p87c770aar NXP Semiconductors, p87c770aar Datasheet - Page 40

• Manufacturer Part Number: p87c770aar
• Description: Microcontrollers Ntsc With On-screen Display Closed Caption
• Manufacturer: NXP Semiconductors

Philips Semiconductors
18.2.6
A Colour Look-up Table with 16 colours is provided. The colours are programmable from a palette of 4096 (4 bits per R,
G and B). The CLUT is defined by writing data to the RAM as described in Section 18.6.
Table 49 CLUT colour values
18.2.7
The polarity of the Fast Blanking signal (FBL) can be inverted. When inverted the values of the RGB outputs during line
fly-back periods are also inverted. The polarity is set using the FBPOL bit in the RGB Brightness Register (see
Section 18.9.8).
Table 50 RGB blanking interval values
Table 51 Fast Blanking signal polarity
18.2.8
A brightness control is provided that allows the RGB output voltages to be modified. The brightness is set using the
BRI0 to BRI3 bits in the RGB Brightness Register (see Section 18.9.8).
Table 52 RGB brightness selection
1999 Jun 11
BRI3
11
Microcontrollers for NTSC TVs with On-Screen
Display (OSD) and Closed Caption (CC)
0
1
0
1
FBOL
0
1
RED<3-0>
C
F
RGB B
10
0
1
AST
OLOUR
BRI2
0
1
FBPOL
B
LANKING POLARITY
RIGHTNESS
11
9
0
1
0
1
0
0
1
1
L
OOK
BRI1
0
1
-
RED<3-0>
10
UP
8
0
1
0
1
T
C
ABLE
BRI0
ONTROL
0
1
7
0
1
9
0
1
(CLUT)
GREEN<3-0>
6
0
1
8
0
1
5
0
1
7
0
1
GREEN<3-0>
FBL
4
0
1
6
0
1
1
0
0
1
40
3
0
1
5
0
1
BLUE<3-0>
2
0
1
4
0
1
RGB BRIGHTNESS
highest value
lowest value
1
0
1
3
0
1
BLUE<3-0>
0
0
1
2
0
1
1
0
1
Video display
Video display
CONDITION
RGB display
RGB display
P8xCx70 family
COLOUR VALUE
0
0
1
highest value
lowest value
Product specification
Inverted Fast
Blanking signal
Normal operation
CONDITIONS