AU9228 USB KVM Controller Technical Reference Manual AU9228 USB KVM Controller Copyright 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. Trademark Acknowledgements The company and product names mentioned in this document may be the trademarks or registered trademarks of their manufacturers. Disclaimer Alcor 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. Revision History Date Revision Description July 2007 1.00W Official release Oct 2007 1.01W Modify “3.0 Pin Assignment” Contact Information: Web site: http://www.alcormicro.com/ Taiwan Alcor Micro, Corp. 4F, No 200 Kang Chien Rd., Nei Hu, Taipei, Taiwan, R.O.C. Phone: 886-2-8751-1984 Fax: 886-2-2659-7723 China ShenZhen Office Rm.2407-08, Industrial Bank Building No.4013, Shennan Road, ShenZhen,China. 518026 Phone: (0755) 8366-9039 Fax: (0755) 8366-9101 Santa Clara Office 2901 Tasman Drive, Suite 206 Santa Clara, CA 95054 USA Phone: (408) 845-9300 Fax: (408) 845-9086 Los Angeles Office 9070 Rancho Park Court Rancho Cucamonga, CA 91730 USA Phone: (909) 483-8821 Fax: (909) 944-0464 <Memo> 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 ....... 8 4.1 AU9228 Block Diagram ...............................................................8 5. Hot Key Definition .................................................. 9 5.1 [Scroll]++[Scroll] mode ...............................................................9 5.2 [Caps]++[Caps] mode..................................................................9 5.3 [Num]++[Num] Mode ...................................................................10 5.4 [Ctrl]+[Shift] mode (left-hand side) ............................................10 6. Electrical Characteristics ...................................... 12 6.1 Recommended Operating Conditions .......................................12 6.2 General DC Characteristics ........................................................12 6.3 DC Electrical Characteristics of 3.3V I/O Cells..........................12 6.4 Crystal Oscillator Circuit Setup for Characterization ...............13 6.5 ESD Test Results.........................................................................13 6.6 Latch-Up Test Results.................................................................14 7. Mechanical Information ......................................... 16 7. Abbreviations ......................................................... 17 i List of Figures Figure 2.1 Block Diagram..................................................................2 Figure 3.1 Pin Assignment Diagram ................................................3 Figure 4.1 AU9228 Block Diagram ...................................................8 Figure 6.1 Crystal Oscillator Circuit Setup for Characterization ...13 Figure 6.2 Latch-Up Test Circuits ....................................................15 Figure 7.1 Mechanical Information Diagram ...................................16 List of Tables Table 3.1 Pin Descriptions ................................................................4 Table 6.1 Recommended Operating Conditions .............................12 Table 6.2 General DC Characteristics ..............................................12 Table 6.3 DC Electrical Characteristics of 3.3V I/O Cells ...............12 Table 6.4 ESD Data ............................................................................13 Table 6.5 Latch–Up Data ...................................................................15 ii 1. Introduction 1.1 Description AU9228 is a highly integrated single chip USB KVM controller offering users the possibility of sharing keyboard, mouse and monitor among up to four PCs. Not like traditional PS2 KVM devices, AU9228 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 AU9228 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. 