AM79C873 Advanced Micro Devices, AM79C873 Datasheet - Page 23

• Manufacturer Part Number: AM79C873
• Description: NetPHY -1 10/100 Mbps Ethernet Physical Layer Single-Chip Transceiver with 100BASE-FX Support
• Manufacturer: Advanced Micro Devices

Basic Mode Status Register (BMSR) -
Register 1
PHY ID Identifier Register 1 (PHYIDR1) -
Register 2
The PHY Identifier Registers 1 and 2 work together in
a single identifier of the NetPHY-1 device. The Identifier
consists of a concatenation of the Organizationally
PHY Identifier Register 2 (PHYIDR2) -
Register 3
Bit
3.15-3.10
2.15-2.0
3.9-3.4
3.3-3.0
1.1
1.0
Bit
Bit
Bit Name
Jabber Detect
VNDR_MDL
OUI_MSB
MDL_REV
Bit Name
Bit Name
Capability
OUI_LSB
Extended
Default
<101110>,RO/P
<000000>,RO/P
<0001>,RO/P
<0181H>
Default
Default
1,RO/P
RO/LH
0,
P R E L I M I N A R Y
OUI Most Significant Bits:
This register stores bits 3 - 18 of the OUI (00606E) to bits 15 - 0 of this
register, respectively. The most significant two bits of the OUI are ignored
(the IEEE standard refers to these as bit 1 and 2).
OUI Least Significant Bits:
Bits 19 - 24 of the OUI (00606E) are mapped to bits 15 - 10 of this register,
respectively.
Vendor Model Number:
Six bits of the vendor model number mapped to bits 9 - 4 (most significant
bit to bit 9).
Model Revision Number:
Four bits of the vendor model revision number mapped to bits 3 - 0 (most
significant bit to bit 3).
Description
Jabber Detect:
1=Jabber condition detected.
0=No jabber condition detected.
This bit is implemented with a latching function. Once Jabber conditions
are detected this bit will remain set until a read operation is completed
through a management interface or a NetPHY-1 device reset. This bit
works only in 10 Mbps mode.
Extended Capability:
1=Extended register capable.
0=Basic register capable only.
Am79C873
Unique Identifier (OUI), a vendor's model number,
and a model revision number. The IEEE assigned OUI
is 00606E.
Description
Description
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