BCM5208KPF Broadcom, BCM5208KPF Datasheet - Page 42

• 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

n BCM5208
AUXILIARY MULTIPLE PHY REGISTER
The bit descriptions for the auxiliary multiple PHY register are shown in Table 25.
HCD BITS. Bits 15:11 of the Auxiliary Multiple PHY Register are five read-only bits that report the Highest Common
Denominator (HCD) result of the Auto-Negotiation process. Immediately upon entering the Link Pass state after each reset
or Restart Auto-Negotiation, only one of these five bits will be “1”. The Link Pass state is identified by a “1” in bit 6 or 7 of
this register. The HCD bits are reset to “0” every time Auto-Negotiation is restarted or the BCM5208 is reset. Note that for
their intended application, these bits will uniquely identify the HCD only after the first Link Pass after reset or restart of Auto-
Negotiation. On later Link Fault and subsequent re-negotiations, if the ability of the Link Partner is different, more than one
of the above bits may be active. These bits are only set for full Auto-Negotiation hand-shake, and not for Parallel Detection
of Forced speed modes. Note that bit 14, HCD_T4, will never be set in the BCM5208.
RESTART AUTO-NEGOTIATION. A self-clearing bit that allows the Auto-Negotiation process to be restarted, regardless
of the current status of the state machine. For this bit to work, Auto-Negotiation must be enabled. Writing a “1” to this bit
restarts Auto-Negotiation. Since the bit is self-clearing, it always returns a “0” when read. The operation of this bit is identical
to bit 9 of the Control Register.
AUTO-NEGOTIATION COMPLETE. This read-only bit returns a “1” after the Auto-Negotiation process has been
completed. It remains “1” until the Auto-Negotiation process is restarted, a Link Fault occurs, or the chip is reset. If Auto-
Negotiation is disabled or the process is still in progress, the bit returns a “0”.
FLP-Link Good-Check. This read-only bit returns a “1” when the Auto-Negotiation arbitrator state machine has entered
the FLP-link Good-Check state. It remains this value until the Auto-Negotiation process is restarted, a Link Fault occurs,
Auto-Negotiation is disabled, or the BCM5208 is reset.
ACKNOWLEDGE DETECTED. This read-only bit is set to “1” when the Arbitrator state machine exits the Acknowledged
Detect state. It remains high until the Auto-Negotiation process is restarted, or the BCM5208 is reset.
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BIT
15
14
13
12
11
10:9
8
7
6
5
4
3
2
1
0
NAME
HCD_TX_FDX
HCD_T4
HCD_TX
HCD_10BASE-T_FDX
HCD_10BASE-T
Reserved
Restart Auto-Negotiation
Auto-Negotiation Complete
FLP-Link Good-Check
Acknowledge Detected
Ability Detect
Super Isolate
Reserved
10BASE-T Serial Mode
RXER Code Mode
Table 25: Auxiliary Multiple PHY Register (Address 30d, 1Eh)
R/W
RO
RO
RO
RO
RO
RO
R/W
(SC)
RO
RO
RO
RO
R/W
RO
R/W
R/W
B r o a d c o m C o r p o r a t i o n
DESCRIPTION
1 = Auto-Negotiation result is 100BASE-TX full-duplex 0
0 = BCM5208 doesn’t support 100BASE-T4 ability
1 = Auto-Negotiation result is 100BASE-TX
1 = Auto-Negotiation result is 10BASE-T full-duplex
1 = Auto-Negotiation result is 10BASE-T
Ignore when Read
1 = restart Auto-Negotiation process
0 = (No effect)
1 = Auto-Negotiation process Completed
0 = Auto-Negotiation process not Completed
1 = Auto-Negotiation FLP-Link Good-Check
1 = Auto-Negotiation Acknowledge Detected
1 = Auto-Negotiation waiting for LP Ability
1 = Super Isolate mode
0 = Normal Operation
Ignore when Read
1 = Enable 10BASE-T Serial Mode
0 = Disable 10BASE-T Serial Mode
1 = Enable RXER Code Mode
0 = Disable RXER Code Mode
Document 5208-DS03-R¥¥¥¥¥
November 3, 1999
DEFAULT
0
0
0
0
0
0
0
0
0
0
0
0
0
0