96Boards ROCK960 User Manual page 18

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 ROCK960 Board implementation supports a full four lane MIPI-CSI interface on CSI0 and two
lanes of MIPI-CSI on CSI1. All MIPI-CSI signals are routed directly to/from the RK3399 SoC. CSI0
can support up to 13M@30fps and CSI1 can support up to 8M@30fps. The max data rate of each
lane is 2.5Gbps.
I2C {2/3}
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. Then
an I2C interface shall be implemented.
The ROCK960 Board implementation supports two MIPI-CSI interfaces and therefore must support
two I2C interfaces. For MIPI-CSI0 the companion I2C2 is routed directly from the RK3399 SoC. For
MIPI-CSI1, the companion I2C is I2C3. Each of the I2C line's pull up can be set from RK3399
internally.
SD/SPI
The 96Boards specification calls for an SD interface or a SPI port to be part of the High Speed
Expansion Connector.
The ROCK960 Board implements a full SPI master with 4 wires (96Boards SPI Configuration),
CLK, CS, MOSI and MISO. All the signals are connected directly to the RK3399 SoC. These
signals are driven at 1.8V.
Clocks
The 96Boards specification calls for one or two programmable clock interfaces to be provided on
the High Speed Expansion Connector. These clocks may have a secondary function of being
CSI0_MCLK and CSI1_MCLK. If these clocks can't be supported by the SoC than an alternative
GPIO or No-Connect is allowed by the specifications.
The ROCK960 Board implements two CSI clocks which are connected directly to the RK3399 SoC.
These signals are driven at 1.8V.
USB
The 96Boards specification calls for a USB Data line interface to be present on the High Speed
Expansion Connector.
The ROCK960 Board implements this requirement by routing USB HOST1 of RK3399 to the High
Speed Expansion Connector.
HSIC
The 96Boards specification calls for an optional MIPI-HSIC interface to be present on the High
Speed Expansion Connector.
The ROCK960 Board implementation doesn't support this optional requirement.
Reserved
The pin 60 of the High Speed Expansion Connector is pulled up to VIO18_PMU via
100K resistor.
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