SH3301.pdf 데이터시트 (총 8 페이지) - 파일 다운로드 SH3301 데이타시트 다운로드

No Preview Available !

USB-Adapt™ SH3301
IC Converts PS/2 Data to USB
HID & SYSTEM MANAGEMENT PRODUCTS, SYSTEM MANAGEMENT FAMILY PRELIMINARY
DESCRIPTION
The USB-Adapt™ SH3301 is a
single IC that converts PS/2
keyboard and mouse data to
USB 1.1.
The USB-Adapt™ is ideal for
system legacy support, enabling
seamless connection of standard
PS/2 devices (mice or keyboards)
to USB.
The IC offers two hot-pluggable
and hot-swappable PS/2 ports;
either port can accept a mouse or
a keyboard. In addition, the USB-
Adapt™ auto-detects and
transparently supports the wheel
function of wheel mice.
FEATURES
• Interfaces PS/2 devices to USB
• Complies with USB 1.1
specification
• Provides two PS/2 ports
• PS/2 ports support mouse wheel
functionality
• Works with standard Windows
keyboard and mouse drivers
APPLICATIONS
• System legacy support
PIN ASSIGNMENTS
• Devices are hot-pluggable
• PS/2 ports are auto-selectable and
hot-swappable – a mouse or
keyboard can be used in either
port
• Easy to implement
• Few external components required
N/C
N/C
N/C
N/C
VDD
VSS1
XOUT
XIN
VSS
EPS2CLK0
EPS2DAT0
1
2
3
4
5
6
7
8
9
10
11
SH3301FB
QFP
33 N/C
32 N/C
31 N/C
30 N/C
29 N/C
28 N/C
27 N/C
26 N/C
25 N/C
24 N/C
23 N/C
Semtech is a registered trademark of Semtech
Corporation. USB-Adapt is a trademark of
Semtech Corporation. All other trademarks
belong to their respective companies.
Copyright ©1999-2002 Semtech Corporation
SH3301-DS-101
1
www.semtech.com

No Preview Available !

BLOCK DIAGRAM
ORDERING CODE
Package options
44-pin QFP
Other Materials
USB-Adapt™ eval. kit
Pitch
0.8 mm
Type
Evaluation kit
TA = -20°C to +85°C
SH3301FB
Order number
EVK-SH3301
System
USB I/O
Keyboard/Mouse
PS/2 Handler
PS2
Port 1
PS2
Port 2
Copyright ©1999-2002 Semtech Corporation
SH3301-DS-101
2
www.semtech.com

No Preview Available !

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
8I
7O
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
SH3301-DS-101
3
www.semtech.com

No Preview Available !

SUGGESTED INTERFACING FOR THE USB-ADAPT™
6
5
23
5
38
39
40
N/C
N/C
N/C
5 VDD
12 RESET
N/C
N/C
N/C
32
33
31
VSS1
VSS
Xout
6
9
7
Xin 8
8
7
Copyright ©1999-2002 Semtech Corporation
SH3301-DS-101
4
8
7
www.semtech.com

No Preview Available !

MECHANICAL INFORMATION FOR THE SH3301FB PACKAGE
13.20 ± 0.30
10.00 ± 0.2
#44
#1
1.00
+ 0.10
0.35 - 0.05
0.80
0~8°
0.15–+
0.1
0.05
0.1 MAX
0.0 MIN
2.05 ± 0.1
2.30 MAX
Copyright ©1999-2002 Semtech Corporation
SH3301-DS-101
5
www.semtech.com