Miniature Hi-Speed USB Transceiver with 1.8V ULPI Interface

Revision 0.3 (02-04-08)

6

SMSC USB332x

PRODUCT PREVIEW

D2

VDD33

Power

N/A

3.3V Regulator Output. A 2.2uF (<1 ohm

ESR) bypass capacitor to ground is

required for regulator stability. The

bypass capacitor should be placed as

close as possible to the USB332x.

D1

DM

I/O,

Analog

N/A

D- pin of the USB cable.

E1

DP

I/O,

Analog

N/A

D+ pin of the USB cable.

E2

SPK_R

I/O,

Analog

N/A

USB switch in/out for DP signals

E3

SPK_L

I/O,

Analog

N/A

USB switch in/out for DM signals

D3

DATA[7]

I/O,

CMOS

N/A

ULPI bi-directional data bus. DATA[7] is

the MSB.

E4

DATA[6]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

E5

DATA[5]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

D4

DATA[4]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

A5

CLKOUT

Output,

CMOS

N/A

ULPI Clock Out Mode:

60MHz ULPI clock output. All ULPI

signals are driven synchronous to the

rising edge of this clock.

ULPI Clock In Mode:

This pin is connected to VDD18 to

configure 60MHz ULPI Clock IN mode.

D5

DATA[3]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

C4

DATA[2]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

C5

DATA[1]

I/O,

CMOS

N/A

ULPI bi-directional data bus.

B4

DATA[0]

I/O,

CMOS

N/A

ULPI bi-directional data bus. DATA[0] is

the LSB.

B5

NXT

Output,

CMOS

High

The PHY asserts NXT to throttle the data.

When the Link is sending data to the

PHY, NXT indicates when the current

byte has been accepted by the PHY. The

Link places the next byte on the data bus

in the following clock cycle.

A4

DIR

Output,

CMOS

N/A

Controls the direction of the data bus.

When the PHY has data to transfer to the

Link, it drives DIR high to take ownership

of the bus. When the PHY has no data to

transfer it drives DIR low and monitors

the bus for commands from the Link.

Table 1 USB332x Pin Description (continued)

BALL

NAME

DIRECTION/

TYPE

ACTIVE

LEVEL

DESCRIPTION