Linear Technology DC2026A Demo Manual page 10

DEMO MANUAL DC2026A
Quick start GuiDe
Going Further
After completing the procedure in this Quick Start Guide,
all of the tools are in place to move on to other products
or further experimentation with the DC934. The main page
for all Linduino resources is:
http://www.linear.com/designtools/linduino.php
HTML documentation for the code is provided in the
sketchbook in the Documentation subdirectory.
External Connections
J1: QuikEval header – Connection to QuikEval demonstra-
tion board. This connector provides 5V at 50mA, 7.6V at
2
50mA, SPI and I C interfaces, and an auxiliary I
for identification of the attached demonstration board.
J2: AC ADAPTOR IN – 2.1mm × 5.5mm barrel connector.
Optional DC power input, 7V to 20V DC. With external
power applied, up to 750mA can be drawn from the 5V
supply (available on pins 2 and 5 on J3, or pin 10 on J1.)
J3, J6, J7, J8: Arduino shield headers. These headers are
compatible with standard Arduino "shield" add-on boards.
Refer to schematic for individual signals.
J4: ICSP – In-circuit serial programming header. Used in
conjunction with an external programming tool such as
an AVR Dragon or JTAGICE3.
J5: USB – Connection to the host computer. Power for the
Linduino and the connected daughter board is also taken
from J5 if no external power is supplied to J2.
10
Jumpers
JP1: Factory use only.
JP2: Reset configuration, not installed. When the ICSP
header is used with an external tool, install a 3 position,
0.1" header in this location and cut the trace labeled NORM
on the back side of the board. Place jumper in the right-
hand position (opposite to NORM) to allow the ICSP tool
to control the RESET signal, install in the NORM position
to allow the FT232 DTR signal to control RESET (this is
normal Arduino operation, and required to program the
board from within the Arduino IDE.)
LEDs
2
C interface
ON: Lights when 5V supply is on, from which all other
supply voltages are generated.
SCK: Lights when Arduino pin 13 (SCK on the SPI bus)
is high. This is the pin used in the "blink" sketch under
File → Examples → Basics → Blink.
RX: Lights when data is being received from the host
computer through the USB port.
TX: Lights when data is being sent to the host computer
through the USB port.
RESET Button (S1): Asserts the ATMega328's RESET line,
restarting program execution.
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