Alcor Micro AU9226 Product manual

AU9226
USB KVM Controller
Technical Reference Manual

AU9226
USB KVM Controller

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Co op py yr ri ig gh ht t
Copyright © 1997 - 2007. Alcor Micro, Corp. All Rights Reserved. No part of this data
sheet may be reproduced, transmitted, transcribed, stored in a retrieval system or
translated into any language or computer language, in any form or by any means,
electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without prior
written permission from Alcor Micro, Corp.
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Tr ra ad de em ma ar rk k A Ac ck kn no ow wl le ed dg ge em me en nt ts s
The company and product names mentioned in this document may be the trademarks
or registered trademarks of their manufacturers.
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Di is sc cl la ai im me er r
A
lcor Micro, Corp. reserves the right to change this product without prior notice. Alcor
Micro, Corp. makes no warranty for the use of its products and bears no responsibility
for any error that appear in this document. Specifications are subject to change
without prior notice.
R
Re ev vi is si io on n H Hi is st to or ry y
Date Revision Description
July 2007 1.00W Official release
Oct 2007 1.01W Modify “3.0 Pin Assignment”
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Co on nt ta ac ct t I In nf fo or rm ma at ti io on n: :
Web site: http://www.alcormicro.com/
Taiwan China ShenZhenOffice
Alcor Micro, Corp. Rm.2407-08, Industrial Bank Building
4F, No 200 Kang Chien Rd., Nei Hu, No.4013, Shennan Road,
Taipei, Taiwan, R.O.C. ShenZhen,China. 518026
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]
Santa Clara Office Los Angeles Office
2901 Tasman Drive, Suite 206 9070 Rancho Park Court
Santa Clara, CA 95054 Rancho Cucamonga, CA 91730
USA USA
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]

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Table of Contents
1. Introduction ............................................................ 1
1.1 Description...................................................................................1
1.2 Features........................................................................................1
2. Application Block Diagram ...................................2
3. Pin Assignment...................................................... 3
4. System Architecture and Reference Design ....... 7
4.1 AU9226 Block Diagram ...............................................................7
5. Hot Key Definition.................................................. 8
5.1 [Scroll]++[Scroll] mode...............................................................8
5.2 [Caps]++[Caps] mode..................................................................8
5.3 [Num]++[Num] Mode ...................................................................9
5.4 [Ctrl]+[Shift] mode (left-hand side) ............................................9
6. Electrical Characteristics...................................... 11
6.1 Recommended Operating Conditions .......................................11
6.2 General DC Characteristics........................................................11
6.3 DC Electrical Characteristics of 3.3V I/O Cells..........................11
6.4 Crystal Oscillator Circuit Setup for Characterization...............12
6.5 ESD Test Results.........................................................................12
6.6 Latch-Up Test Results.................................................................13
7. Mechanical Information......................................... 15
7. Abbreviations ......................................................... 16

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List of Figures
Figure 2.1 Block Diagram..................................................................2
Figure 3.1 Pin Assignment Diagram ................................................3
Figure 4.1 AU9226 Block Diagram ...................................................7
Figure 6.1 Crystal Oscillator Circuit Setup for Characterization...12
Figure 6.2 Latch-Up Test Circuits ....................................................14
Figure 7.1 Mechanical Information Diagram ...................................15
List of Tables
Table 3.1 Pin Descriptions................................................................4
Table 6.1 Recommended Operating Conditions.............................11
Table 6.2 General DC Characteristics..............................................11
Table 6.3 DC Electrical Characteristics of 3.3V I/O Cells ...............11
Table 6.4 ESD Data............................................................................12
Table 6.5 Latch–Up Data...................................................................14

AU9226 USB KVM Controller V1.01W 1
1. Introduction
1
1. .1 1 D De es sc cr ri ip pt ti io on n
AU9226 is a highly integrated single chip USB KVM controller offering users the
possibility of sharing keyboard, mouse and monitor among up to two PCs. Not like
traditional PS2 KVM devices, AU9226 uses USB as its upstream and downstream
interface to support its driver-free and plug-n-play features, which allow users to easily
install and use the KVM.
Typical application of AU9226 is under an environment, in which only one set of
monitor, keyboard and mouse is available. Applying such kind of devices in a
computing environment will not only result in a centralized control, but also reduce the
power and space consumption.
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1. .2 2 F Fe ea at tu ur re es s
 Fully USB v1.1 specification compliant
 Support USB bus power and device self power
 Support up to 2 PCs via 2 USB upstream ports
 Support USB downstream port 1 for USB keyboard
 Support USB downstream port 2 for USB mouse
 Support PS2 keyboard
 Support both “panel button” and “hot key” to switch among PCs
 Support “auto-scan” mode for users to monitor PCs easily
 Support audio beep when system switches
 Support upstream port selected LED indicators for each PC respectively
 Support phantom keyboard to let user does not need to configure BIOS to turn
on “No halt on error”
 Support 2 different sets of key sequence to switch among PCs (Please see the
key definition in the following)
 Recalls “Caps Lock”, “Num Lock” and “Scroll Lock” keys’ status for each PC
automatically
 Output the monitor selection signals to the external video-switching circuits
 Support 8-bit MCU interface to provide control from external MCU
 Support serial MCU interface to provide control from external MCU
 No need to install device driver under Windows, Macintosh, Linux, FreeBSD
and Sun system
 Support EEPRom to memorize hotkey mode

