Alcor Micro AU9462 Product manual

AU9462
USB Keyboard Hub Controller
Technical Reference Manual
Revision 1.1
© 2003 Alcor Micro Corp.
All Rights Reserved

Copyright Notice
Copyright 1998 - 2003
Alcor Micro Corp.
All Rights Reserved.
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.
Contact Information:
Web site: http://www.alcormicro.com/
Taiwan
Alcor Micro Corp.
4F-1, No 200,Kang Chien Rd., Nei Hu,
Taipei, Taiwan, R.O.C.
Phone: [phone]
Fax: [phone]
Santa Clara Office Los Angeles Office
2901 Tasman Drive, Suite 206 9400 Seventh St., Bldg. A2
Santa Clara, CA 95054 Rancho Cucamonga, CA 91730
USA USA
Phone: [phone] Phone: [phone]
Fax: [phone] Fax: [phone]

TABLE F CONTENTS i
Table of Contents
1.0 Introduction------------------------------------------------------------------------------------------ 1
1.1 Description--------------------------------------------------------------------------------------- 1
1.2 Features------------------------------------------------------------------------------------------ 1
2.0 Application Block Diagram---------------------------------------------------------------------- 3
3.0 Pin Assignments------------------------------------------------------------------------------------ 5
4.0 System Architecture and Reference Design---------------------------------------------- 9
4.1 AU9462 Block Diagram----------------------------------------------------------------------- 9
4.2 Sample Schematics----------------------------------------------------------------------------- 10
4.3 AU9462 Keyboard ERPOM Sample Value----------------------------------------------- 12
5.0 Electrical Characteristics------------------------------------------------------------------------ 19
5.1 Recommended Operating Conditions------------------------------------------------------ 19
5.2 General DC Characteristics------------------------------------------------------------------ 19
5.3 DC Electrical Characteristic for 3.3 volts operation------------------------------------ 19
5.4 Crystal Oscillator Circuit Setup for Characteristics------------------------------------ 20
5.5 ESD Test Results------------------------------------------------------------------------------- 21
5.6 Latch-Up Test Results------------------------------------------------------------------------- 22
6.0 Mechanical Information-------------------------------------------------------------------------- 25
7.0 Errata -------------------------------------------------------------------------------------------------- 27

TABLE F CONTENTS i

INTRODUCTION 1
1.0 Introduction
1.1 Description
The AU9462 is an integrated low cost single chip USB keyboard controller with 2-port hub.
It supports the 19 x 8 keyboard matrix. Each key can be individually programmed for
standard key code, ACPI or multimedia usage. It also supports combinational key definitions
in the standard 19 x 8 key matrix.
Separated ACPI key is a special feature offered by AU9462. There is one pin dedicated for
all-in-one ACPI function. Fn key function is designed to enable selection of alternative
matrix for small size keyboard application.
The USB descriptors and keyboard matrix can be customized via an optional external 24C08
EEPROM, or directly select the internal ROMs for 8 different model keyboards. This feature
makes customization of new projects cost-effective and efficient by adding an optional
external EEPROM while still using the same chip for mass production. Alcor also provides
utility program to simplify EEPROM contents programming.
The USB downstream ports can be used to connect various USB peripheral devices, such as
USB printer, modem, scanner, camera, mouse and joystick to the system without adding
external glue logic. Multimedia and shortcut keys can support volume control, CD/DVD
Play/Pause, Stop, Eject, Mute and general purpose shortcut keys such as Internet, e-mail and
help.
1.2 Features
• Fully compliant with the Universal Serial Bus Specification, version 1.1
• USB keyboard design is compliant with USB Device Class Definition for Human
Interface Devices (HID), version 1.1
• Built-in 3.3v voltage regulator allows single +5V operating voltage drawing directly from
USB bus
• Intergrated USB full speed transceiver
• Support for 19 x 8 standard key matrix. An Fn pin to select alternative matrix. Each
matrix location is flexible to be used as standard or any report ID & usage page code.
• Support separate ACPI keys. One pin dedicated for all-in-one ACPI function
• Each key can be individually programmed for standard key code, ACPI or multimedia
usage
• Ability to configure the generic LEDs to blink on and off at a rate of 512ms.
• Additional LED1 and LED2.

