IMP005 Breakout Datasheet by Murata Electronics

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imp005 Breakout
The imp005 breakoutboard provides basic life support for the imp005. The design includes
power supply and GPIO breakout for the module, as well as the FCC/IC-approved dual-band
(2.4/5GHz) antenna, an ethernet PHY and MagJack
, 32kHz crystal, and required QSPI flash.
To set up an imp005 Breakout Board, please see this page.
impOOS Breakom Board ‘ By Mr Mnx ,‘ “ electricimp
Click for larger version
Power can be supplied using a USB Mini-B cable from a USB Charger or a standard USB Port,
though the data lines are not connected to anything. Optionally, power can be provided through
the 5V0 pin on the board edge. The USB mini-B connector should not be used if power is
provided through the 5V0 pin.
imp005-breakout uses an LDO to provide 3.3v from the 5V0 input to both the imp005 and the
USB PHY, and can accept a maximum input voltage of 6.0v.
The 5.0v input is also directly routed to the USB host (type A) connector on the board, to supply
downstream USB peripherals being used with the board.
All of the usable I/O pins from imp005 are exposed on the 0.1-inch breakout. For descriptions of
header pin functions, please see the imp005 pin mux. UART0 is broken out on the left board
edge, and the pinout is compatible with an FTDI serial cable, allowing for easy connection when
using UART0 for offline debugging.
The on-board antenna is a dual-band design, and if re-used correctly — see ‘Designing Hardware
with the imp005’ — allows you to reference Murata’s FCC/IC modular approval for the type
1GC module. An on-board u.FL connector is also provided if you wish to use an alternate
antenna; to use this you need to remove R22 and stuff R23 to reroute the RF trace to the
Ethernet support is provided by the Microchip LAN8720A RMII PHY, coupled with a Stewart
Connector MagJack (RJ45 with integrated magnetics and LEDs) which provides the required
The imp005 breakout is pre-programmed with an impOS™ image in the 64Mbit SPI flash. This
OS connects to the Electric Imp Public impCloud™ if you wish to use the board with a Private
impCloud™ instance, you need to reprogram the SPI flash with the encrypted image provided by
Electric Imp technical support. To do this, fit a jumper linking J2.6 and J2.7 (this powers down
the imp005 and ensures the SPI bus is tristated), then use a SPI programmer to load the new
There are many different options for programming; we use the FTDI C232HM DDHSL-0 cable.
Next to J2 are color labels which identify which pin on the FTDI cable connects to which pin on
the board (Ye = yellow, Or = orange, Br = brown, Gr = green, Bl = black); only five of the ten
FTDI connections are used. Once connected and powered with the USB mini B input, use
flashrom to write the image:
$ flashrom -n -p ft2232_spi:type=232H,port=A,divisor=8 -c
"S25FL164K" -w image.rom
This process takes a couple of minutes. Once an image is loaded, the imp005 will securely
upgrade to the latest impOS release when it next connects to its impCloud.
MagJack is a registered mark ® of Bel Fuse Inc.

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