RTL8208 Ver la hoja de datos (PDF) - Realtek Semiconductor
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RTL8208 Datasheet PDF : 40 Pages
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RTL8208
Auto-negotiation is restarted or the RTL8208 is reset.
10Base-T-FD – This bit indicates that the Link Partner can support 10Base-T full duplex mode. This bit is cleared any time
Auto-negotiation is restarted or the RTL8208 is reset.
10Base-T – This bit indicates that the Link Partner can support 10Base-T half duplex mode. This bit is cleared any time
Auto-negotiation is restarted or the RTL8208 is reset.
Selector Field – Bits 4:0 reflect the value of the Link Partner’s selector field. These bits are cleared any time Auto-negotiation is
restarted or the chip is reset, and generally reflect the value of 0001, indicating that the Link Partner is an 802.3 device.
6.7 Register6: Auto-Negotiation Expansion
Reg. bit
6.[15:5]
6.4
6.3
6.2
6.1
6.0
Name
Reserved
Parallel Detection
Fault
Link Partner Next
Page Able
Local Next Page
Able
Page Received
Link Partner Auto-
Negotiation Able
Description
1=A fault has been detected via the Parallel Detection function.
0=No fault has been detected via the Parallel Detection function.
1= Link Partner is Next Page able.
0= Link Partner is not Next Page able.
1= RTL8208 is Next Page able.
0= RTL8208 is not Next Page able. (permanently=0)
1= A New Page has been received.
0= A New Page has not been received.
If Auto- Negotiation is enabled, this bit means:
1= Link Partner is Auto-Negotiation able.
0= Link Partner is not Auto-Negotiation able.
In 100FX or Nway disabled, this bit always =1.
Mode
RO
RO
Default
0
0
RO
0
RO
0
RO/LH
0
RO 0 (Auto-
Negotiation)
or
1 (100FX)
Reserved – Ignore the output of the RTL8208 when these bits are read.
Parallel Detection Fault – Bit 4 is a read-only bit that gets latched high when a parallel detection fault occurs in the
Auto-negotiation state machine. For further details, please consult the IEEE standard. The bit is reset to ‘0’ after the register is
read, or when the chip is reset.
Link Partner Next Page Able – Bit 3 returns a ‘1’ when the Link Partner has Next Page capabilities. It has the same value as bit
15 of the Link Partner Ability Register.
Local Next Page Able – The RTL8208 does not have Next Page capabilities, so it will always return a ‘0’ when bit 2 is read.
Page Received – Bit 1 is latched high when a new link code word is received from the Link Partner, checked and acknowledged.
This bit is cleared when the link is lost or the chip is reset.
Link Partner Auto-Negotiation Able – Bit 0 returns a ‘1’ when the Link Partner is known to have Auto-negotiation capabilities.
Before any Auto-negotiation information is exchanged, or if the Link Partner does not comply with IEEE Auto-negotiation, the
bit returns a value of ‘0’.
2003/04/04
18
Rev.1.97
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