Bitsy G5 User Manual
10
110121-4001A
3 Hardware Reference
This section gives an overview of the hardware features of the Bitsy G5. The overview includes a
description of the switches, jumper settings, connectors, and connector pinouts.
Many connectors and headers have a visible number or marking on the board that indicates pin 1.
As seen from the component side, double-row headers on the board are
numbered as shown in the figure to the right.
If that pin is not clearly marked, there are two ways to locate pin 1:
1.
For through-hole connectors, look at the underside of the board. The square pad is pin 1.
2.
For surface-mount connectors, look for numbers silk screened on the component side of the
Bitsy G5. The "component side" of the Bitsy G5 is the one on which the PCMCIA ejector is
installed.
3.1
Switches, Controls and Indicators
3.1.1
S1: DIP Switch
S1 is a two-position DIP switch located on the edge of the board at the opening of the PCMCIA
socket. When in the "ON" position, switches are closed and connect to ground. Otherwise, they
are pulled up.
DIP switch positions "1" and "2" connect to the i.MX31. Most operating systems on the Bitsy G5
reserve these switches for their use. Consult the operating system manual for details.
3.1.2
D9: Green LED Indicator
The Bitsy G5 has one onboard green light-emitting diode (LED), located on the corner of the
board next to JP2, that is controlled by the processor. The LED is driven by the same buffers as
the display driver data lines. The LED will be off when the display buffers are disabled.
3.2
Jumper Settings
There is one user-selectable jumper on the Bitsy G5. It uses a 2 mm shorting block (shunt) to
select the setting. Turn off power to the Bitsy G5 before changing the position of a shunt.
3.2.1
JP2: LCD Display Power Select
Type: 3-post header, 2 mm
This jumper selects the supply voltage for the LCD display. The three-pin header is located near
the PCMCIA ejector button.
Jumper Setting
Voltage Selected
1-2
Vcc (5.0 V)
2-3
Vddx (3.3 V)
WARNING! The pin out of JP2 on the Bitsy G5 is not the same as the pin out for the BitsyXb.
Make sure you have selected the correct voltage before connecting the panel. Flat panels can be
irreparably damaged by incorrect voltages.
2 4 6 8...
1 3 5 7...