1.2 Features Fully USB v1.1 specification compliant Support USB bus power and device self power Support up to 4 PCs via 4 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 4 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 AU9228 USB KVM Controller V1.01W 1 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 PC 1 PC 2 PC 4 PC 3 USB cable USB cable USB cable Monitor Cable Monitor cable Monitor cable USB cable Selection (6x) Monitor and Audio swtiching box (Relay device ) Port 2 Port 1 AU9228 KVM Auto-swtich mode default button x 5 Keyboard 2 Audio Devices PS2 Keyboard Mouse Monitor AU9228 USB KVM Controller V1.01W 3. Pin Assignment The AU9228 is delivered in 64pin 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. UP1LEDN UPUSB4_DM UPUSB4_DP UPUSB3_DM UPUSB3_DP UPUSB2_DM UPUSB2_DP UPUSB1_DM 60 59 58 57 56 55 54 UPUSB1_DP UP2LEDN 61 D4 62 D5 63 D6 64 D7 BVSS UP3LEDN Figure 3.1 Pin Assignment Diagram 53 52 51 50 49 1 48 D3 AVCC 2 47 MONITOREN1 AVSS 3 46 MONITOREN0 XTAL1 4 45 RESERVED XTAL2 5 44 RESERVED VCC5V 6 43 GPO0 BVCC 7 42 GPO1 41 GPO2 UP4LEDN AU9228 BVSS 8 SWITCHN 9 40 D2 AUDIOSWITCHN 10 39 D1 BUS_PWRD 11 38 D0 BEEP 12 37 PS2_DAT INTN 13 36 PS2_CLK GND 14 35 RESERVED GND 15 34 RESERVED SYS1BUTTONN 16 33 SWITCHMODE2 22 23 24 25 26 27 ALE SYS2BUTTONN SYS3BUTTONN SYS4BUTTONN CSN RDN DOWNUSB2_DP DOWNUSB2_DM DOWNUSB1_DP DOWNUSB1_DM WRN AU9228 USB KVM Controller V1.01W 28 29 30 31 32 SWITCHMODE1 21 SWITCHMODE0 20 VCC 19 EXTCPUMOD 18 VSS 17 3 Table 3.1 Pin Descriptions Pin # Pin Name I/O 1 UP4LEDN O 2 AVCC PWR 3.3V analog input power 3 AVSS PWR Analog ground 4 XTAL1 I 12 MHz crystal input 5 XTAL2 O 12 MHz crystal output 6 VCC5V PWR 5.0V input power from USB port 7 BVCC PWR 3.3V output power from internal regulator 8 BVSS PWR Ground pin of internal regulator 9 SWITCHN I 10 AUDIOSWITCHN I 11 BUS_PWRD I 12 BEEP O 13 INTN O 14 GND Ground 15 GND Ground 16 SYS1BUTTONN I 17 ALE I 18 SYS2BUTTONN I 19 SYS3BUTTONN I 20 SYS4BUTTONN I 21 CSN I 22 RDN I 23 DOWNUSB2_DP I/O 4 Description System 4 LED indicator (0:ON; 1:OFF) Button with internal pull-up for switching to next system (0: Enable; 1: Normal) Audio ON/OFF switch with internal pull-up (1: OFF; 0: ON) Bus power selection (1: Device Self Power; 0: Bus Power) Audio output (4 KHz frequency) when system switches Interrupt signal output to external MCU when SWITCHMODE2='1' and EXTCPUMOD='1' (falling-edge triggered) Panel button with internal pull-up for enabling system 1 (0: Enable; 1: Normal) 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) Panel button with internal pull-up for enabling system 2 (0: Enable; 1: Normal) Panel button with internal pull-up for enabling system 3 (0: Enable; 1: Normal) Panel button with internal pull-up for enabling system 4 (0: Enable; 1: Normal) Chip enable for the MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1' (0: Enable) Read strobe for the MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1' (0: