SH3301 Datasheet, PDF (3/8 Pages) Semtech Corporation – USB-Adapt™ SH3301 IC Converts PS/2 Data to USB

USB FUNCTIONALITY
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.
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.
PIN DEFINITIONS
Mnemonic
Power Supply
VDD
VSS
VSS1
Reset
_RESET
Oscillator pins
XIN
XOUT
USB
3.3V
D+
D-
PS/2
EPS2CLK0
EPS2DAT0
EPS2CLK1
EPS2DAT1
EPS2EN
Not connected
QFP
Type
5
PWR
9
PWR
6
PWR
12
I
8
I
7
O
34
O
36
I/O
35
I/O
10
I/O
11
I/O
14
I/O
37
I/O
13
O
1-4,
15-33,
38-44
Name and Function
Positive supply voltage
Ground: negative supply voltage
Ground: negative supply voltage
Controller hardware reset pin:
Active-low reset line
Oscillator input: input signal from
oscillator
Oscillator output: output signal to
oscillator
USB reference voltage
USB D+ line
USB D- line
Clock line for external PS/2 port 0
Data line for external PS/2 port 0
Clock line for external PS/2 port 1
Data line for external PS/2 port 1
Enable external PS/2 ports
Not used
Copyright ©1999-2002 Semtech Corporation
3
SH3301-DS-101
www.semtech.com