LPCXpresso Base Board rev B - User’s Guide
Page 34
Copyright 2011 © Embedded Artists AB
4.2.3
Light Sensor, ISL29003 – U13
U13 is always connected to the I2C-bus.There
is an interrupt output that can be connected to
GPIO_33 via J36 (schematic page 8). See
Figure 31 for details. Make sure there is no
other driver on the GPIO_33 signal when using
it as interrupt signal. There is a 270 ohm series
resistor to prevent damages in case there is
more than one driver of the signal.
Figure 31 – Jumper Setting: Light sensor, ISL29003
interrupt output
4.2.4
Accelerometer, MMA7455 – U14
U14 is always connected to the I2C-bus.There
are two interrupt outputs that can be
connected to GPIO_18 and GPIO_33 via J37
(schematic page 8). See Figure 32 for details.
Make sure there are no other drivers on the
GPIO_18 and GPIO_33 signals when using
them as interrupt signals. There are 270 ohm
series resistors to prevent damages in case
there is more than one driver of the signals.
Figure 32 – Jumper Setting: Accelerometer, MMC7455
interrupt outputs
