AUTHENTEC EntrePad AES2501A User manual

2317Rev 1.1 (17NOV04)
EntréPad AES2501A FINGERPRINT SENSOR
Product Specification
For Universal Serial Bus Applications
Hardware Reference
2317 Rev 1.1
November 17, 2004
AuthenTec Confidential Information
AuthenTec, Inc.
Post Office Box 2719
Melbourne, Florida 32902-2719
321-308-1300
www.authentec.com

2317 Rev 1.1 (17NOV04) AuthenTec Confidential Information 2
AuthenTec welcomes your suggestions. We try to make our publications useful, interesting, and informative, and
we hope you will take the time to help us improve them. Please send any comments or suggestions by mail or e-
mail.
Disclaimer of Warranty
AUTHENTEC SOFTWARE,INCLUDING INSTRUCTIONS FOR ITS USE,IS PROVIDED “AS IS”WITHOUT WARRANTY OF ANY KIND.AUTHENTEC FURTHER
DISCLAIMS ALL IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR OF FITNESS FOR A
PARTICULAR PURPOSE.THE ENTIRE RISK ARISING OUT OF THE USE OR PERFORMANCE OF THE SOFTWARE AND DOCUMENTATION REMAINS WITH
YOU.
IN NO EVENT SHALL AUTHENTEC,ITS AUTHORS,OR ANYONE ELSE INVOLVED IN THE CREATION, PRODUCTION,OR DELIVERY OF THE SOFTWARE
BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,WITHOUT LIMITATION,DAMAGE FOR LOSS OF BUSINESS PROFITS,
BUSINESSINTERRUPTION,LOSS OF BUSINESS INFORMATION,OR OTHER PECUNIARY LOSS)ARISING OUT OF THE USE OF OR INABILITY TO USE THE
SOFTWARE OR DOCUMENTATION,EVEN IF AUTHENTEC HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.BECAUSE SOME STATES OR
COUNTRIES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES,THE ABOVE LIMITATION
MAY NOT APPLY TO YOU.
U.S. Government Restricted Rights
AuthenTec software and documentation are provided with RESTRICTED RIGHTS. Use, duplication, or disclosure by the government is
subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS
252.227-7013 or subparagraph (c)(1) and (2) of the Commercial Computer Software – Restricted Rights 48 CFR 52.227-19, as
applicable. Manufacturer is AuthenTec, Inc.; Melbourne, Florida 32901-2719.This Agreement is governed by the laws of the State of
Florida.
AuthenTec, Inc.
Post Office Box 2719
Melbourne, Florida 32902-2719
321-308-1300
www.authentec.com
[email protected]
AuthenTec, FingerLoc, EntréPad, Aware, AES2501A, AES3550, AES4000, AF-S2, ISX, TruePrint, the AuthenTec
colophons and logotypes, and the phrase “Personal Security for the Real World” are trademarks of AuthenTec, Inc.
Microsoft and Windows 98 are registered trademarks of Microsoft Corp. Microwire™ is a trademark of National
Semiconductor Corp. SPI™is a registered trademark of Motorola. All other trademarks are the property of their
respective owners.
Product Specification for the AES2501A Fingerprint Sensor
Copyright ©2004 by AuthenTec, Inc. No part of this publication may be reproduced in any form or by any means without prior written
permission. Printed in the United States of America.

