
6. Register Description 
RTL8305SB 
2002/04/09 
21
Rev.1.0
Hardware Reset: pin RESET# = 0 to 1. Reset all then load EEPROM and Pin registers with serial EEPROM and Pins strappings. 
Soft Reset: Write bit15 of Reg16 of PHY3 as 1. Reset all except loading EEPROM and Pin Registers with serial EEPROM and Pins. 
After updating the EEPROM or Pin registers via SMI, the external device has to do soft reset in order to change the configuration.  
Name 
Soft Reset 
PHY 
Register 
0 
 Control Register 
1 
 Status Register 
4 
 Auto-Negotiation Advertisement Register 
5 
 Auto-Negotiation Link Partner Ability Register 
6 
 Auto-Negotiation Expansion Registers 
0 
 Control Register 
1 
 Status Register 
4 
 Auto-Negotiation Advertisement Register 
5 
 Auto-Negotiation Link Partner Ability Register 
6 
 Auto-Negotiation Expansion Registers 
0 
 Control Register 
1 
 Status Register 
4 
 Auto-Negotiation Advertisement Register 
5 
 Auto-Negotiation Link Partner Ability Register 
6 
 Auto-Negotiation Expansion Registers 
0 
 Control Register 
1 
 Status Register 
4 
 Auto-Negotiation Advertisement Register 
5 
 Auto-Negotiation Link Partner Ability Register 
6 
 Auto-Negotiation Expansion Registers 
0 
 Control Register 
1 
 Status Register 
4 
 Auto-Negotiation Advertisement Register 
5 
 Auto-Negotiation Link Partner Ability Register  
6 
 Auto-Negotiation Expansion Registers 
EEPROM Reg0 
Need 
0 
16~22 
 Register for EEPROM 
EEPROM Reg1 
Need 
1 
16~31 
 Register for EEPROM 
Pin Reg  
Need 
2 
16 
 Register for some Pins  
Pin & EEPROM Reg 
Need 
2 
17 
 Register for some Pins and EEPROM 
Port Control Reg 
No 
3 
16 
 Register for Port Control 
EEPROM Reg 
Need 
3 
17~20 
 Register for EEPROM 
RO:  Read Only 
RW: Read/Write 
LL: Latch Low until clear 
LH:  Latch High until clear 
SC: Self Clearing 
Register Description 
Port0 PHY Reg 
No 
0 
Port1 PHY Reg 
No 
1 
Port2 PHY Reg 
No 
2 
Port3 PHY Reg 
No 
3 
Port4 PHY Reg 
No 
4