
RTL8305SB 
2002/04/09 
19
Rev.1.0
5.10 Port Status Strapping Pins 
Those pins which are dual function pins are output for LED or input for strapping. Below are strapping descriptions only. 
 Pin Name 
Pin No. Type 
  Description 
LED_ADD[2]/ 
SetGroup 
Input upon reset = Set group of port 1
: 
1: Port 0 is group X. Port 1, 2, and 3 are group Y 
0: Port 0, and 1 are group X. Port 2, and 3 are group Y 
LED_ADD[3]/ 
GxMode 
Input upon reset = Group X operating mode
: 
1: UTP mode 
0: FX mode 
LED_ADD[4] 
/GyMode 
Input upon reset = Group Y operating mode
: 
1: UTP mode  
0: FX mode 
LED_DUP[0]/ 
P4ANEG 
Input upon reset = Port4 Auto-Negotiation ability
:  
1: Enable auto-negotiation (NWAY mode)  
0: Disable auto-negotiation (Force mode) 
Upon reset, this pin sets Reg.0.12 of Port4. Strap after reset for initial 
value of Port4 UTP mode only. This pin is not used for Port4 FX, MAC 
mode MII, PHY mode MII, and PHY mode SNI.  
LED_ACT[0]/ 
GxANEG 
Input upon reset = GroupX Auto-Negotiation ability
:  
1: Enable auto-negotiation (NWAY mode) 
0: Disable auto-negotiation (Force mode) 
Upon reset, this pin sets Reg.0. 12 of Group X. Strap after reset for initial 
value of UTP mode only. This pin is not used for FX. 
LED_SPD[0] 
/GyANEG 
Input upon reset = GroupY Auto-Negotiation ability
:  
1: Enable auto-negotiation(NWAY mode) 
0: Disable auto-negotiation (Force mode) 
Upon reset, this pin sets Reg.0. 12 of Group Y. Strap after reset for initial 
value of UTP mode only. This pin is not used for FX. 
LED_DUP[1] 
/GxSpd100 
GxSpd100=1, GxFull=1  
=> MII Reg0.13=1, 0.8=1, 4.8=1, 4.7=1, 4.6=1, 4.5=1 
GxSpd100=1, GxFull=0 
=> MII Reg0.13=1, 0.8=0, 4.8=0, 4.7=1, 4.6=1, 4.5=1 
GxSpd100=0, GxFull=1; 
=> MII Reg0.13=0, 0.8=1, 4.8=0, 4.7=0, 4.6=1, 4.5=1 
GxSpd100=0, GxFull=0; 
=> MII Reg0.13=0, 0.8=0, 4.8=0, 4.7=0, 4.6=0, 4.5=1 
Upon reset, this pin sets Reg.0.13. In addition, upon reset, this pin and 
GxFull also sets Reg.4.8/4.7/4.6/4.5. Strap after reset for initial value of 
Group X UTP mode only. This pin is not used for FX. 
Cont… 
Default  
1 
95 
I/O 
Output after reset = used for LED: 
96 
I/O 
Output after reset = used for LED: 
1 
99 
I/O 
Output after reset = used for LED: 
1 
103 
I/O 
Output after reset = used for LED: 
1 
104 
I/O 
Output after reset = used for LED: 
1 
105 
I/O 
Output after reset = used for LED: 
1 
107 
I/O 
Output after reset = used for LED: 
Input upon reset = GroupX 10Base-T/100Base-TX ability
: 
1