D01-501152-01 Rev A
SXGA096 Design Reference Board User
’
s Manual
10
the default settings programmed into the microcontroller. After initialization the
microcontroller scans for user input and monitors the OLED.
I
2
C bus
The microcontroller is the bus master and communication occurs at the standard
100 KHz clock rate. The maximum speed allowed for I
2
C bus communication is
400 KHz. Please refer to the Philips I
2
C bus specification available on the Philips
website for detailed information.
Voltages
The power supply section of the SXGA096 Design Reference Board consists of
several voltage regulators, some of which are adjustable with potentiometers.
Table 6-1 below describes the voltages and their purpose.
Voltage
Range
Typical
Purpose
Vinput
(USB)
+5.0 Volts
+5Volts
Main Supply
V5
5Volts ±10% (fixed)
5 Volts
LEDS, DAC
V3.3
3.3Volts ±10% (fixed)
3.3 Volts
DVI, RS232
V2.5
2.5Volts ±10% (fixed)
2.5 Volts
VAN
5.0V
5.0 Volts
OLED Anode
VPG
-1.8V
-1.8V
OLED Bias
VDD
1.8V ±10% (fixed)
1.8V
OLED
Table 6-1 shows the board’s various power supplies and their purposes
Bias Control
BIASN: Normal board – BIASN=3 gives the best results.
VCOM Mode
VCOMMODE:
Dimming: use register VCOM to set brightness level in Manual mode.
Gamma
