TDA935x Philips, TDA935x Datasheet - Page 55

• Manufacturer Part Number: TDA935x
• Description: TV Signal Processor-Teletext Decoder with Embedded u-Controller
• Manufacturer: Philips

Philips Semiconductors
RGB Brightness Control
A brightness control is provided to allow the RGB upper
output voltage level to be modified. The RGB amplitude
may be varied between 60% and 100%.
The brightness is set in the RGB Brightness register as
follows: -
Table 26 RGB Brightness
Contrast Reduction
TXT: The COR bits in SFRs TXT5 & TXT6 control when
the COR output of the device is activated (i.e. Pulled-low).
Table 27 MMR Memory Map
2001 Jan 18
ADD R/W
87FD
87FC
87FE
87FF
87F0
87F1
87F2
87F3
87F4
87F5
87F6
87F7
87F8
87F8
TV signal processor-Teletext decoder with
embedded -Controller
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
W
R
RGB Bright.ness
Status read
Status write
H-Sync. Delay
V-Sync. Delay
Top Scroll Line
Configuration
0 0 0 0
1 1 1 1
BRI3-0
Display Control
Text
Vertical
Text Area Start
Fringing Control
Text Area End
Scroll Area
Scroll Range
...
Names
Position
RGB Brightness
Lowest value
...
Highest value
VDSPOL
HOP<1>
SRC<3>
FRC<3>
SSH<3>
SPS<3>
BIT7
VPOL
BUSY
CC
-
-
-
-
-
VDEL<2>
HOP<0>
HSD<6>
VSD<6>
SRC<2>
FRC<2>
SSH<2>
SPS<2>
BIT6
FIELD
HPOL
-
-
-
-
VDEL<1>
SRC<1>
VOL<5>
FRC<1>
HSD<5>
VSD<5>
TAS<5>
TAE<5>
SSH<1>
SPS<1>
BIT5
SCON
SCON
-
-
55
This output is intended to act on the TV’s display circuits to
reduce contrast of the video when it is active. The result of
contrast reduction is to improve the readability of the text
in a mixed teletext and video display.
The bits in the TXT5 & TXT6 SFRs allow the display to be
set up so that, for example, the areas inside teletext boxes
will be contrast reduced when a subtitle is being displayed
but that the rest of the screen will be displayed as normal
video.
CC: This feature is not available in CC mode.
Memory Mapped Registers
The memory mapped registers are used to control the
display. The registers are mapped into the Microcontroller
MOVX address space, starting at address 87F0h and
extending to 87FF.
MMR M
VDEL<0>
VOL<4>
HSD<4>
VSD<4>
SRC<0>
FRC<0>
TAE<4>
SSH<0>
TAS<4>
SPS<0>
BIT4
FLR
FLR
-
-
AP
TDA935X/6X/8X PS/N2 series
SCL<3>
VOL<3>
HSD<3>
VSD<3>
TAS<3>
TAE<3>
SCR<3>
SCR<3>
SSP<3>
STS<3>
BRI<3>
BIT3
TXT/V
FRDN
-
SCL<2>
VOL<2>
HSD<3>
VSD<2>
TAE<2>
SCR<2>
SCR<2>
TAS<2>
STS<2>
SSP<2>
BRI<2>
BIT2
Tentative Device Specification
FRDE
MSH
-
SCL<1>
MOD<1>
VOL<1>
HSD<1>
VSD<1>
TAS<1>
TAE<1>
SCR<1>
SCR<1>
SSP<1>
STS<1>
BRI<1>
BIT1
FRDS
-
SCL<0>
MOD<0>
VOL<0>
SCR<0>
SCR<0>
HSD<0>
VSD<0>
TAS<0>
TAE<0>
SSP<0>
STS<0>
BRI<0>
BIT0
FRDW
-