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UM1668
Jumper Description
JP14
JP15
JP4
JP5
JP13
Note:
The I2C address of WM8994ECS/R is 0b0011010.
2.7
USB OTG1 FS
The STM32439I-EVAL evaluation board supports USB OTG1 full speed communication via
a USB Micro-AB connector (CN14) and USB power switch (U9) connected to VBUS. The
evaluation board can be powered by this USB connection at 5 V DC with a 500 mA current
limitation.
Green LED LD7 will be lit in one of these cases:
•
Power switch (U9) is ON and the STM32439I-EVAL is acting as a USB host.
•
VBUS is powered by another USB host and the STM32439I-EVAL is acting as a USB
device.
Red LED LD8 will be lit when over-current occurs.
JP16 must be removed when using USB OTG FS as mentioned in
Table 6. Audio related jumpers
Data signal on digital microphone is connected to audio codec when JP14 is
set as shown to the right
(Default setting)
Data signal on digital microphone is connected to I2S port of STM32F439NIH6
when JP14 is set as shown to the right (also need to set JP5 according to this
table)
Clock signal on digital microphone is connected to audio codec when JP15 is
set as shown to the right
(Default setting)
Clock signal on digital microphone is connected to Timer output (PC7) of
STM32F439NIH6 when JP15 is set as shown to the right (also need to set
JP4 according to this table)
PB4 is as TDO/SWO signal when JP4 is set as shown to the right
(Default setting)
PB4 is connected to Timer input(PC6) of STM32F439NIH6 as I2S clock signal
when JP4 is set as shown to the right (also need to set JP15 according to this
table)
PD6 is as FMC_NWAIT signal when JP5 is set as shown to the right
(Default setting)
PD6 is connected to digital microphone as I2S data signal when JP5 is set as
shown to the right (also need to set JP14 according to this table):
Digital microphone power source is connected to +3.3V power when JP13 is
set as shown to the right
Digital microphone power source is connected to MICBIAS1 from
WM8994ECS/R when JP13 is set as shown to the right. MICBIAS1 setting is
requested by digital microphone connected to Codec.
(Default setting)
DocID025151 Rev 2
Hardware layout and configuration
Table
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