ESPRESSObin V7-Quick Start Guide page: 16 / 18
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I. USB2.0 selection
The PCIe connector J9 and USB type A connector J8 share the same USB2.0 signals. Only one can be
used at the same time, please select as followings.
J. I2C I/O power rail on user Port J17
I2C signals have been brought to user I/O connector J17 and the power rail can be configured as 1.8V
(default) or 3.3V , set as followings.
Both J16 and J19
Jump in 1-2
USB2.0 goes to J9, PCIe connector
Jump in 2-3
USB2.0 goes to J8, USB type A connector
I2C signals
Power rail
R53, R54
R78, R111
IO_SDA (J17, Pin20)
IO_SCL (J17, Pin19)
1.8V I/O
Do not populate
22 ohm
default
3.3V I/O
22 ohm
Do not populate
Pin1
