RTL8208B-LF/RTL8208BF-LF
Datasheet
6.5. Register4: Auto-Negotiation Advertisement
This register contains the advertisement abilities of this device that will be transmitted during auto-
negotiation.
Table 15. Register4: Auto-Negotiation Advertisement
Reg. bit Name
Description
Type
Default
4.15
Next Page
1: Next Page enabled
0: Next Page disabled (Permanently =0)
Permanently =0.
1: Transmit remote fault
0: Do not transmit remote fault
Reserved.
RO
0
4.14
4.13
Acknowledge
Remote Fault
RO
RW
0
0
4.12
4.11
Reserved
RW
RW
0
Asymmetric Pause 1: Advertises that the RTL8208B(F)-LF has asymmetric
flow control capability
Set by
TP_ASY_PAUSE
Or
0: No asymmetric flow control capability
In 100FX mode, this bit is set by FX_ASY_PAUSE upon
reset.
FX_ASY_PAUSE
In 100/10TP mode, this bit is set by TP_ASY_PAUSE
upon reset.
4.10
Pause
1: Advertises that the RTL8208B(F)-LF has flow control
capability
0: No flow control capability
RW
Set by
TP_PAUSE
Or
In 100FX mode, this bit is set by FX_PAUSE upon reset.
In 100/10TP mode, this bit is set by TP_PAUSE upon
reset.
FX_PAUSE
4.9
4.8
100Base-T4
100Base-TX-FD
100Base-TX
10Base-T-FD
10Base-T
1: 100Base-T4 capable
RO
RW
RW
RW
RW
RO
0
0: Not 100Base-T4 capable (permanently =0)
1: 100Base-TX full duplex capable
0: Not 100Base-TX full duplex capable
1: 100Base-TX half duplex capable
0: Not 100Base-TX half duplex capable
1: 10Base-TX full duplex capable
0: Not 10Base-TX full duplex capable
1: 10Base-TX half duplex capable
0: Not 10Base-TX half duplex capable
[00001]=IEEE 802.3.
1
4.7
1
4.6
1
1
4.5
4.[4:0]
Selector Field
00001
Next Page – The RTL8208B(F)-LF does not implement the Next Page function, so bit 15 will always
return a ‘0’ when read.
Acknowledge – Because the Next Page function is not implemented, bit 14 will always return a ‘0’ when
read.
Remote Fault –Writing a ‘1’ to this bit causes a remote fault indicator to be sent to the link partner
during auto-negotiation.
Reserved – Reserved bits are R/W to allow for forward compatibility with future IEEE standards.
Single-Chip Octal 10/100-TX/FX PHY Transceiver
19
Track ID: JATR-1076-21 Rev. 1.3
REALTEK [ Realtek Semiconductor Corp. ]
