Alcor AU9331 Product manual
AU9331
USB Secure Digital Card Reader
Technical Reference Manual
Revision 1.2
© 1997-2002 Alcor Micro Corp.
All Rights Reserved
Copyright Notice
Copyright 1997 - 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: 886-2-8751-1984
Fax: 886-2-2659-7723
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: (408) 845-9300 Phone: (909) 483-9900
Fax: (408) 845-9086 Fax: (909) 944-0464
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----------------------------------------- 7
4.1 AU9331 Block Diagram------------------------------------------------------------------ 7
4.2 Sample Schematics------------------------------------------------------------------------ 8
5.0 Electrical Characteristics------------------------------------------------------------------- 9
5.1 Recommended Operating Conditions------------------------------------------------- 9
5.2 General DC Characteristics ------------------------------------------------------------ 9
5.3 DC Electrical Characteristic for 3.3 volts operation ------------------------------- 9
5.4 Crystal Oscillator Circuit Setup for Characteristics ------------------------------ 10
5.5 ESD Test Results -------------------------------------------------------------------------- 11
5.6 Latch-Up Test Results ------------------------------------------------------------------- 12
6.0 Mechanical Information---------------------------------------------------------------------- 15
TABLE OF CONTENTS i
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INTRODUCTION 1
1.0 Introduction
1.1 Description
The AU9331 is an integrated USB Secure Digital (SD) card reader controller. It supports
Secure Digital (SD) and Multimedia Card (MMC) with automatic card type detection
capability. It can be used as a removable storage disk in enormous data exchange applications
between PC and PC or PC and various consumer electronic devices.
The AU9331 can read Secure Digital card’s contents created by handheld consumer electronic
devices such as digital camera, MP3 player, PDA and mobile phone.., etc. It provides a faster
and convenient way of data transfer scheme to meet the emerging need of a data exchange
center between PC and various consumer devices. With AU9331, users’ experience will be
further enhanced by the Plug-and-Play nature built into latest operation systems such as
Windows XP and MacOS X.
Because of the multiple sectors transfer up to 4G bytes and the single chip integration,
AU9331 is the most powerful and cost efficient SD reader controller solution in the market.
1.2 Features
Fully compliant with USB v1.1 specification and USB Device Class Definition for
Mass Storage, Bulk-Transport v1.0
Fully compliant with Secure Digital (SD) v1.0 Specification.
Work with default driver from Windows ME, Windows 2000, Windows XP, Mac
OS 9.1, Mac OS X; Linux, Windows 98 and WinCE 3.0 are supported by vendor
driver from Alcor.
Ping-pong FIFO implementation for concurrent bus operation to increase bandwidth
Support multiple sectors transfer up to 4G bytes to optimize performance
Support optional external EEPROM for USB VID, PID and string customization
LED for bus activity monitoring
Runs at 12MHz
Built-in 3.3V regulator
28-pin SSOP package
INTRODUCTION 2
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APPLICATION BLOCK DIAGRAM 3
2.0 Application Block Diagram
Following is the application diagram of a typical flash memory card reader using AU9330. By
connecting the reader to a PC through USB port, the AU9331 is acting as a bridge between
the flash memory card from digital camera, MP3 player, PDA or mobile phone and PC.
PC with USB Host Controller
USB Flash
Card Reader
Moble Phones
PDA
MP3 Player
Digital Camera
SD/MMC
Card
PC
APPLICATION BLOCK DIAGRAM 4
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PIN ASSIGNMENT 5
3.0 Pin Assignment
The AU9331 is packed in 28-SSOP form factor. The following figure shows signal name for
each pin and the table in the following page describes each pin in detail.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
AU9331
28-pin
SSOP
NC
XTAL1
XTAL2
VSSA
VCCA
VCC5V
VCCIO
USB_DM
USB_DP
SDA
SCK
VSSIO
TEST
NC NC
PWD
SDWP
SDCD
SDDATA
SDCLK
SDCMD
VSSK
VCCK
GPI2
GPI1
GPI0
GPO7
NC
PIN ASSIGNMENT 6
Table 3-1. Pin Descriptions
pin Name IO Type Description
1 NC
2 XTAL1 I Crystal Oscillator Input (12MHz)
3 XTAL2 O Crystal Oscillator Output (12MHz)
4 VSSA Ground Analog Ground
5 VCCA PWR Analog power supply
6 VCC5V PWR 5V power supply
7 VCCIO PWR Regular 3.3V output/ IO 3.3V input
8 USB_DM I/O USB D-
9 USB_DP I/O USB D+
10 SDA I/O EEPROM data inout
11 SCK O EEPROM clcok
12 VSSIO PWR Ground
13 Test I Should connect to Vss
14 NC
15 NC
16 PWD O 0 Power on; 1 Power down
17 SDWP I SD Write Protect
18 SDCD I SD Card Detect
19 SDDATA I/O SD Card Data
20 SDCLK O SD Card Clock
21 SDCMD I/O SD Card Command
22 VSSK PWR Ground
23 VCCK PWR Core 3.3V Input
24 GPI2 I Should connect to Vss
25 GPI1 I Should connect to Vss
26 GPI0 I Should connect to Vss
27 GPO7 O General Purpose Output pin, used as activity LED
28 NC
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