
RTL8100B(L) 
2001-11-9 
Rev.1.41 
31 
5.28 Config5: Configuration Register 5  
(Offset 00D8h, R/W) 
This register, unlike other Config registers, is not protected by 93C46 Command register. I.e. there is no need to enable Config 
register write prior to writing to Config5. 
Bit 
7 
6 
R/W 
- 
R/W 
Symbol 
- 
BWF 
Description 
Reserved
Broadcast Wakeup Frame: 
1: Enable Broadcast Wakeup Frame with mask bytes of only DID 
field = FF FF FF FF FF FF. 
0: Default value. Disable Broadcast Wakeup Frame with mask bytes 
of only DID field = FF FF FF FF FF FF. 
 The power-on default value of this bit is 0. 
Multicast Wakeup Frame: 
 1: Enable Multicast Wakeup Frame with mask bytes of only DID 
field, which is a multicast address. 
 0: Default value. Disable Multicast Wakeup Frame with mask bytes 
of only DID field, which is a multicast address. 
 The power-on default value of this bit is 0. 
Unicast Wakeup Frame: 
 1: Enable Unicast Wakeup Frame with mask bytes of only DID field, 
which is its own physical address. 
 0: Default value. Disable Unicast Wakeup Frame with mask bytes of 
only DID field, which is its own physical address. 
 The power-on default value of this bit is 0. 
FIFO Address Pointer:
 (Realtek internal use only to test FIFO SRAM) 
 1: Both Rx and Tx FIFO address pointers are updated in descending 
way from 1FFh and downwards. The initial FIFO address pointer is 
1FFh. 
 0: (Power-on) default value. Both Rx and Tx FIFO address pointers 
are updated in ascending way from 0 and upwards. The initial FIFO 
address pointer is 0. 
Note: This bit does not participate in EEPROM auto-load. The FIFO 
address pointers can not be reset, except initial power-on. 
 The power-on default value of this bit is 0. 
Link Down Power Saving mode: 
 1: Disable. 
 0: Enable. When cable is disconnected(Link Down), the analog part 
will power down itself (PHY Tx part & part of twister) automatically 
except PHY Rx part and part of twister to monitor SD signal in case 
that cable is re-connected and Link should be established again. 
LANWake signal enable/disable: 
 1: Enable LANWake signal. 
 0: Disable LANWake signal. 
PME_Status bit:
 Always sticky/can be reset by PCI RST# and software. 
 1: The PME_Status bit can be reset by PCI reset or by software. 
 0: The PME_Status bit can only be reset by software. 
5 
R/W 
MWF 
4 
R/W 
UWF 
3 
R/W 
FIFOAddrPtr 
2 
R/W 
LDPS 
1 
R/W 
LANWake 
0 
R/W 
PME_STS 
 
Config5 register, offset D8h: (SYM_ERR register is changed to Config5, the function of SYM_ERR register is no longer 
supported by RTL8100B(L).) 
 
The 3 bits (bit2-0) are auto-loaded from EEPROM Config5 byte to RTL8100B(L) Config5 register.