CPU-1440 Dev Kit user manual
Issue A
14
GPIO
Four digital inputs and outputs are provided with +5V and GND on a 2x5 way connector
with push-in spring cage connections on the CPU-1440 breakout board.
Input and output levels are indicated by 2 banks of 4 leds on the CPU1440 breakout
board. The leds are on with a low logic level and off with a high logic level.
The digital inputs logic level can be set without external wiring by fitting the
corresponding jumper to the digital input selection header. If these inputs are controlled
by external hardware the jumper must not be fitted to the header. Fitting a jumper sets
the logic level low (LED ON).
Power requirements
The CPU-1440 board operates from +5V (+/-5%) power input. All other supply rails are
generated on-board.
An external coin cell battery input is available on the breakout board.
The power consumption of the CPU-1440 board is 3W typical.
