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mangOH Green (DV4) Developer's Guide
Audio (Analog and PCM)
The primary CF3 module's audio signals—analog and PCM (digital)—connect via an analog switch to
the mangOH Green's 3.5 mm analog audio jack as shown in
The audio interface configuration can be modified as described in
Table 2-3: Audio Interface Configuration Changes
Change type
Software
Hardware
Main CF3
Figure 2-6: Audio Configuration
Primary CF3 GPIOs
The mangOH Green connects a subset of the GPIOs defined in the CF3 specification, as shown in
Figure 2-7
•
Each GPIO signal passes through a debug connector.
By default, the debug connectors (CN601, CN602) are not installed. To use them, you must solder
on appropriate connectors. For location and details, see the mangOH Green schematics at
mangoh.io.
•
Twelve GPIOs connect to IoT slots (four for each slot)
•
One GPIO (GPIO2) is connected to the NINT (active low interrupt) output signal from a GPIO
expander (U906). To enable this signal a jumper must be placed on CN900.
Note: The mangOH Green uses GPIO expanders for additional I/O functions. See
Rev 2 Jun.16
Change effect
Mux1—Use default or
alternate configuration.
Mux1—Use default or
alternate configuration
Digital-Analog
PCM
Codec
Analog
on page 19 (it does not connect to any other GPIOs defined in the CF3 specification):
Figure 2-6
Method
API command
Set resistor on Mux1:
•
Low—Default
•
High—Alternate
Mux1
18
on page 18.
Table
2-3.
Change duration
Modifies running
configuration until device
reboots or another change is
made.
Selected configuration used
every time device boots up.
3.5mm
Jack
Note: Green arrows show default
hardware configuration
GPIO Expanders
on page 20.
4118903
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