Thundercomm Qualcomm Robotics RB5 - Mipi Csi; I2 C; Hsic; Reserved

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Robotics RB5 Development Kit Hardware User Manual

The 96Boards specification calls for a MIPI-DSI to be present on the high-speed expansion

connector. A minimum of one lane is required and up to four lanes can be accommodated

on the connector.

RB5 implementation supports a full 4-lane MIPI-DSI interface that is routed to HS1. A DSI

switch, FS644, is used to support on board DSI-to-HDMI bridging. DSI switch is controlled

via DIP switch #16, pin4, DIP_HDMI_SWITCH. When set to ON, it will enable DSI0 to HS1

and DSI1 to HS3; when set to OFF, will enable DSI1&2 to LT9611UXC and on board HDMI.

5.1.2 MIPI CSI

The 96Boards specification calls for two MIPI-CSI interfaces to be present on the high-

speed expansion connector. Both interfaces are optional. CSI0 interface can be up to four

lanes while CSI1 is up to two lanes.

The current Robotics RB5 Development Kit implementation supports a full 4-lane MIPI-

CSI interface on CSI0 and two lanes of MIPI-CSI on CSI3. All MIPI-CSI signals are routed

directly to and from the QRB5165 processor.

5.1.3 I2C

The 96Boards specification calls for two I2C interfaces to be present on the high-speed

expansion connector. Both interfaces are optional unless a MIPI-CSI interface has been

implemented. In this case, an I2C interface shall be implemented.

Robotics RB5 Development Kit have two CCI I2C interface, I2C0&I2C1, in HS1.

NOTE: Both interfaces, I2C0 and I2C1 are pull-up to 1.8V via 2.2K resistor in 865SOM.

5.1.4 HSIC

The 96Boards specification calls for an optional MIPI-HSIC interface to be present on the

High Speed Expansion Connector.

The RB5 board implementation doesn't support this optional requirement.

5.1.5 Reserved

The 96Boards specification calls for a 10K pull-up to 1.8V to be connected to pin 60 of the

High Speed Expansion Connector.

In RB5, a NC resistor is used in HS1 to connect pin60 of HS1 to 1.8V.

5.1.6 SD/SPI

The 96Boards specification calls for an SD interface or a SPI port to be part of the High

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