2317 Rev 1.1 (17NOV04) AuthenTec Confidential Information 3
Table of Contents
1. INTRODUCING THE ENTRÉPAD AES2501A SLIDE SENSOR…..........................................................6
1.1 TRUEPRINT TECHNOLOGY IS…..............................................................................................................6
1.2 FEATURE SUMMARY..............................................................................................................................6
1.3 CONVENTIONS ......................................................................................................................................7
1.4 OPERATIONAL DESCRIPTION..................................................................................................................7
1.5 NAVIGATION USING THE AES2501A......................................................................................................8
2. DC ELECTRICAL CHARACTERISTICS ..................................................................................................9
2.1 ABSOLUTE MAXIMUM RATINGS ..............................................................................................................9
2.2 RECOMMENDED OPERATING CONDITIONS ..............................................................................................9
2.3 DC CHARACTERISTICS @RECOMMENDED OPERATING CONDITIONS.....................................................10
3. SENSOR OPERATION ...........................................................................................................................11
3.1 OPERATION DESCRIPTION ...................................................................................................................11
3.2 INTERNAL CHIP BLOCK DIAGRAM .........................................................................................................12
4. PACKAGING & PIN DEFINITIONS ........................................................................................................13
4.1 PACKAGING INFORMATION...................................................................................................................13
4.2 PIN LIST .............................................................................................................................................15
4.2.1 Pin Type and Activity Definitions...............................................................................................16
4.3 PIN DESCRIPTIONS..............................................................................................................................17
4.4 CLOCK SELECT CONTROL ...................................................................................................................18
4.4.1 Clock Specification....................................................................................................................18
4.5 TIMING INFORMATION ..........................................................................................................................20
4.5.1 Image Scan Timing....................................................................................................................20
4.5.2 USB Interface............................................................................................................................20
4.5.3 Finger Detect Auto-calibration...................................................................................................20
5. SYSTEM INTERFACE DESCRIPTIONS ................................................................................................21
5.1 INTERFACE SELECT CONTROL .............................................................................................................21
5.2 USB INTERFACE .................................................................................................................................22
5.3 RESET................................................................................................................................................24
6. SOFTWARE INTERFACE DETAILS ......................................................................................................25
6.1 REGISTER MAP...................................................................................................................................25
6.1.1.1 Control Register 1 (CTRL1) (80h).....................................................................................................27
6.1.1.2 Control Register 2 (CTRL2) (81h).....................................................................................................28
6.1.1.3 Excitation Common Controls (EXCITCTRL) (82h)..............................................................................29
6.1.1.4 Detect Control (DETCTRL) (83h) ....................................................................................................30
6.1.1.5 Navigation Correlation Range (NAVCORRNGE) (84h) .......................................................................31
6.1.1.6 Navigation Finger Detect Threshold (NAVFDTHRSH) (85h)................................................................31
6.1.1.7 Navigation Control (NAVCTRL) (86h)...............................................................................................32
6.1.1.8 Detect Frequency (DETFREQ) (87h)................................................................................................33
6.1.1.9 Column Scan Rate (COLSCAN) (88h)..............................................................................................34
6.1.1.10 Measure Drive (VDCTRLMD) (89h)..................................................................................................35
6.1.1.11 Measure Frequency (MEASFREQ) (8Ah)......................................................................................36
6.1.1.12 Demod Phase 1(DEMODPHASE1) (8Ch) .....................................................................................37
6.1.1.13 Channel Gain (CHANGAIN) (8Eh)................................................................................................38
6.1.1.14 Channel Bias (CHANBIAS) (8Fh).................................................................................................39
6.1.1.15 Carrier Null (CARRNULL) (90h)...................................................................................................40
6.1.1.16 A/D Reference High (ADREFHI) (91h) .........................................................................................41
6.1.1.17 A/D Reference Low (ADREFLO) (92h).........................................................................................41
6.1.1.18 Start Column (STRTCOL) (95h) ..................................................................................................42
6.1.1.19 End Column(ENDCOL) (96h) ......................................................................................................42