Enable) DownPort2 DP AU9228 USB KVM Controller V1.01W Pin # Pin Name I/O 24 DOWNUSB2_DM I/O DownPort2 DM 25 DOWNUSB1_DP I/O DownPort1 DP 26 DOWNUSB1_DM I/O 27 WRN I 28 EXTCPUMOD I 29 VSS PWR DownPort1 DM Read strobe for the MCU interface when SWITCHMODE2='1' and EXTCPUMOD ='1' (0: Enable; 1: Normal) External MCU mode selection (1: Parallel; 0: Serial). Serial is the default mode. Digital ground 30 VCC PWR 31 SWITCHMODE0 I 32 SWITCHMODE1 I 33 SWITCHMODE2 I 34 RESERVED 3.3V digital input power Switch mode selection (SW0, SW1) for internal hotkey mode when SWITCHMODE2='0' and D2='0', it’s defined as: (0, 0): [Scroll][Scroll] mode (default) (0, 1): [Caps Lock][Caps Lock] mode (1, 0): [Num Lock][Num Lock] mode (1, 1): [Ctrl][Shift] mode (left-hand side) Enable external MCU mode (1: Enable; 0: Disable). Disable is the default setting. Reserved 35 RESERVED Reserved 36 PS2_CLK I/O PS2 clock signal (external pull-up required) 37 PS2_DAT I/O PS2 data signal (external pull-up required) 38 D0 I/O 39 D1 I/O 40 D2 I/O AU9228 USB KVM Controller V1.01W Description Bit 0 with internal pull-up in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1'. It also provides alternative functions: I2C bus SDA signal (slave mode) when SWITCHMODE2='1' and EXTCPUMOD='0' I2C bus SDA signal (master mode) when SWITCHMODE2='0' and D2='1' Bit 1 with internal pull-up in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1'. It also provides alternative functions: I2C bus SCL signal (slave mode) when SWITCHMODE2='1' and EXTCPUMOD='0' I2C bus SCL signal (master mode) when SWITCHMODE2='0' and D2='1' Bit 2 with internal pull-down in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1'. It also provides alternative functions: I2C bus address 0 (slave mode) when SWITCHMODE2='1' and EXTCPUMOD='0' I2C bus master mode enable bit when SWITCHMODE2='0' 5 Pin # Pin Name I/O 41 GPO2 O General purpose output pin 2 42 GPO1 O General purpose output pin 1 43 GPO0 O General purpose output pin 0 44 RESERVED Reserved 45 RESERVED Reserved 46 MONITOREN0 O 47 MONITOREN1 O 48 D3 I/O 49 D4 I/O 50 D5 I/O 51 D6 I/O 52 D7 I/O 53 UPUSB1_DP I/O Upstream port 1 DP 54 UPUSB1_DM I/O Upstream port 1 DM 55 UPUSB2_DP I/O Upstream port 2 DP 56 UPUSB2_DM I/O Upstream port 2 DM 57 UPUSB3_DP I/O Upstream port 3 DP 58 UPUSB3_DM I/O Upstream port 3 DM 59 UPUSB4_DP I/O Upstream port 4 DP 60 UPUSB4_DM I/O Upstream port 4 DM 61 UP1LEDN O System 1 LED indicator (0:ON; 1:OFF) 62 UP2LEDN O System 2 LED indicator (0:ON; 1:OFF) 6 Description Monitor selection (MON0, MON1): (0, 0) : monitor 1 select (1, 0) : monitor 2 select (0, 1) : monitor 3 select (1, 1) : monitor 4 select Bit 3 with internal pull-down in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1'. It also provides alternative function: I2C bus address 1 (slave mode) when SWITCHMODE2='1' and EXTCPUMOD='0' Bit 4 with internal pull-down in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1'. It also provides alternative function: I2C bus address 2 (slave mode) when SWITCHMODE2='1' and EXTCPUMOD='0' Bit 5 with internal pull-down in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1' Bit 6 with internal pull-down in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1' Bit 5 with internal pull-down in address/data bus of MCU interface when SWITCHMODE2='1' and EXTCPUMOD='1' AU9228 USB KVM Controller V1.01W Pin # Pin Name I/O 63 