TDA4886 Datasheet, PDF (24/52 Pages) NXP Semiconductors – 140 MHz video controller with I2C-bus

Philips Semiconductors
140 MHz video controller with I²C-bus
handbook, full pagewidth
4.2
colour signal
amplitude
related to
nominal colour
signal amplitude
(dB)
0
Product specification
TDA4886
MHB191
(1)
(2)
(3)
−28
00H
10H
20H
26H
30H
3FH
contrast control data byte
(1) No contrast reduction by subcontrast.
(2) Partial contrast reduction by subcontrast.
(3) Full contrast reduction by subcontrast.
Fig.8 Contrast control characteristic with subcontrast (equal to contrast modulation and limiting).
handbook, full pagewidth
160
OSD signal
amplitude
related to
125
nominal colour
signal amplitude
(%)
100
maximum colour signal amplitude
maximum OSD signal amplitude
nominal colour signal amplitude
(1)
MHA351
(2)
30
00H
(3)
0FH
OSD contrast control data byte
(1) No OSD contrast reduction by subcontrast.
(2) Partial OSD contrast reduction by subcontrast.
(3) Full OSD contrast reduction by subcontrast.
Fig.9 OSD contrast control characteristic with subcontrast (equal to contrast modulation and limiting).
1998 Nov 11
24