Rainbow Electronics AT77SM0101BCB02VKE - Manual (Page 2)

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AT77SM0101BCB02VKE
5391A–BIOM–09/04
Functional
Description
The AT77SM0101BCB02VKE is a biometric sub-system based on Atmel’s FingerChip
fingerprint sensor. It comprises a fingerprint sensor connected to a board that embeds
processing capabilities through an ARM9-based AT91RM9200 microprocessor, and
memory to store the software and fingerprint templates.
The biometric module must be connected to a motherboard for power supplies and
interface connections. Connection to the motherboard is achieved through two standard
connectors located on the sides of the module board.
The module is loaded with a Linux operating system, an Atmel driver for the FingerChip
sensor, and by default, authentication software (biometric library) for extraction of finger-
print characteristics and comparison with enrolled templates (also called bio-engine).
The standalone module can perform the following:
• Enrollment: an operation where the end-user scans his fingerprint by sweeping it
across the FingerChip sensor, providing a fingerprint signature reference (template)
• Authentication: accurate matching of the newly acquired fingerprint against the
template stored in the board’s memory during the enrollment procedure, used to
validate user authentication
• Identification: matching of the fingerprint image against the correct template within a
database of previously acquired templates
These three functions can then be used in any application requiring authentication to
grant rights to a user, or to change criteria of the user’s profile. Examples of typical
applications might include physical access control or time and attendance monitoring.
The AT77SM0101BCB02VEK Evaluation Kit provides all the tools necessary for easy
development of a customized application using the biometric module APIs.
The AT77SM0101BCB02VKE biometric module lets you add convenient and secured
user authentication to your products in a surprisingly reduced development time.
Figure 2. AT77SM0101BCB02VKE Block Diagram
Motherboard
Connectors
AT91RM9200
SDRAM
16 MB
Flash
4 MB
AT77C101B-CB02V
Control
8 Bits
Linear
Regulator
GPIOS Interfaces
3.3V
3.3V 1.8V
32-bit
Data Bus SPI