INTRODUCTION 2
• An additional LED2 for suspend special usage which will be turned on in suspend or can
be defined by vendors
• Fn key toggles or selectable based on a configuration bit
• Extended delay key debounce timing option for any keys defined.
• USB vendor ID, product ID, and keyboard scan code table can be customized via
optional external EEPROM.
• Contains 8K byte ROM to support 8 different keyboard models
• Runs at 12 Mhz frequency
• Integrated dual port power switch to eliminate the requirement of external power switch.
• Available in 64 pin LQFP package chips or probed for dies COB module

APPLICATION BLOCK DIAGRAM 3
2.0 Application Block Diagram
The AU9462 is a single chip that integrates USB keyboard, ACPI and multimedia control
functionalities. The multimedia function keys are designed to support a full range of hotkeys
such as CD/DVD, Play/Pause, Stop, Eject, Mute and general purpose shortcut keys for one
key Internet, E-mail, Help and etc.
PC with USB Host Controller
USB Mouse
USB Scanner
USB Keyboard Hub
Rotary encoder,
volume control
USB
Downstream
Port
USB
Downstream
Port
USB
Upstream
Port

APPLICATION BLOCK DIAGRAM 4

PIN ASSIGNMENT 5
3.0 PinAssignment
SCAN_R3
NC
USB2_DP USB2_DM NC
SCAN_R2
SCAN_R4 SCAN_R5 SCAN_R6 SCAN_R7 SCAN_R8 SCAN_R9
SCAN_R10 NC GNDIO SCAN_R1
CAPS_LOCK
SCROLL_LOCK
ROMSEL3
E2P_DATA
E2P_CLK
FNKEYN
ACPIKEYN
AIN
EEPENABLE
BIN
NUM_LOCK
LED1
VCCK
SCAN_C8
GNDK
LED2
16
14
15
10
11
12
7
8
9
5
6
2
3
4
1
13
61 60 59 58 57 56 55 54 53 52 51 50 49
6264 63
SCAN_C7
SCAN_C5
SCAN_C4
SCAN_C3
SCAN_C2
SCAN_C1
SCAN_R19
SCAN_R18
SCAN_R17
SCAN_R16
SCAN_R15
SCAN_R14
SCAN_R13
SCAN_C6
SCAN_R12
SCAN_R11
33
35
34
39
38
37
42
41
40
44
43
47
46
45
48
36
20 21 22 23 24 25 26 27 28 29 30 31 32
19
17 18
XTAL_2
GNDA
VCCA
NC
DP2_PWROUT
NC
DP1_PWROUT
NC
VCC5V
NC
VCC3V
USB_DM
USB_DP
XTAL_1
USB1_DP
USB1_DM

PIN ASSIGNMENT 6
Table 3-1. Pin Description
Pin Pin Name IO Type Description
1 XTAL_1 Input 12MHz Crystal input
2 XTAL_2 Output 12MHz Crystal output
3 GNDA Ground
4 VCCA Power Analog power
5 NC
6 DP2_PWROUT Power Port 2 power supply and over-current detection.
7 NC
8 DP1_PWROUT Power Port 1 power supply and over-current detection.
9 NC
10 VCC5V Power 5v power supply
11 NC
12 VCC3V Power 3v power supply
13 USB_DM Input/ Output USB upstream D-
14 USB_DP Input/ Output USB upstream D+
15 USB1_DP Input/ Output USB downstream Port1 D+
16 USB1_DM Input/ Output USB downstream port1 D-
17 NC
18 GNDIO GROUND
19 SCAN_R1 Input/ Output, Pull down Row Scan line
20 NC
21 USB2_DP Input/ Output USB downstream Port2 D+
22 USB2_DM Input/ Output USB downstream Port2 D-
23 NC
24 SCAN_R2 Input/ Output, Pull down Row Scan line
25 SCAN_R3 Input/ Output, Pull down Row Scan line
26 SCAN_R4 Input/ Output, Pull down Row Scan line
27 SCAN_R5 Input/ Output, Pull down Row Scan line
28 SCAN_R6 Input/ Output, Pull down Row Scan line
29 SCAN_R7 Input/ Output, Pull down Row Scan line
30 SCAN_R8 Input/ Output, Pull down Row Scan line
31 SCAN_R9 Input/ Output, Pull down Row Scan line
32 SCAN_R10 Input/ Output, Pull down Row Scan line
33 SCAN_R11 Input/ Output, Pull down Row Scan line