USS810 View Datasheet(PDF) - Agere -> LSI Corporation

Part Name

Description

Manufacturer

USS810

USB 2.0 Full-Speed/Low-Speed Transceiver

Agere -> LSI Corporation 

Data Sheet, Rev. 6

March 2006

USS810 USB 2.0

Full-Speed/Low-Speed Transceiver

6 Functional Description

6.1 Function Selection

Table 2. Function Table

SUSPND

L

L

H

H

OE

(D+, D–)

RCV

L

Transmitting Active

and Receiving

H

Receiving1

Active

L

High-Z 3

L2

H

High-Z 3

L2

VP/VM

Function

Active Normal transmit (differential receiver active)

Active

Active

Active

Receiving

Transmitting during suspend (differential

receiver inactive)

Low-power state

1. Signal levels on (D+, D–) are determined by other USB devices and external pull-up/down 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. In suspend mode, the D+/D– output is tristated.

6.1 Operating Functions

Table 3. Transmit Function Using Single-Ended Input Data Interface (OE = L)

FSE0

L

L

H

H

VO

Data

L Differential logic 0

H Differential logic 1

L SE0

H SE0

Table 4. Receive Function (OE = H)

(D+, D–)

RCV

VP

VM

Differential Logic 0

L

L

H

Differential Logic 1

H

H

L

SE0

Unknown1

L

L

1. The state of RCV is unknown when FSE0 = 1.

Agere Systems Inc.

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