SH3301FB datasheet(3/8 Pages) SEMTECH

3 / 8 page

USB FUNCTIONALITY

PIN DEFINITIONS

SH3301-DS-101

www.semtech.com

The USB-Adapt™ is a low-speed

composite USB 1.1 device that

interfaces PS/2. It supports the

USB Human Interface Devices

(HID) class specification. It uses

two interrupt endpoints for the PS/2

devices.

The USB-Adapt™ handles the

merging of all this data, and sends

the data to the host system.

Mnemonic

QFP

Type

Name and Function

Power Supply

VDD

PWR

Positive supply voltage

VSS

PWR

Ground: negative supply voltage

VSS1

PWR

Ground: negative supply voltage

Reset

_RESET

Controller hardware reset pin:

Active-low reset line

Oscillator pins

XIN

Oscillator input: input signal from

oscillator

XOUT

Oscillator output: output signal to

oscillator

USB

3.3V

USB reference voltage

D+

I/O

USB D+ line

D-

I/O

USB D- line

PS/2

EPS2CLK0

I/O

Clock line for external PS/2 port 0

EPS2DAT0

I/O

Data line for external PS/2 port 0

EPS2CLK1

I/O

Clock line for external PS/2 port 1

EPS2DAT1

I/O

Data line for external PS/2 port 1

EPS2EN

Enable external PS/2 ports

Not connected

1-4,

Not used

15-33,

38-44

PS/2 PORTS

The two PS/2 ports allow the user

to connect legacy PS/2 devices to

the USB host system. Standard

104-key keyboards and PS/2 mice,

with support for MouseWheel

functionality, can be hot-plugged at

either of the PS/2 ports and

immediately begin communicating

with the host.

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