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FUNCTIONAL DESCRIPTION

Function Selection

Operating Functions

TUSB1105, TUSB1106

ADVANCED UNIVERSAL SERIAL BUS TRANSCEIVERS

SCAS818D – MAY 2006 – REVISED FEBRUARY 2008

FUNCTION TABLE

SUSPND

OE

D+, D–

RCV

VP, VM

FUNCTION

L

L

Driving and receiving

Active

Active

Normal driving (differential receiver active)

L

H

Active

Active

Receiving

H

L

Driving

Active

H

H

Active

Low-power state

(1)

Signal levels on D+ and D– are determined by other USB devices and external pullup/pulldown resistors.

(2)

In suspend mode (SUSPND = HIGH) the differential receiver is inactive and output RCV is always LOW. Out of suspend (K), signaling is

detected via the single-ended receivers VP and VM.

(3)

During suspend, the slew-rate control circuit of low-speed operation is disabled. The D+ and D– lines are still driven to their intended

states, without slew-rate control. This is permitted because driving during suspend is used to signal remote wakeup by driving a K signal

(one transition from idle to K state) for a period of 1 ms to 15 ms.

FUNCTION TABLES

xxx

Driving Function (Pin OE = L)

Using Single-Ended Input Data Interface

for TUSB1105 (Pin MODE = L)

DATA STATE

FSE0

VO

DATA

LOW SPEED

FULL SPEED

L

L

Differential logic 0

J

K

L

H

Differential logic 1

K

J

H

L

SE0

X

X

H

H

SE0

X

X

Driving Function (Pin OE = L)

Using Differential Input Data Interface

for TUSB1105 (Pin MODE = H) and TUSB1106

DATA STATE

VMO

VPO

DATA

LOW SPEED

FULL SPEED

L

L

SE0

X

X

H

L

Differential logic 0

J

K

L

H

Differential logic 1

K

J

H

H

Illegal state

X

X

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Product Folder Link(s): TUSB1105 TUSB1106