2317 Rev 1.1 (17NOV04) AuthenTec Confidential Information 4
6.1.1.20 Data Format (DATFMT) (97h)......................................................................................................43
6.1.1.21 Image Data Control (IMAGCTRL) (98h) ........................................................................................44
6.1.1.22 GPIO Data (GPIODATA) (99h)....................................................................................................45
6.1.1.23 Sensor Status (STAT) (9Ah)........................................................................................................46
6.1.1.24 Challenge Word 1 (CHWORD1) (9Bh) .........................................................................................47
6.1.1.25 Challenge Word 2 (CHWORD2) (9Ch).........................................................................................47
6.1.1.26 Challenge Word 3 (CHWORD3) (9Dh).........................................................................................48
6.1.1.27 Challenge Word 4 (CHWORD4) (9Eh) .........................................................................................48
6.1.1.28 Challenge Word 5 (CHWORD5) (9Fh)...........................................................................................48
6.1.1.29 Test Register 1 (TREG1) (A1h) ...................................................................................................49
6.1.1.30 FD Threshold (FDTHRESHOLD) (A8h)........................................................................................50
6.1.1.31 Miscellaneous Control (MISCCTRL) (ACh) ...................................................................................51
6.1.1.32 Single Reg. Address (SREGADDR) (ADh)....................................................................................52
6.1.1.33 FDRV X HI (FDRVXHI) (AEh)......................................................................................................53
6.1.1.34 FDRV X LO (FDRVXLO) (AFh)....................................................................................................53
6.1.1.35 Watchdog Control (WDCtrl) (B0h) ................................................................................................54
6.1.1.36 Misc. Image Control/GPIO Disable(MISCICTRL) (B3h)...................................................................55
6.1.1.37 SOF Timestamp/FreeRun[13:7] (SOFTIMEHIGH) (BAh) ................................................................56
6.1.1.38 SOF Timestamp/FreeRun[6:0] (SOFTIMELOW) (BBh)...................................................................56
6.1.1.39 EOF Timestamp[13:7] (EOFTIMEHIGH) (BCh).............................................................................56
6.1.1.40 EOF Timestamp[6:0] (EOFTIMELOW) (BDh)................................................................................57
7. DATA FORMATS ....................................................................................................................................58
7.1 OVERVIEW..........................................................................................................................................58
7.1.1 Registers Message Format.......................................................................................................59
7.1.2 Image Data Format – Grey Scale 500 ppi.................................................................................59
7.1.3 Image Data Format – 250 ppi....................................................................................................60
7.1.4 Image Data Format – Monochrome ..........................................................................................61
7.1.5 Histogram Message Format......................................................................................................62
7.1.6 Authentication Word Message Format......................................................................................63
8. PART NUMBERING SCHEME................................................................................................................64
9. REVISION HISTORY...............................................................................................................................65

2317 Rev 1.1 (17NOV04) AuthenTec Confidential Information 5
LIST OF FIGURES
Figure 1-1 Row Numbering..............................................................................................................................7
Figure 2-1 Absolute Maximum Ratings............................................................................................................9
Figure 2-2 Recommended Operating Conditions ............................................................................................9
Figure 2-3 DC Characteristics........................................................................................................................10
Figure 3-1 AES2501A Functional Diagram.....................................................................................................11
Figure 3-2 Internal Chip Block Diagram.........................................................................................................12
Figure 4-1 Pin List by Interface......................................................................................................................16
Figure 4-2 AES2501A Active Pin Functional Description ..............................................................................17
Figure 4-3 External Clock Specifications.......................................................................................................19
Figure 5-2 SIO Pin Definitions for the USB Interface.....................................................................................21
LIST OF TABLES
Table 4-1 CLKSEL[2:0] Decode 18
Table 5-2 Device Descriptor 22
Table 5-3 Default Configuration Descriptor 23
Table 5-4 Default Interface 0, Alternate Setting 0 Descriptor 23
Table 5-5 Default Interface 0, Alternate Setting 0, Bulk Endpoint Descriptors 23
Table 5-6 String 0 Descriptor 24
Table 6-1 Registers Summary 26
Table 7-1 Command Byte Definition 58
Table 7-2 Gray Scale Message Format 59
Table 7-3 4 Bit 250 ppi Gray Scale Message Format 60
Table 7-4 Monochrome Packed Message Format 61
Table 7-5 Histogram Message Format 62
Table 7-6 Authentication Word Message Format 63