12
USB Type-C Demo Kit V2 Board
USB Super-Speed Switch/Alternate Mode Function
The development kit includes a super-speed switch IC (U11 - HD3SS460) along with a high-speed USB switch
(U19 – PI3DBS3224). The super-speed switch IC is used to demonstrate the orientation-agnostic capability of the
USB Type-C connector. The switches connect various USB sockets. Figure 6 shows the switch functions and the
data flow diagram.
Figure 6. Super Speed Block
U11 is connected on one side to the standard-USB 9-pin connector (J6), the Mini DP connectors (CN1 and CN3)
and the other side connected to the USB Type-C connector (CN1). J6 provides a bi-directional Super-Speed chan-
nel as well as a bi-directional High-Speed channel, with CN1, CN2 providing a unidirectional display source data.
The U11 switch connection is managed by the iCE40 device on the board, using the SS_EN, SS_AMSEL, and
SS_POL signal inputs to U11. For more information refer the documentation on the super-speed switch demo.
Table 10 provides the detailed definition of the mode supported by the super speed switch.
USB
Type B
(J4)
DP
Type C
Connector
(CN1)
T1
HD3SS460
(U12)
SSRX+/-
SSTX+/-
LNA
LNB
LNC
LNQ
POL
A
MSEL
EN
SSRX
SSTX
CRX1
CTX1
RX1
TX1
CRX2
CTX2
RX2
TX2
SS
HS
SBU1
SBU2
RFU1
RFU2
