Functional description
FRDM-K32L3A6 Freedom Development Board, User’s Guide, Rev. B0, 09/2019
10
NXP Semiconductors
Figure 9 below shows the memory circuit:
Memory power supply is VDDIO1
Discrete pull-up resistors pads are provided for the SPI port
The memory uses a dedicated SPI port
The SPI Write Protect and Reset has a discrete pull-up resistor
Series zero ohm resistors are provided if it is desired to isolate the memory from the K32L3A6
device.
Figure 9. MX25R3235FZNIL0 32-Mbit (4 MB) serial flash memory circuit
3.6 Acceler Magnetometer Combo Sensor
Component U14 is NXP FXOS8700CQ sensor, a six-axis sensor with integrated linear accelerometer
and magnetometer with very low power consumption, and selectable I
2
C.
Figure 10
shows the sensor
circuit.
The sensor core is powered by the BRD_PER rail and the sensor IO is powered by the
BRD_IO_PER rail
o
This allows the sensor IO to be operated at a lower voltage than the sensor core supply
Discrete pull-up resistors for the I
2
C bus lines are provided
Default address is configured as 0x1E:
o
Address can be changed by pull-up/pull-down resistors on SA0 and SA1 lines
There are two interrupt signals routed
The I
2
C uses dedicated lines for the I2C interface and GPIO connections
Series zero ohm resistors and shorting links are provided if it is desired to isolate the sensor from
the K32L3A6 device.
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