground colour can be chosen from 8 colours
on a character-by-character basis. Two sets of 8 colours
are provided. A serial attribute switches between the
banks (see Table 16, Serial Mode 1, bit 7). The colours are
the CLUT entries 0 to 7 or 8 to 15.
TXT: The foreground colour is selected via a control
character (see Table 16). The colour control characters
take effect at the start of the next character (set-after) and
remain valid until the end of the row, or until modified by a
control character. Only 8 foreground colours are available.
The text foreground control characters map to the CLUT
entries is shown in Table 12.
Table 12 Foreground CLUT mapping
2000 Feb 23
(B11 TO B8)
RED<3:0>
TV microcontrollers with Closed Captioning (CC)
and On-Screen Display (OSD)
CONTROL
0000
0000
1111
1111
....
CODE
00H
01H
02H
03H
04H
05H
06H
07H
C
F
OREGROUND
OLOURS
>(B7 TO B4)
GREEN<3:0
0000
0000
1111
1111
....
C
DEFINED
COLOUR
magenta
OLOUR
yellow
green
black
white
cyan
blue
red
BLUE<3:0>
(B3 TO B0)
0000
1111
0000
1111
....
CLUT ENTRY
COLOUR
ENTRY
0
1
2
3
4
5
6
7
....
14
15
0
1
46
18.3.7
CC: This attribute is valid from the time set until end of row
or otherwise modified if set with Serial Mode 0. If set with
Serial Mode 1, then the colour is set from the next
character onwards.
The background colour can be chosen from all 16 CLUT
entries.
TXT: The control character ‘new background’ (1DH) is
used to change the background colour to the current
foreground colour. The selection is immediate (set at) and
remains valid until the end of the row or until otherwise
modified.
The Text background control characters map to the CLUT
entries as shown in Table 13.
Table 13 Background CLUT mapping
18.3.8
The attribute when set takes effect from the current
position until the end of the text display defined in the MMR
Text Area End.
CC: The background duration attribute (see Table 16,
Serial Mode 1, bit 8) in combination with the End Of Row
attribute (see Table 16, Serial Mode 1, bit 9) forces the
background colour to be displayed on the row until the end
of the text area is reached.
TXT: This attribute is not available.
00H + 1DH
01H + 1DH
02H + 1DH
03H + 1DH
04H + 1DH
05H + 1DH
06H + 1DH
07H + 1DH
CONTROL
CODE
B
B
ACKGROUND COLOUR
ACKGROUND DURATION
DEFINED
COLOUR
magenta
yellow
green
white
black
cyan
blue
red
Preliminary specification
CLUT ENTRY
SAA55xx
10
11
12
13
14
15
8
9