TNETE2101

10BASE-T/100BASE-TX/100BASE-FX

LOW-POWER PHYSICAL-LAYER INTERFACE

SPWS032D – JANUARY 1997 – REVISED MARCH 1999

21

POST OFFICE BOX 655303

PHY generic identifier – GEN_id_hi/GEN_id_lo at 0x02/03

These two hardwired 16-bit registers contain an identifier code for the 10BASE-T/100BASE-TX PHY.

GEN_id_hi contains 0x4000, and GEN_id_lo contains 0x503X.

The PHY ID is composed of bits 3–24 of the 25-bit organizationally unique identifier (OUI) assigned to TI by

IEEE. Bit 3 of the OUI maps to bit 15 of GEN_id_hi, bit 4 of the OUI to bit 14 of the GEN_id_hi, and so on.

Figures 9 and 10 show the bit layout of GEN_id_hi and GEN_id_lo.

BIT

15

14

13

12

11

10

98

76

54

321

BIT

0

OUI

Bits 3–18

0

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

Figure 9. PHY Generic Identifier – GEN_id_hi at 0x02

BIT

15

14

13

12

11

10

98

76

54

321

BIT

0

OUI

Bits 19–24

Manufacturer Model Number

Manufacturer Revision Number

0

1

0

1

0

0

0

0

0

0

1

1

X

X

X

X

Figure 10. PHY Generic Identifier – GEN_id_lo at 0x03