Download GCX Graphics ClientX User`s Manual

Hardware Reference
3.2.4
IrDA Transceiver
Location on board: D1-D2
U1 is an IrDA transceiver that converts Serial 2 electrical signals to infrared light pulses for IrDA
communications. For volume production orders, U1 can be replaced with a socket (J23) for
cabling to an external transceiver. See section 4.5.2 for further details.
3.2.5
VR1: Vee Contrast Adjustment (factory option)
Location on board: A6
Vee is the contrast adjustment voltage required for most passive LCD displays. VR1 and a PWM
signal set the output voltage for Vee. See JP12 and section 4.8.2 for further details.
3.2.6
VR2: Vcon Contrast Adjustment (factory option)
Location on board: A5
Vcon is used to adjust the contrast for some passive LCD displays. See section 4.8.2 and Note 14
of section 6.4.4 for further details.
3.3
Jumper Settings
Jumpers on the GCX select a variety of operational modes. All use 2mm shorting blocks (shunts)
to select settings. Turn off power to the GCX before changing the position of a shunt.
The location indicated for each item refers to the grid diagram of the GCX in section 3.1.1
3.3.1
JP1: LCD Display Power
Type: 3-post header, 2mm
Location on board: A6
This jumper selects the supply voltage for the LCD display. The voltage selected here is passed to
the PNL_PWR pins on J14 (3.4.13) and J12 (3.4.11).
Jumper setting
Voltage Selected
1-2
Vddx (3.3 V)
2-3
Vcc (5.0 V)
WARNING! Make sure you have selected the correct voltage before connecting the panel. Flat
panels can be irreparably damaged by incorrect voltages.
IMPORTANT: This shunt is populated at the factory to match the voltage of the signal buffer
circuits populated on the board. While the buffers may perform adequately at a different voltage
than what was set at the factory, ADS cannot guarantee long-term performance.
ADS document # 110116-10012
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