
6.1.4 Register5: Auto-Negotiation Link Partner Ability Register 
 Reg.bit 
 Name 
 Description 
 5.15 
 Next Page 
 1: Link partner desires Next Page transfer. 
 0: Link partner does not desire Next Page transfer. 
 5.14 
 Acknowledge 
 1: Link Partner acknowledges reception of FLP words. 
 0: Not acknowledged by Link Partner. 
 5.13 
 Remote Fault 
 1: Remote Fault indicated by Link Partner. 
 0: No remote fault indicated by Link Partner. 
 5.[12:11] 
 Reserved 
 5.10 
 Pause 
 1: Flow control supported by Link Partner. 
 0: No flow control supported by Link Partner. 
Note: this bit is read only when Reg0.12=1. This bit is 
read/write when Reg0.12=0 for future use. 
 5.9 
 100Base-T4 
 1: 100Base-T4 supported by Link Partner. 
 0: 100Base-T4 not supported by Link Partner. 
 5.8 
 100Base-TX-FD 
 1: 100Base-TX full duplex supported by Link Partner. 
 0: 100Base-TX full duplex not supported by Link Partner.  
RTL8305SB 
2002/04/09 
24
Rev.1.0
 Mode 
 RO 
Default 
0 
 RO 
0 
 RO 
0 
 RO 
 RW 
0 
0 
 RO 
0 
 For 100FX mode, this bit is set when Reg.0.8=1 or **Full =1 
after link established. 
 When Nway disabled TX mode, this bit is set when 
Reg.0.13=1,and Reg.0.8=1 after link established. 
 1: 100Base-TX half duplex supported by Link Partner. 
 0: 100Base-TX half duplex not supported by Link Partner.  
 RO 
0 
 5.7 
 100Base-TX 
 For 100FX mode, this bit is set when Reg.0.8=0 or **Full = 0 
after link established. 
 When Nway disabled, this bit is set when Reg.0.13=1,and 
Reg.0.8=0 after link established. 
 1: 10Base-TX full duplex supported by Link Partner. 
 0: 10Base-TX full duplex not supported by Link Partner. 
 RO 
0 
 5.6 
 10Base-T-FD 
When Nway disabled, this bit is set when Reg.0.13=0,and 
Reg.0.8=1 after link established. 
 1: 10Base-TX half duplex supported by Link Partner. 
 0: 10Base-TX half duplex not supported by Link Partner. 
When Nway disabled, this bit is set when Reg.0.13=0,and 
 RO 
0 
 5.5 
 10Base-T 
Reg.0.8=0. after link established 
 [00001]=IEEE802.3 
 RO 
0 
 5.[4:0] 
6.1.5 Register6: Auto-Negotiation Expansion Register 
 Selector Field 
 RO 
00001 
 Reg.bit 
 6.[15:5] 
 6.4 
 Name 
 Reserved 
 Parallel Detection   
 Fault 
 Link Partner Next 
 Page Able 
 Local Next Page  
 Able 
 Page Received 
 Description 
 1: A fault has been detected via the Parallel Detection function. 
 0: A fault has not been detected via the Parallel Detection function. 
 1: Link Partner is Next Page able. 
 0: Link Partner is not Next Page able. (permanently=0) 
 1: RTL8305SB is Next Page able. 
 0: RTL8305SB is not Next Page able. 
 1: A New Page has been received. 
 0: A New Page has not been received. 
 If Nway is enabled, this bit means:  
 1: Link Partner is Auto-Negotiation able. 
 0: Link Partner is not Auto-Negotiation able. 
 Mode 
 RO 
 RO 
Default 
0 
0 
 6.3 
 RO 
0 
 6.2 
 RO 
0 
 6.1 
 RO 
0 
 6.0 
 Link Partner Auto- 
 Negotiation Able 
 In 100FX or Nway disabled, this bit always =1. 
 RO 
0
 (Nway) 
or  
1
 (Force)