EVB90129 Datasheet, PDF (7/13 Pages) Melexis Microelectronic Systems – Asset management and monitoring (security and integrity)

EVB90129
MLX90129 Evaluation Board
3.3 RFID antenna
The EVB antenna has been designed to work with a 13.56MHz electromagnetic field. The antenna can be
directly connected to the MLX90129 through pins COIL1 and COIL2. The Shortcut R1 and R2 allows for
disconnecting the antenna and R3 and C1 footprint (components not mounted) could be used to match
MLX90129 with another antenna. The following schematic and drawing show the antenna connection and the
antenna shape:
TP1
COIL1
R2
R3
1K
COIL2
C1 ^0R
47p
R1
0R
TP2
Rectangular PCBantenna: 2820 x2020 Mils
wire=30 Mils / space=15 Mils / threetunrs
L = 1.838 uH
/!\ R3 and C1 are
not mounted
30 mil
76 mm
120 mil
304 mm
For information: 1 mil = 2.54E-3 cm
15 mil
38 mm
Bottom view
3.4 Register Configuration
There are a lot of possible configurations for enabling communication features. For example SPI or RFID
access can be disabled and EEPROM area or register file access can be restricted. The following
configuration puts the MLX90129 in a security free mode. The device is fully accessible by RFID and SPI.
More information is available in the MLX90129 datasheet.
Content
EEPROM security
Device security
# Hexa 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
04 AAA8 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0
05 3FF0 0 0 1 1 1 1 1 1 1 1 1 1 0 0 0 0
390129012901
Rev 003
Page 7 of 13
Evaluation Board
June-2010