Storage capacity, Biometric performances, Software – Rainbow Electronics AT77SM0101BCB02VKE User Manual
Page 7: Operating system driver modules

7
AT77SM0101BCB02VKE
5391A–BIOM–09/04
Storage Capacity
Figure 5. RAM Memory Mapping
Figure 6. DataFlash Memory Mapping
Biometric Performances
The device’s biometric performances are characterized by the following:
•
An image size of 500 × 400
•
256 levels of grey
•
A finger swiping speed from 2 to 15 cm/s
•
An FRR under 3% at an FAR 10
-4
rate using an IKENDI
®
algorithm
•
An authentication time of under 10 ms
•
A biometric template size of 384 bytes
•
An authentication algorithm size of 420 kbytes
•
An identification time of under 1 second for 50 templates
Software
Operating System
Driver Modules
The biometric module comes preloaded with the Linux operating system (kernel 2.4.19
rmk 7). The kernel includes:
•
Ramdisk support
•
A serial port driver supporting DBGU and up to four UARTs
•
An SPI driver
•
Ethernet layers 10/100 Mbits (compatible with MII protocol)
•
Watchdog support
Further information can be retrieved at http://www.arm.linux.org.uk.
Used by Ramdisk
Kernel
Code
Used by Kernel
Free
6 MB
1.5 MB
4 MB
4.5 MB
16 MB RAM
Compressed
Kernel
Compressed Ramdisk
AT77SM0101BCB02VKE Compressed Ramdisk < 2 MB
700 kB
3 MB
300 kB
4 MB DataFlash
16 kB
Templates
Database
Storage