UP3LEDN O 64 BVSS PWR AU9228 USB KVM Controller V1.01W Description System 3 LED indicator (0:ON; 1:OFF) Ground pin of internal regulator 7 4. System Architecture and Reference Design 4.1 AU9228 Block Diagram Figure 4.1 AU9228 Block Diagram Host 1 Host 2 Host 3 Host 4 USB Protocol Engine USB Protocol Engine USB Protocol Engine USB Protocol Engine Downstream Port Downstream Port Downstream Port Downstream Port Downstream Port Data Checker Downstream Port Data Multiplexor Switch Detection port 1: USB Keyboard; port 2: USB Mouse; PS2 port: PS2 Keyboard 8 AU9228 USB KVM Controller V1.01W 5. Hot Key Definition AU9228 supports 4 sets of “Hot Key” to help users to switch PC, rapidly and easily, via hot key sequence defined using keypads on the left hand side of a keyboard. 5.1 [Scroll]++[Scroll] mode Hot Key Definition [Scroll] ++ [Scroll] + 1 (note1) Switch to PC1 [Scroll] ++ [Scroll] + 2 Switch to PC2 [Scroll] ++ [Scroll] + 3 Switch to PC3 [Scroll] ++ [Scroll] + 4 Switch to PC4 [Scroll] ++ [Scroll] + → or ↓ Switch to Next PC [Scroll] ++ [Scroll] + ← or ↑ Switch to Previous PC [Scroll] ++ [Scroll] + B [Scroll]++[Scroll]+F1~F8 Beeper ON/OFF (note2) Auto-scan mode every 10 second. ([ESC] switch to regular key code) Set Auto-scan rate (note3). ([ESC) switch to regular key code) Customer define key (note4). [Scroll]++[Scroll]+[Caps] Switch to [Caps]++[Caps] hot key mode [Scroll]++[Scroll]+[Num] Switch to [Num]++[Num] hot key mode [Scroll]++[Scroll]+[Ctrl] Switch to [Ctrl]+[Shift] hot key mode [Scroll] ++ [Scroll] + S [Scroll] ++ [Scroll] + S + n 5.2 [Caps]++[Caps] mode Hot Key Definition [Caps]++[Caps]+1 Switch to PC1 [Caps]++[Caps]+2 Switch to PC2 [Caps] ++ [Caps] + 3 Switch to PC3 [Caps] ++ [Caps] + 4 Switch to PC4 [Caps]++[Caps]+→ or ↓ Switch to Next PC [Caps]++[Caps]+← or ↑ Switch to Previous PC [Caps]++[Caps]+B [Caps]++[Caps]+F1~F8 Beeper ON/OFF (note2) Auto-scan mode every 10 second. ([ESC] switch to regular key code) Set Auto-scan rate (note3). ([ESC] switch to regular key code) Customer define key (note4) [Caps]++[Caps]+[Scroll] Switch to [Scroll]++[Scroll] hot key mode [Caps]++[Caps]+[Num] Switch to [Num]++[Num] hot key mode [Caps]++[Caps]+[Ctrl] Switch to [Ctrl]+[Shift] hot key mode [Caps]++[Caps]+S [Caps]++[Caps]+S + n AU9228 USB KVM Controller V1.01W 9 5.3 [Num]++[Num] Mode Hot Key Definition [Num]++[Num]+1 Switch to PC1 [Num]++[Num]+2 Switch to PC2 [Num] ++ [Num] + 3 Switch to PC3 [Num] ++ [Num] + 4 Switch to PC4 [Num]++[Num]+→ or ↓ Switch to Next PC [Num]++[Num]+← or ↑ Switch to Previous PC [Num]++[Num]+B [Num]++[Num]+F1~F8 Beeper ON/OFF (note2) Auto-scan mode every 10 second. ([ESC] switch to regular key code) Set Auto-scan rate (note3). ([ESC] switch to regular key code) Customer define key (note4) [Num]++[Num]+[Scroll] Switch to [Scroll]++[Scroll] hot key mode [Num]++[Num]+[Caps] Switch to [Caps]++[Caps] hot key mode [Num]++[Num]+[Ctrl] Switch to [Ctrl]+[Shift] hot key mode [Num]++[Num]+S [Num]++[Num]+S + n 5.4 [Ctrl]+[Shift] mode (left-hand side) Hot Key Definition [Ctrl]++[Ctrl] Switch to next live PC [Ctrl + Shift + 1] Switch to PC1 [Ctrl + Shift + 2] Switch to PC2 [Ctrl + Shift + 3] Switch to PC3 [Ctrl + Shift + 4] Switch to PC4 [Ctrl + Shift + → or ↓] Switch to Next PC [Ctrl + Shift + ← or ↑] Switch to Previous PC [Ctrl + Shift + B] Beeper ON/OFF (note2) [Ctrl + Shift + F1~F8] Auto-scan mode every 10 