BCM5208KPF Broadcom, BCM5208KPF Datasheet - Page 29

• Manufacturer Part Number: BCM5208KPF
• Manufacturer: Broadcom

Specifications of BCM5208KPF

• Number Of Receivers: 4
• Data Rate: 10/100Mbps
• Operating Temperature Classification: Commercial
• Operating Supply Voltage (min): 3.14V
• Mounting: Surface Mount
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Lead Free Status / RoHS Status: Not Compliant

November 3, 1999
AUTO-NEGOTIATION ADVERTISEMENT REGISTER
Table 10 shows the auto-negotiation advertisement register bit descriptions.
NEXT PAGE. The BCM5208 does not implement the Next Page function. Thus, bit 15 of the Advertisement Register must
always be written “0”.
REMOTE FAULT. Writing a “1” to bit 13 of the Advertisement Register causes a Remote Fault indicator to be sent to the
Link Partner during Auto-Negotiation. Writing a “0” to this bit or resetting the chip clears the Remote Fault transmission bit.
This bit returns the value last written to it, or else “0” if no write has been completed since the last chip reset.
RESERVED BITS. Ignore output when read.
PAUSE OPERATION FOR FULL-DUPLEX LINKS. The use of this bit is independent of the negotiated data rate, medium,
or link technology. The setting of this bit indicates the availability of additional DTE capability when full-duplex operation is
in use. This bit is used by one MAC to communicate Pause Capability to its Link Partner and has no effect on PHY
operation.
ADVERTISEMENT BITS. Bits 9:5 of the Advertisement Register allow the user to customize the ability information
transmitted to the Link Partner. The default value for each bit reflects the abilities of the BCM5208. By writing a “1” to any
of the bits, the corresponding ability will be transmitted to the Link Partner. Writing a “0” to any bit causes the corresponding
ability to be suppressed from transmission. Resetting the chip restores the default bit values. Reading the register returns
the values last written to the corresponding bits, or else the default values if no write has been completed since the last
chip reset. Even though that bit 9, Advertise 100BASE-T4 is writable, it should never be set since the BCM5208 is incapable
of the T4 operation.
SELECTOR FIELD. Bits 4:0 of the Advertisement register contain the fixed value “00001”, indicating that the chip belongs
to the 802.3 class of PHY transceivers.
Document 5208-DS03-R¥¥¥¥¥
BIT
15
14
13
12:11
10
9
8
7
6
5
4:0
NAME
Next Page
Reserved
Remote Fault
Reserved Technologies
Advertise Pause Capability
Advertise 100BASE-T4
Advertise 100BASE-X FDX
Advertise 100BASE-X
Advertise 10BASE-T FDX
Advertise 10BASE-T
Advertise Selector Field
Table 10: Auto-Negotiation Advertisement Register (Address 04d and 04h)
R/W
R/W
RO
R/W
RO
R/W
R/W
R/W
R/W
R/W
R/W
RO
B r o a d c o m C o r p o r a t i o n
DESCRIPTION
(Not Implemented)
Ignore when Read
1 = Transmit Remote Fault
Ignore when Read
1 = Pause Operation for Full-Duplex
0 = Do Not Advertise T4 Capability
1 = Advertise 100BASE-X Full-Duplex
0 = Do Not Advertise 100BASE-X Full-Duplex
1 = Advertise 100BASE-X
1 = Advertise 10BASE-T Full-Duplex
0 = Do Not Advertise 10BASE-T Full-Duplex
1 = Advertise 10BASE-T
Fixed value: indicates 802.3
DEFAULT
0
0
0
0
1 if RPTR = 0
0 if RPTR = 1
1 if RPTR = 0
0 if RPTR = 1
00001
1
1
n BCM5208
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