Cf3 Gpios - mangOH Yellow Hardware Architecture Manual

mangOH Yellow Hardware Architecture Guide
The audio interface configuration can be modified as described in
Table 2-3: Audio Interface Configuration Changes
Change type
Switch audio I/O from
Software audio codec to IoT
connector (or switch back)
Select microphone type
Hardware
(digital/analog)
PCM_EXP_SEL
CF3 PCM
Figure 2-8: Audio Configuration

2.4.3 CF3 GPIOs

The mangOH Yellow supports several CF3 module GPIOs, as shown in
Note: The mangOH Yellow uses a GPIO expander for additional I/O functions. See
Rev 2 Oct.19
Change effect
Use the control signal
(PCM_EXP_SEL) to switch between
the audio I/O sources.
Populate/depopulate resistors:
•
Mux (U602)
Note: Default configuration — Solid lines
Alternate configuration — Dashed lines
Table
Method
Select 3.5mm jack or digital
microphone:
R713—(Default) Enables
·
Digital microphone
R714—Enables 3.5 mm jack
·
Digital-
(R714 – Analog Mic )
Analog
Codec
(U702)
(R713 – Digital Mic)
20
2-3.
Change duration
Until device reboots (non-
persistent)
Selected configuration used every
time device boots up.
IoT Connector #0
(CN601, slot IOT0)
3.5mm Jack
(CN701)
Digital Microphone
(U704)
Figure 2-9.
GPIO Expander on page 22.
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