2. Application Block Diagram
Typical application is in a computing environment where it demands a centralized
control and space & energy saving is critical.
Figure 2.1 Block Diagram
AU9226 KVM
Port 1
Por t 2
Monitor and Audio
swtiching box
(Relay device )
Monitor
PC 2
PC 1
Mouse
Keyboard
Monitor cable
USB cable USB cable Monitor Cable
Selection (3x)
default button x 1
Auto-swtich mode
PS2 Keyboard Audio Devices
AU9226 USB KVM Controller V1.01W
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3. Pin Assignment
The AU9226 is delivered in 48pin LQFP form factor. Documented below is a figure
shows signal names of each pin and a table in the following page describes each pin
in more details.
Figure 3.1 Pin Assignment Diagram
AVCC
AVSS
XTAL1
XTAL2
VCC5V
BVCC
BVSS
SWITCHN
AUDIOSWITCHN
BUS_PWRD
BEEP
INTN VCC
SWITCHMODE0
SWITCHMODE1
PS2_CLK
PS2_DAT
GPO1
GPO0
GPO2
VSS
DOWNUSB1_DP
DOWNUSB2_DM
WRN DOWNUSB1_DM
RDN CSN GND ALE DOWNUSB2_DP
GND
MONITOREN0
D7
UPUSB1_DP
UPUSB1_DM
UPUSB2_DP
UPUSB2_DM
UP1LEDN
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15 16 17 18 19 20 21 22 23 24
25
26
27
28
29
30
31
32
33
35
36
34
373839404142434445464748
AU9226
SWITCHMODE2
EXTCPUMOD
D0
D1
D2
D5 D4 D3 D6
UP2LEDN
AU9226 USB KVM Controller V1.01W 3

Table 3.1 Pin Descriptions
Pin # Pin Name I/O Description
1 AVCC PWR 3.3V analog input power
2 AVSS PWR Analog ground
3 XTAL1 I 12 MHz crystal input
4 XTAL2 O 12 MHz crystal output
5 VCC5V PWR 5.0V input power from USB port
6 BVCC PWR 3.3V output power from internal regulator
7 BVSS PWR Ground pin of internal regulator
8 SWITCHN I Button with internal pull-up for switching to next
system (0: Enable; 1: Normal)
9 AUDIOSWITCHN I Audio ON/OFF switch with internal pull-up (1:
OFF; 0: ON)
10 BUS_PWRD I Bus power selection (1: Device Self Power; 0: Bus
Power)
11 BEEP O Audio output (4 KHz frequency) when system
switches
12 INTN O Interrupt signal output to external MCU when
SWITCHMODE2='1' and EXTCPUMOD='1'
(falling-edge triggered)
13 GND Ground
14 GND Ground
15 ALE I
When not using external parallel MCU, it should be
pulled down. Address latch enable when
SWITCHMODE2='1' and EXTCPUMOD='1' (1: AD
bus is address; 0: AD bus is data)
16 CSN I Chip enable for the MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1' (0:
Enable)
17 RDN I Read strobe for the MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1' (0:
Enable)
18 DOWNUSB2_DP I/O DownPort2 DP
19 DOWNUSB2_DM I/O DownPort2 DM
20 DOWNUSB1_DP I/O DownPort1 DP
21 DOWNUSB1_DM I/O DownPort1 DM
22 WRN I Read strobe for the MCU interface when SWITCHMODE2='1' and EXTCPUMOD ='1' (0:
Enable; 1: Normal)
23 EXTCPUMOD I External MCU mode selection (1: Parallel; 0:
Serial). Serial is the default mode.
24 VSS PWR Digital ground
AU9226 USB KVM Controller V1.01W
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