Alcor AU9440 Product manual

AU9440
USB Keyboard Controller
Technical Reference Manual
Revision 1.1
2002 Alcor Micro Corp.
All Rights Reserved

Copyright Notice
Copyright 1996 - 2002
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 OF 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 Assignment------------------------------------------------------------------------------- 5
4.0 System Architecture and Reference Design---------------------------------------- 9
4.1 AU9440 Block Diagram----------------------------------------------------------------- 9
4.2 Sample Schematics----------------------------------------------------------------------- 10
4.3 AU9440 Keyboard EEPOM Sample Value----------------------------------------- 11
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

TABLE OF CONTENTS i
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INTRODUCTION 1
1.0 Introduction
1.1 Description
The AU9440 is a single chip integrated USB keyboard, ACPI and multimedia function
controller chip. It supports the 18 x 8 keyboard matrix. Each key can be individually
programmed for any USB usage page and usage code, including standard key code, ACPI and
multimedia usage…etc.
Separated ACPI key is another special feature offered by AU9440. There is one pin dedicated
for all-in-one ACPI function, and one additional scan line to support 8 “Desktop” page keys.
Fn key function is designed to enable selection of alternative 14 x 8 matrix for small size
keyboard.
The USB descriptors and keyboard matrix can be customized via an optional external 24C08
EEPROM, or directly select the internal 4 different models from internal ROM. This feature
makes customization of new projects cost-effective and efficient by only adding an external
EEPROM while still using the same mass production chip.
This single chip integration makes the AU9440 the most cost effective USB keyboard
solution available in the market.
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
• Single USB transceiver to drive upstream port
• Support for 18 x 8 standard key matrix. An Fn pin to selection of alternative matrix.
• Support separate ACPI keys . One pin dedicated for all-in-one ACPI function and also
editable in the 18x8 key matrix
• 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 (vendor defined)

INTRODUCTION 2
• An additional LED2 for suspend special usage which will be turned on in suspend or can
be defined by vendors
• Support ACPI compliant suspend/shutdown key
• Fn key toggles or selectable based on a configuration bit
• USB vendor ID, product ID, and keyboard scan code table can be customized via
optional external EEPROM.
• Runs at 6 Mhz frequency
• Contains 4K byte ROM to support 4 different keyboard models
• Available in 48 DIP, 48 SSOP and bare die. COB module solution is also available

APPLICATION BLOCK DIAGRAM 3
2.0 Application Block Diagram
The AU9440 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 Keyboard
USB Mouse

APPLICATION BLOCK DIAGRAM 4
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PIN ASSIGNMENT 5
3.0 Pin and Pad Assignment
3.1 Pin Assignment
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
2
1
24
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
47
48
25
VCC5V
XTAL_1
SCANR_1
SCAN_R2
SCANR_3
SCANR_4
SCANR_5
SCANR_6
SCANR_7
SCANR_8
SCANR_9
SCANR_10
SCANR_11
SCANR_12
SCANR_13
SCANR_14
SCANR_15
SCANR_16
SCANR_17
SCANR_18
NC
VCC_3V
EEP_ENABLE
GND
USB_DM
CAP_LOCK
NUM_LOCK
LED1
E2PDATA/ROM_SEL1
SCANC_5
SCANC_4
SCANC_3
SCANC_2
SCANC_1
SCANC_6
SCANC_7
SCANC_8
ACPI_KEY
E2PCLK/ROM_SEL2
XTAL_2
NC
NC NC
NC
Fn_KEY
SCROLL_LOCK
LED2
USB_DP

PIN ASSIGNMENT 6
Table 3-1. Pin Description
Pin No. Pin Name IO Type Description
1 VCC5V Power Supply 5v power supply
2 XTAL_1 INPUT 6MHz crystal, input
3 XTAL_2 OUTPUT 6MHz crystal, output
4 SCANR_1 INPUT/OUTPUT, PULL DOWN Row/Scan line
5 SCANR_2 INPUT/OUTPUT, PULL DOWN Row/Scan line
6 SCANR_3 INPUT/OUTPUT, PULL DOWN Row/Scan line
7 SCANR_4 INPUT,PULL UP, PULL DOWN Row/Scan line
8 SCANR_5 INPUT,PULL UP, PULL DOWN Row/Scan line
9 SCANR_6 INPUT,PULL UP, PULL DOWN Row/Scan line
10 SCANR_7 INPUT,PULL UP, PULL DOWN Row/Scan line
11 SCANR_8 INPUT,PULL UP, PULL DOWN Row/Scan line
12 SCANR_9 INPUT,PULL UP, PULL DOWN Row/Scan line
13 SCANR_10 INPUT,PULL UP, PULL DOWN Row/Scan line
14 SCANR_11 INPUT,PULL UP, PULL DOWN Row/Scan line
15 SCANR_12 INPUT,PULL UP, PULL DOWN Row/Scan line
16 SCANR_13 INPUT,PULL UP, PULL DOWN Row/Scan line
17 SCANR_14 INPUT,PULL UP, PULL DOWN Row/Scan line
18 SCANR_15 INPUT,PULL UP, PULL DOWN Row/Scan line
19 SCANR_16 INPUT,PULL UP, PULL DOWN Row/Scan line
20 SCANR_17 INPUT,PULL UP, PULL DOWN Row/Scan line
21 SCANR_18 INPUT,PULL UP, PULL DOWN Row/Scan line
22 NC
23 NC
24 NC
25 NC
26 NC
27 SCANC_1 INPUT,PULL UP Column line
28 SCANC_2 INPUT,PULL UP Column line
29 SCANC_3 INPUT,PULL UP Column line
30 SCANC_4 INPUT/OUTPUT Column line
31 SCANC_5 INPUT/OUTPUT Column line
32 SCANC_6 INPUT/PULL UP Column line
33 SCANC_7 INPUT/PULL UP Column line
34 SCANC_8 INPUT/PULL UP Column line
35 ACPI_KEY INPUT/PULL UP Sleep, Shutdown, Wakeup
36 Fn_KEY INPUT/PULL UP Select alternative keyboard
37 E2PCLK/ROM_SEL2 INPUT/OUTPUT PULL UP EEPROM clock / Or select 2
for internal mask ROM
38 E2PDATA/ROM_SEL1 INPUT/OUTPUT PULL UP EEPROM data / Or
select 1 for internal mask ROM
39 SCROLL_LOCK OUTPUT Scroll_lock LED output-low
active-open drain
40 CAP_LOCK OUTPUT Cap lock LED – low active –
open drain
41 NUM_LOCK OUTPUT Num lock LED – low active –
open drain
42 LED1 OUTPUT Additional LED 1 – low
active –open drain