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3.3.7
USB Connectors
RK3399 SoC embeds two USB 2.0 and two USB 3.0 controllers, which allow to implement, on-board, the following interfaces:
•
1x USB 3.0 Type C port on connector CN9 (used as Display Port 1.2 interface in Alternate Mode)
•
1x USB 3.0 Host Port on Type A socket CN10
•
2 x USB 2.0 Host ports on Dual Type-A socket CN7
•
2 x USB 2.0 Host ports on internal pin header CN8
USB 3.0 port#0 type C receptacle
Pin
Signal
Pin
Signal
A1
GND
B12 GND
A2
USBC0_SSTXA+
B11 USBC0_SSRXA+
A3
USBC0_SSTXA-
B10 USBC0_SSRXA-
A4
VBUS_C0
B9
VBUS_C0
A5
USBC0_CC1
B8
USBC0_SBU2
A6
USB0_A+
B7
USB0_B-
A7
USB0_A-
B6
USB0_B+
A8
USBC0_SBU1
B5
USBC0_CC2
A9
VBUS_C0
B4
VBUS_C0
A10 USBC0_SSRXB-
B3
USBC0_SSTXB-
A11 USBC0_SSRXB+
B2
USBC0_SSTXB+
SBC-C31
VBUS_C0: Power bus, derived from +5V_ALW power rail, current limited to 1A @5V
SBC-C31
SBC-C31 User Manual - Rev. First Edition: 1.0 - Last Edition: 1.0 - Author: A.R. - Reviewed by D.T. - Copyright © 2021 SECO S.p.A.
USB 3.0 port #0 is available on standard Type-C connector CN9, with DisplayPort Alternate Mode
CN9
Support. This means that USB type-C connector can be used to connect external USB devices as well
as DP/HDMI displays. This port has also OTG functionalities support.
In addition, USB Type-C is a flippable connector, meaning that this interface is designed in a way that
the plug can be flipped relative to the receptacle. The redundancy for the
signal on Row A and B is included only to provide a flippable connector.
Signal description of this port:
USBC0_SSTXx+ USBC0_SSTXx-: USB Super Speed Port #0 transmit signal differential pair
USBC0_SSRXx+ USBC0_SSRXx-: USB Super Speed Port #0 receive signal differential pair
USB0_X+ / USB0_X- : USB2.0 OTG Port #0 differential pair
USBC_CC1 / USBC_CC2: Configuration Channels, used to detect cable attachment and removal,
receptacle/plug orientation detection, and current advertisement. Signals directly manged by the USB
Type-C controller on SBC-C31
USBC0_SBU1 / USBC0_SBU2: Sideband use signals, not used for USB, used as auxiliary channel
differential data pair in Display Alternate Mode. Signals directly manged by the USB Type-C controller on
31
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