3. Tag: The tag is compliant with the ISO/IEC 15693 standard. With a user
memory of 2k bits, organized in 64 blocks. The specifications of tag are:
Supported Standard ISO 15693-2,-3
Recommended Operating frequency 13.56 MHz
Factory programmed Read Only Number (UID) 64 bits
Memory (user programmable) 2k bits organized in 64 x 32-bit blocks
Data retention time (at +55°C) > 10 years
Operating temperature -25°C to +70°C
The application of RFID was, reads the UID of tag and identifies it.
2-3-2 Keypad
The keypad has 9 number keys and an enter key, it was connected with
PS/2 on SBC. The purpose of keypad is providing a password input interface
for user. The numeric key of PC keyboard was used for simulating a keypad
user interface in this thesis. The appearance was shown as following:
Figure 11. The Appearance of Keypad
2-3-3 USB Camera and Flash Disk
The USB flash disk was media storage, such as MP3 music, digital
photos, and it is also used for some applications in storage.
The USB camera used the M318B USB camera which was a YUV
camera. In the software chapter, it would be explained how to make it work.
24
