Datasheet

2009-2016 Microchip Technology Inc. DS00002306A-page 23
LAN9514/LAN9514I
2Ah Port Disable (Self) Register (PDS)
Disables 1 or more ports.
0 = Port is available
1 = Port is disabled
During Self-Powered operation, this selects the ports which will be permanently
disabled, and are not available to be enabled or enumerated by a host controller.
The ports can be disabled in any order, the internal logic will automatically report the
correct number of enabled ports to the USB host, and will reorder the active ports in
order to ensure proper function.
Bit 7 = RESERVED
Bit 6 = RESERVED
Bit 5 = 1; Port 5 disabled
Bit 4 = 1; Port 4 disabled
Bit 3 = 1; Port 3 disabled
Bit 2 = 1; Port 2 disabled
Bit 1 = 1; Port 1 disabled
Bit 0 is RESERVED, always = 0b
00h
2Bh Port Disable (Bus) Register (PDB)
Disables 1 or more ports.
0 = Port is available
1 = Port is disabled
During Bus-Powered operation, this selects the ports which will be permanently
disabled, and are not available to be enabled or enumerated by a host controller.
The ports can be disabled in any order, the internal logic will automatically report the
correct number of enabled ports to the USB host, and will reorder the active ports in
order to ensure proper function.
Bit 7 = RESERVED
Bit 6 = RESERVED
Bit 5 = 1; Port 5 disabled
Bit 4 = 1; Port 4 disabled
Bit 3 = 1; Port 3 disabled
Bit 2 = 1; Port 2 disabled
Bit 1 = 1; Port 1 disabled
Bit 0 is RESERVED, always = 0b
00h
2Ch Max Power (Self) Register (MAXPS)
Value in 2 mA increments that the Hub consumes from an upstream port (VBUS)
when operating as a self-powered hub. This value includes the hub silicon along with
the combined power consumption (from VBUS) of all associated circuitry on the
board. This value also includes the power consumption of a permanently attached
peripheral if the hub is configured as a compound device, and the embedded
peripheral reports 0 mA in its descriptors.
Note: The USB 2.0 Specification does not permit this value to exceed 100 mA.
01h
2Dh Max Power (Bus) Register (MAXPB)
Value in 2 mA increments that the Hub consumes from an upstream port (VBUS)
when operating as a bus-powered hub. This value includes the hub silicon along with
the combined power consumption (from VBUS) of all associated circuitry on the
board. This value also includes the power consumption of a permanently attached
peripheral if the hub is configured as a compound device, and the embedded
peripheral reports 0 mA in its descriptors.
00h
TABLE 3-3: HUB CONFIGURATION (CONTINUED)
EEPROM
Offset
Description Default