5. Backlight and AREF header
If you want to be able to turn your LCD’s backlight off or use an external voltage reference source, you
may want to solder a 1×2 header on to this location.
6. LCD connector
The pins in the LCD connector area are arranged so that the AVR can control an LCD using the
standard 4-bit HD44780 protocol and optionally power an LCD backlight. On the assembled (non-kit)
version of the Orangutan SVP, we solder a 2×8 shrouded header in to the 16 pins highlighted in the
diagram. Then the
16×2 character LCD with backlight
[https://www.pololu.com/product/772]
(included
with the assembled version, but not the kit version) plugs in to the lower 7 rows of the connector,
as well as the A and K lines on the other side of the board. If you have a different kind of LCD,
consult its datasheet and the
Orangutan SVP Reference Diagram
[https://www.pololu.com/file/0J244/
orangutan_svp_reference_diagram.pdf]
(82k pdf) to determine the correct way to connect it.
7. User pushbuttons
The three user pushbuttons can be soldered in at this location.
8. Buzzer
The buzzer can be soldered in at this location.
9. Reset buttons.
A reset pushbutton can be soldered in at this location.
10. SPI/Programming connector
The assembled version comes with a 2×3 shrouded box header soldered in to this location (with
the notch pointing away from the USB connector). This allows you to use an external AVR ISP
programmer to program the AVR if you don’t want to use the integrated programmer for whatever
reason. It also provides access to the AVR’s SPI pins, so you could use this location to connect an SPI
device to your Orangutan. A 2×3 female header is provided for this location.
11. VCC-VUSB jumper
To power the board from USB, install a 1×2 male header at this location and use a blue shorting block
to connect VUSB to VCC. See
Section 11
for more information and caveats about using this jumper.
12. Auxiliary processor I/O block
This block contains the auxiliary processor’s A, B, C, D/RX, and TX lines, as well as several
connections to GND and VCC. You can solder in either the 3×7 male or 3×7 female headers here, or
mix and match genders using the other provided headers.
Pololu Orangutan SVP User’s Guide
© 2001–2019 Pololu Corporation
5. Getting Started
Page 25 of 43
