STV9211 Datasheet, PDF (11/37 Pages) STMicroelectronics – 150 MHz PIXEL VIDEO CONTROLLER FOR MONITORS IN DC-COUPLING MODE

STV9211
Functional description
2.7 Brightness adjustment (8 bits)
Brightness adjustment is controlled by Register 2 (I²C table 1). It consists of adding the same DC
voltage (BRT) to the three RGB signals. This DC voltage can be adjusted between 0 and 2V, outside
the blanking pulse with 8mV adjustment steps (see Figure 7).
Inside the blanking pulse the DC output level is forced to the “Infra Black” level (V_ib).
Figure 7: Brightness adjustment
BLK
BRT max
BRT min
Insertion pulse: VIP (*)
2V
0.4V
V_ib
GND
(*) The Insertion pulse VIP is present only in “Brightness before Drive” mode
Black levels
InfraBlack level
Adjustment
Register
name / address
min / max
Value
Number step / resolution
Channel
Brightness
BRT / 02
0/2V
256 (8 bit) / 8mV
3 channels
simultaneously
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