Thundercomm Qualcomm Robotics RB5, Hardware User Manual

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Robotics RB5 Development Kit Hardware User Manual
Copyright© 2020 Thundercomm Technology Co., Ltd. All rights reserved.
17
28 GPIO-F DISPLAY MIPI_ERR_ FG /
QUP15
30 GPIO-H DISP_RST_N
33 GPIO-J CAM0_PWDN
34 GPIO-L CAM1_PWDN
36 DC12V
38 DC12V
40 GND
4.1.1 UART
The 96Boards specification calls for a 4-wire UART implementation, UART0 and an
optional second 2-wire UART, UART1 on the low-speed expansion connector.
RB5 implements UART0 as a 4-wire UART that connects directly to the QRB5165 SoC.
These signals are driven at 1.8 V.
RB5 implements UART1 as a 2-wire UART that connects directly to the QRB5165 SoC.
These signals are driven at 1.8 V.
4.1.2 I2C
The 96Boards specification calls for two I2C interfaces to be implemented on the low-
speed expansion connector.
RB5 has both I2C0 and I2C1 interfaces. The interfaces connect directly to the QRB5165
SoC. A resistor is needed to provide pull-up for each of the I2C lines per the I2C
specifications. These pull-ups are connected to the 1.8 V voltage rail.
4.1.3 GPIO
The 96Boards specification calls for twelve GPIO lines to be implemented on the low-
speed expansion connector.
RB5 implements this requirement. Twelve GPIOs are routed from the QRB5165 SoC. The
GPIOs are 1.8V voltage rail.

GPIO A/QUP_A0: Connects to GPIO_4 of QRB5165 SoC. Can be configured to be an
IRQ line.

GPIO B: Connects to GPIO_136 of QRB5165 SoC. Can be configured to be an IRQ line
and SEC_MI2S_MCLK.

GPIO C/QUP_A1: Connects to GPIO_5 of QRB5165 SoC.

GPIO D/QUP_A3: Connects to GPIO_7 of QRB5165 SoC.

GPIO E/QUP_A2: Connects to GPIO_6 of QRB5165 SoC.

GPIO F: Connects to GPIO_46 of QRB5165 SoC.