USB4624 Datasheet, PDF (44/68 Pages) SMSC Corporation – USB 2.0 HSIC Hi-Speed 4-Port Hub Controller

USB 2.0 HSIC Hi-Speed 4-Port Hub Controller
Datasheet
CONNECT_CFG
(0x318E- RESET=0x00)
BIT
NAME
7:2
Reserved
1
EN_FLEX_MODE
0
FLEXCONNECT
Table 7.11 Connect Configuration Register
CONNECT CONFIGURATION REGISTER
R/W DESCRIPTION
R
Reserved
R/W Flex Connect mode enable
0: Flex Connect mode is disabled. (Normal hub operation with separate
port power and OCS control)
1: Flex Connect mode is enabled
R/W FlexConnect Control. When asserted the device changes its hub
connections so that the Swap port (Physical Port 1) changes from it’s
default behavior of a downstream port to an upstream port. The Flex
Port (Physical port 0) transitions from an upstream port to a
downstream port.
‘0’ -
Flex Port = Upstream (Port 0)
Swap Port= Downstream (Port 1)
‘1’ -
Flex Port= Downstream (Port 1)
Swap Port= Upstream (Port 0)
This setting can be used to select whether the Flex Port is an upstream
or downstream port. The Flex Port provides both an HSIC and D+/D-
connection, so the OEM can select whether this flexibility is provided
on the upstream or downstream port.
Another application for this setting is to allow a dual-role device on the
Swap Port to assume a host role and communicate directly with other
downstream hub ports, or to communicate through the Flex Port to a
exposed connector to an external device.
If a “private” communication channel is desired between embedded
devices, any externally exposed ports should be disabled.
Note: All port-specific settings such as VSNS, prtSp, sDiscon are
specific to the logic port 0, 1, 2, 3. When FLEXCONNECT is asserted,
these settings affect the newly assigned physical pins and PHY. Any
settings which are specific to the physical Flex Port and Swap Port
such as battery charger detection do not change with the setting of
FLEXCONNECT.
Revision 1.0 (06-17-13)
44
DATASHEET
SMSC USB4624