November 2008

3

M9999-112008

MIC2551

Micrel, Inc.

SUS

OE#

D+, D–

RCV

VP/VM

Function

00

Driving

Active

Active

Normal transmit mode

01

Receiving

Active

Active

Normal receive mode

10

Hi-Z

0

Not active

Low power state

11

Hi-Z

0

Active

Receiving during suspend (low power

state) (Note 1)

Note 1. During suspend VP and VM are active in order to detect out of band signaling conditions.

Table 1. Function Selection

OE# = 0:

Input

Output

VP

VM

D+

D-

RCV

Result

0000

X

SE0

01010

Logic 0

10101

Logic 1

1111

X

Undefined

OE# = 1:

Input

Output

D+

D-

VP

VM

RCV

Result

0000

X

SE0

01010

Logic 0

10101

Logic 1

1111

X

Undefined

X - Undefined

Table 2. Truth Table During Normal Mode