Hardware Layout and configuration
UM1935
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DocID028194 Rev 1
The analog microphone on the headset is connected to ADC of WM8994ECS/R through
audio jack CN27. External speakers can be connected to WM8994ECS/R via audio jack
CN26.
Two digital microphones (MEMS microphone) MP34DT01TR are on STM32479I-EVAL
evaluation board. They are able to be connected to either audio codec or I
2
S port of
STM32F479NIH6, by setting
jumpers shown in
Table 6: Audio related jumpers
. The coupon
connectors CN25 and CN28 can be used to support MEMS microphone evaluation board
STEVAL-MKI129V1 after removing SB25 and SB26.
Table 6. Audio related jumpers
Jumper
Description
JP17
Data signal on digital microphones is connected to audio codec when JP17 is set as
shown to the right (Default setting)
Data signal on digital microphones is connected to I
2
S port of STM32F479NIH6
when JP17 is set as shown to the right (Also need to set JP6 according to this table):
JP18
Clock signal on digital microphones is connected to audio codec when JP18 is set
as shown to the right (Default setting)
Clock signal on digital microphones is connected to timer output (PC7) of
STM32F479NIH6 used to divide by two I
2
S clock when JP18 is set as shown to the
right (it is also needed to set JP5 according to this table)
JP5
PB3 is as TDO/SWO signal when JP5 is set as shown to the right (Default setting):
PB3 (I
2
S Clock) is connected to Timer input PC6 used as microphone clock divider
when JP5 is set as shown to the right (it is also needed to set JP18 according to this
table):
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