lan9512 Standard Microsystems Corp., lan9512 Datasheet - Page 30

• Manufacturer Part Number: lan9512
• Description: Usb Hub With Integrated 10/100 Ethernet Controller
• Manufacturer: Standard Microsystems Corp.

Revision 1.0 (04-20-09)
BITS
BITS
BITS
5:4
7:4
2:0
7:2
1:0
7:6
3
RESERVED
Port Re-Mapping Enable (PRTMAP_EN)
Selects the method used by the Hub to assign port numbers and disable
ports.
0 = Standard Mode. The following EEPROM addresses are used to define
which ports are enabled. The ports mapped as Port’n’ on the Hub are
reported as Port’n’ to the host, unless one of the ports is disabled, then the
higher numbered ports are remapped in order to report contiguous port
numbers to the host.
EEPROM Address 2Ah: Port Disable for Self-Powered operation
EEPROM Address 2Bh: Port Disable for Bus-Powered operation
1 = Port Re-Map mode. The mode enables remapping via the following
EEPROM addresses:
EEPROM Address 36h: Port Remap 12
EEPROM Address 37h: Port Remap 3
RESERVED
RESERVED
Upstream USB Electrical Signaling Drive Strength Boost Bit for
Upstream Port A (BOOST_IOUT_A)
00 = Normal electrical drive strength
01 = Elevated electrical drive strength (+4% boost)
10 = Elevated electrical drive strength (+8% boost)
11 = Elevated electrical drive strength (+12% boost)
RESERVED
Upstream USB Electrical Signaling Drive Strength Boost Bit for
Downstream Port 3 (BOOST_IOUT_3)
00 = Normal electrical drive strength
01 = Elevated electrical drive strength (+4% boost)
10 = Elevated electrical drive strength (+8% boost)
11 = Elevated electrical drive strength (+12% boost)
Table 3.6 Config Data Byte 3 Register (CFG3) Format
Table 3.7 Boost_Up Register (BOOSTUP) Format
Table 3.8 Boost_3:2 Register (BOOST32) Format
DESCRIPTION
DESCRIPTION
DESCRIPTION
DATASHEET
30
USB Hub with Integrated 10/100 Ethernet Controller
DEFAULT
DEFAULT
DEFAULT
000000b
000b
00b
00b
00b
0h
0b
SMSC LAN9512
Datasheet