second. ([ESC] switch to regular key code) Set Auto-scan rate (note3). ([ESC] switch to regular key code) Customer define key (note4) [Ctrl + Shift + Scroll] Switch to [Scroll]++[Scroll] hot key mode [Ctrl + Shift + Caps] Switch to [Caps]++[Caps] hot key mode [Ctrl + Shift + Num] Switch to [Num]++[Num] hot key mode [Ctrl + Shift + S] [Ctrl + Shift + S + n] Note 1: “++” means press key rapidly, “[Scroll]++[Scroll]+1” means press “Scroll” twice rapidly and then press “1”. If system receives “Scroll ++ Scroll” command only, system will reset the buffer when it does not receive any input comes after within a defined interval of time (say, 5 seconds). 10 AU9228 USB KVM Controller V1.01W Note 2: Audible feedback when beeper is ON and keep the device in silent mode when beeper is OFF. Note 3: n = number from 1 to 9, each represents 5 seconds’ interval latency to 60 seconds correspondingly. Auto-scan rate set 【N】number 1 2 3 4 5 6 7 8 9 Second 5 10 15 20 25 30 35 40 60 Note 4: Function key +F1 Function key +F2 Function key +F3 Function key +F4 Function key +F5 Function key +F6 Function key +F7 Function key +F8 AU9228 USB KVM Controller V1.01W GPO 2 0 0 0 0 1 1 1 1 GPO 1 0 0 1 1 0 0 1 1 GPO 0 0 1 0 1 0 1 0 1 11 6. Electrical Characteristics 6.1 Recommended Operating Conditions Table 6.1 Recommended Operating Conditions SYMBOL PARAMETER MIN TYP MAX UNITS VCC Power Supply 4.75 5 5.25 V VIN Input Voltage 0 VCC V TORP Operating Temperature 0 85 OC TSTG Storage Temperature -40 125 OC 6.2 General DC Characteristics Table 6.2 General DC Characteristics SYMBOL PARAMETER CONDITIONS IIL Input low current IIH Input high current OZ Tri-state leakage current CIN Input capacitance 5 ρF COUT Output capacitance 5 ρF CBID Bi-directional buffer capacitance 5 ρF no pull-up or pull-down no pull-up or pull-down MIN TYP MAX UNITS -1 1 µA -1 1 µA -10 10 µA 6.3 DC Electrical Characteristics of 3.3V I/O Cells Table 6.3 DC Electrical Characteristics of 3.3V I/O Cells Limits SYMBOL PARAMETER CONDITIONS UNIT MIN TYP MAX 12 VIL Input Low Voltage CMOS VIH Input Hight Voltage CMOS VOL Output low voltage IOL=4mA, 16mA VOH Output high voltage IOH=4mA,16mA RI Input Pull-up/down resistance Vil=0V or Vih=VCC 0.9 2.3 V V 0.4 2.4 V V 10k/20 0k AU9228 USB KVM Controller V1.01W KΩ 6.4 Crystal Oscillator Circuit Setup for Characterization The following setup was used to measure the open loop voltage gain for crystal oscillator circuits. The feedback resistor serves to bias the circuit at its quiescent operating point and the AC coupling capacitor, Cs, is much larger than C1 and C2. Figure 6.1 Crystal Oscillator Circuit Setup for Characterization 6.5 ESD Test Results Test Description: ESD Testing was performed on a Zapmaster system using the Human-Body –Model (HBM) and Machine-Model (MM), according to MIL_STD 883 and EIAJ IC_121 respectively. Human-Body-Model stress devices by sudden application of a high voltage supplied by a 100 PF capacitor through 1.5 Kohm resistance. Machine-Model stresses devices by sudden application of a high voltage supplied by a 200 PF capacitor through very low (0 ohm) resistance Test circuit & condition Zap Interval : 1 second Number of Zaps : 3 positive and 3 negative at room temperature Critera : I-V Curve Tracing Table 6.4 ESD Data Model Model S/S TARGET Results HBM MM Vdd, Vss, I/C Vdd, Vss, I/C 15 15 2000V 200V TBD TBD AU9228 USB KVM