TNETE2101

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

LOW-POWER PHYSICAL-LAYER INTERFACE

SPWS032D – JANUARY 1997 – REVISED MARCH 1999

14

POST OFFICE BOX 655303

PHY configuration (continued)

Table 3 shows the external configuration terminal, register value, and the result, except for the isolate function.

Table 3. Terminal and Register Values

TERMINAL

VALUE

(LOW = ACTIVE)

REGISTER

VALUE

WRITTEN

REGISTER

VALUE

READ

RESULT

Low

X

1

Enabled

High

0

0

Disabled

High

1

1

Enabled

Table 4 shows the operation for the isolate function and the resulting control of the isolate function.

Table 4. Isolate-Function Operation

TERMINAL

VALUE

(LOW = ACTIVE)

REGISTER

VALUE

WRITTEN

REGISTER

VALUE

READ

RESULT

Low

0

0

Disabled

Low

1

1

Enabled

High

X

0

Disabled

The terminal can be set to a value that disables control of the function through the internal PHY registers.