USB5537B Datasheet, PDF (47/79 Pages) Microchip Technology – 7-Port SS/HS USB Hub Controller

USB5537B
TABLE 5-40: PORT 3 POWER SELECT REGISTER (CONTINUED)
PRT_PWR_SEL3
(0X3C08)
Port 3 Power Select
Bit
Name
R/W
Description
3:0
PRT_SEL
R/W This selects the source for the port power for port1
0000b - Port Power is disabled for this Port.
0001b - Port is on if USB2 port power is on
0010b - Port is on if USB3 port power is on
0011b - Port is on if USB2 or USB3 port power is on
0100b - Port is on if designated GPIO is on
All other values are reserved.
Note: The port disable, port non-removable and combined mode bits must be set through a configuration file to
ensure functionality when the part enumerates.
5.6.24 PORT 4 POWER SELECT REGISTER
The bits in this register are configured via a configuration file. Users must not change the values of these settings
dynamically.
TABLE 5-41: PORT 4 POWER SELECT REGISTER
PRT_PWR_SEL4
(0X3C0C)
Port 4 Power Select
Bit
Name
R/W
Description
7
COMBINED_MODE R/W 0 - The Port Power and over-current sense use separate pins.
1 - The Port Power and over-current sense use the same pins.
6
Reserved
R
Reserved
5
DISABLED
R/W When set this disables the port. Used to inform the hub a port is
permanently disabled.
4
NR_DEVICE
R/W When set indicates this port has a permanently attached device.
3:0
PRT_SEL
R/W This selects the source for the port power for port1
0000b - Port Power is disabled for this Port.
0001b - Port is on if USB2 port power is on
0010b - Port is on if USB3 port power is on
0011b - Port is on if USB2 or USB3 port power is on
0100b - Port is on if designated GPIO is on
All other values are reserved.
Note: The port disable, port non-removable and combined mode bits must be set through a configuration file to
ensure functionality when the part enumerates.
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DS00001682C-page 47