USB Hub with Integrated 10/100 Ethernet Controller
Datasheet
Table 3.6 Config Data Byte 3 Register (CFG3) Format
BITS | DESCRIPTION | DEFAULT |
|
|
|
7:4 | RESERVED | 0h |
|
|
|
3 | Port | 0b |
| 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 |
|
| EEPROM Address 2Bh: Port Disable for |
|
| 1 = Port |
|
| EEPROM addresses: |
|
| EEPROM Address 36h: Port Remap 12 |
|
| EEPROM Address 37h: Port Remap 34 |
|
| EEPROM Address 38h: Port Remap 5 |
|
|
|
|
2:0 | RESERVED | 000b |
|
|
|
Table 3.7 Boost_Up Register (BOOSTUP) Format
BITS |
| DESCRIPTION | DEFAULT |
|
|
| |
7:2 | RESERVED | 000000b | |
|
|
| |
1:0 | Upstream USB Electrical Signaling Drive Strength Boost Bit for | 00b | |
| 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) |
| |
|
|
|
|
Table 3.8 Boost_5 Register (BOOST5) Format
BITS |
| DESCRIPTION | DEFAULT |
|
|
| |
7:2 | RESERVED | 000000b | |
|
|
| |
1:0 | Upstream USB Electrical Signaling Drive Strength Boost Bit for | 00b | |
| Downstream Port 5 (BOOST_IOUT_5) |
| |
| 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) |
| |
|
|
|
|
SMSC LAN9514 | 31 | Revision 1.0 |
| DATASHEET |
|