NXP Semiconductors
UM11079
IoT Module base board
UM11079_OM40006.docm
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User manual
Rev. 1.0
— March 20, 2018
18 of 23
The line input to the codec is routed to a 3.5mm stereo jack socket (J5) through the
circuit shown in Fig 5.
Fig 5.
Line input circuitry
A second 3.5mm stereo jack socket (J6) provides a headphone / line out from the codec,
via the circuit shown in Fig 6.
Fig 6.
Headphone / line output circuitry
The MCUXpresso SDK includes drivers and example code for the audio codec (if
supported by the Module used.)
8.3 SD card
The micro SD card (J3) includes in the OM40006 board provides a 4-bit SDIO interface
to support memory cards and other compatible modules. Power enable to the socket is
provided via P5 pin 83 (PIO2-5), with LED D1 providing a visual indication when power is
applied.
8.4 Accelerometer
The board includes an NXP MMA8652FCR1 accelerometer, interfaced to P5 pins 75 and
77 (P3_24 and P3_23), which is the same port as the touch screen controller, audio
codec, Arduino and PMod expansion connectors use. The accelerometer has an I
2
C
address of 0b0011101. The reset for this device is sourced from P6 pin 30 (P2_27) and
the interrupt is routed to P6 pin 32 (P4_0.)
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