Ublox EVK-JODY-W2, Руководство пользователя

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EVK-JODY-W2 - User guide
UBX-19027118 - R06 Contents Page 19 of 25
C1 - Public
Figure 14: SDIO interface connector
All signals except VDD_SDIO are directly connected to the JODY-W2 module through 22
Ω
series
resistors connected on module board.
VDD_SDIO is connected to the power supply connector (J105) and is used for supplying 3.3 V for
VBAT from the SDIO interface. The SDIO interface has 50
Ω
impedance. The SDIO signals are powered
by the 1V8 voltage domain.
☞
Pull-up resistors for the SDIO lines are not installed on the EVB because they are typically
included in the host CPU. The EVB carrier board has the provision to install them in case if
needed by the design.
3.6 Bluetooth host interface
The Bluetooth UART host interface of the JODY-W2 series module can be accessed either directly
through the UART pins on J305, or through the USB type-C connector J205 through a USB-to-UART
bridge (default).
A USB-to-UART bridge (FTDI FT231X) is included on the evaluation board to connect to the high speed
UART interface of the JODY-W2 series modules.
VDD_USB3 from the USB connector is converted by
a DC-DC to 3.3 V and can be used for supplying VBAT from the USB interface. Place the jumper on
J400 to use Bluetooth through the USB type-C connector.
Figure 15: Jumper setting to use Bluetooth over USB
The 4-pin UART interface of the JODY-W2 series modules can be directly accessed through the
Bluetooth UART connector J305, as shown in
Figure 16 . To use the UART interface directly, remove
the jumper on J400 and connect the UART host interface to the respective module side pins and GND
on J305 , as shown in Figure 16 and Table 9 . The UART signals are powered by the VIO voltage domain.
J400