ICS1892
TSD
Chapter 8 Management Register Set
10Base-T/100BIaCseS-TX1I8nt9eg2rated PHYceiver™
8.5 Register 3: PHY Identifier Register
Table 8-9 lists the bits for PHY Identifier Register (Register 3), which is one of two PHY Identifier Registers
that are part of a set defined by the ISO/IEC specification. This register stores the following:
• Part of the OUI [see the text in Section 8.4, “Register 2: PHY Identifier Register”]
• Manufacturer’s PHY Model Number
• Manufacturer’s PHY Revision Number
All of the bits in the two PHY Identifier Registers are Command Override Write bits. An STA can read them
at any time without condition. However, An STA can modify these register bits only when the Command
Register Override bit (bit 16.15) is enabled with a logic one.
Note: For an explanation of acronyms used in Table 8-5, see Chapter 1, “Abbreviations and Acronyms”.
Table 8-9. PHY Identifier Register (Register 3 [0x03])
Bit
Definition
When Bit = 0 When Bit = 1 Access
Special
Default Hex
Function
3.15 OUI bit 19 | s
3.14 OUI bit 20 | t
3.13 OUI bit 21 | u
3.12 OUI bit 22 | v
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
CW
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1
1
1
1
0
1
0
0
0
0
1
1
0
0
0
0
F
4
3
0
3.11
OUI bit 23 | w
3.10 OUI bit 24 | x
3.9
3.8
3.7
3.6
3.5
3.4
3.3
3.2
3.1
3.0
Manufacturer’s Model Number bit 5
Manufacturer’s Model Number bit 4
Manufacturer’s Model Number bit 3
Manufacturer’s Model Number bit 2
Manufacturer’s Model Number bit 1
Manufacturer’s Model Number bit 0
Revision Number bit 3
Revision Number bit 2
Revision Number bit 1
Revision Number bit 0
8.5.1 OUI bits 19-24 (bits 3.15:10)
The most significant 6 bits of register 3 (that is, bits 3.15:10) include OUI bits 19 through 24. OUI bit 19 is
stored in bit 3.15, while OUI bit 24 is stored in bit 3.10.
8.5.2 Manufacturer's Model Number (bits 3.9:4)
The model number for the ICS1892 is 3 (decimal). It is stored in bit 3.9:4 as 00011b.
ICS1892, Rev. D, 2/26/01
February 26, 2001
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
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IDT™ / ICS™ 10Base-T/100Base-TX Integrated PHYceiver™
ICS1892
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IDT [ INTEGRATED DEVICE TECHNOLOGY ]
