mangOH Yellow, Hardware Architecture Manual

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mangOH Yellow Hardware Architecture Guide
Rev 2 Oct.19 20 41113116
The audio interface configuration can be modified as described in Table 2-3 .
Figure 2-8: Audio Configuration
2.4.3 CF3 GPIOs
The mangOH Yellow supports several CF3 module GPIOs, as shown in Figure 2-9 .
Note: The mangOH Yellow uses a GPIO expander for additional I/O functions. See GPIO Expander on page 22 .
Table 2-3: Audio Interface Configuration Changes
Change type Change effect Method Change duration
Software
Switch audio I/O from
audio codec to IoT
connector (or switch back)
Use the control signal
(PCM_EXP_SEL) to switch between
the audio I/O sources.
Until device reboots (non-
persistent)
Hardware
Select microphone type
(digital/analog)
Populate/depopulate resistors:
•
Select 3.5mm jack or digital
microphone:
·
R713—(Default) Enables
Digital microphone
·
R714—Enables 3.5 mm jack
Selected configuration used every
time device boots up.
Note: Default configuration — Solid lines
Alternate configuration — Dashed lines
CF3 PCM
Digital-
Analog
Codec
(U702)
3.5mm Jack
(CN701)
IoT Connector #0
(CN601, slot IOT0)
(R714 – Analog Mic )
Digital Microphone
(U704)
(R713 – Digital Mic)
PCM_EXP_SEL
Mux (U602)