Controller V1.01W 13 6.6 Latch-Up Test Results Test Description: Latch-Up testing was performed at room ambient using an IMCS-4600 system which applies a stepped voltage to one pin per device with all other pins open except Vdd and Vss which were biased to 5 Volts and ground respectively. Testing was started at 5.0 V (Positive) or 0 V(Negative), and the DUT was biased for 0.5 seconds. If neither the PUT current supply nor the device current supply reached the predefined limit (DUT=0 mA , Icc=100 mA), then the voltage was increased by 0.1 Volts and the pin was tested again. This procedure was recommended by the JEDEC JC-40.2 CMOS Logic standardization committee. Notes: 1. DUT: Device Under Test. 2. PUT: Pin Under Test. Icc Measurement m 1 Source + Untested Input Tied to V supply Vcc Pin Pin under under test test DUT V Supply Untested Output Open Circuit + GND Trigger Source Test Circuit : Positive Input/ output Overvoltage /Overcurrent 14 AU9228 USB KVM Controller V1.01W Icc M easurem ent mA 1 Source + V Supply Vcc Pin under test Untested Input Tied to V supply + Untested Output O pen Circuit DUT GND Trigger Source Test Circuit: Negative Input/Output Overvoltage/Overcurrent Icc Measurement mA V Supply Vcc All Input Tied to V supply Untested Output Open Circuit DUT + GND Supply voltage Test Figure 6.2 Latch-Up Test Circuits Model Model Voltage (v)/ Current (mA) 11.0 11.0 200 200 9.0 + Voltage + Current Vdd-Vxx S/S Results 5 TBD 5 TBD 5 TBD Table 6.5 Latch–Up Data AU9228 USB KVM Controller V1.01W 15 7. Mechanical Information Figure 7.1 Mechanical Information Diagram E 0.25 E1 GAUGE PLANE A1 SEATING PLANE D D1 L L1 C1 b SYMBOLS A A1 A2 b c1 D D1 E E1 e L L1 16 MIN. MAX. -1.60 0.05 0.15 1.35 1.45 0.17 0.27 0.09 0.16 12.00 BSC 10.00 BSC 12.00 BSC 10.00 BSC 0.50 BSC 0.45 0.75 1.00 REF A2 A e 1. JEDEC OUTLINE: MS-026 BCD 2. DIMENSIONS D1 AND E1 DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE PROTRUSION IS 0.25mm PER SIDE. D1 AND E1 ARE MAXIMUM PLASTIC BODY SIZE DIMENSIONS INCLUDING MOLD MISMATCH. 3. DIMENSION b DOES NOT INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHEALL NOT CAUSE THE LEAD WIDTH TO EXCEED THE MAXIMUM b DIMENSION BY MORE THAN 0.08mm. AU9228 USB KVM Controller V1.01W 7. Abbreviations In this chapter some of the terms and abbreviations used throughout the technical reference manual are listed as follows. SIE UTMI Serial Interface Engine USB Transceiver Macrocell Interface About Alcor Micro, Corp. Alcor Micro, Corp. designs, develops and markets highly integrated and advanced peripheral semiconductor, and software driver solutions for the personal computer and consumer electronics markets worldwide. We specialize in USB solutions and focus on emerging technology such as USB and IEEE 1394. The company offers a range of semiconductors including controllers for USB hub, integrated keyboard/USB hub and USB Flash memory card reader…etc. Alcor Micro, Corp. is based in Taipei, Taiwan, with sales offices in Taipei, Japan, Korea and California. Alcor Micro is distinguished by its ability to provide innovative solutions for spec-driven products. Innovations like single chip solutions for traditional multiple chip products and on-board voltage regulators enable the company to provide cost-efficiency solutions for the computer peripheral device OEM customers worldwide. AU9228 USB KVM Controller V1.01W 17