EM MICROELECTRONIC
- MARIN SA
EM4022
Multi Frequency Contactless Identification Device
Anti-Collision compatible with BTG's Supertag Category Protocols
Description
The EM4022 (previously named P4022) chip implements
patented anti-collision protocols for both
high
frequency
and
low
frequency applications. It is even possible to
identify transponders with identical codes, thereby
making it possible to count identical items. The chip is
typically used in “passive” transponder applications, i.e. it
does not require a battery power source. Instead, it is
powered up by an electromagnetic energy field or beam
transmitted by the reader, which is received and rectified
to generate a supply voltage for the chip. A pre-
programmed code is transmitted to the reader by varying
the amount of energy that is reflected back to the reader.
This is done by modulating an antenna or coil, thereby
effectively varying the load seen by the reader.
Typical Applications
Access control
Animal tagging
Asset control
Sports event timing
Licensing
Electronic keys
Auto-tolling
Features
Implements all BTG anti-collision protocols:
Fast SWITCH-OFF, SLOW-DOWN, and
FREE-RUNNING
Can be used to implement low frequency
inductive coupled transponders, high frequency
RF coupled transponders or bi-frequency
transponders
Reading 500 transponders in less than one
second for high frequency applications
Factory programmed 64 bit ID number
Data rate options form 4 kbit/s to 64 kbit/s
Manchester data encoding
Any field frequency: Typically 125 kHz, 13.56
MHz inductive and 100 MHz to 2.54 GHz RF
Data transmission done by amplitude
modulation
Trimmed 110 pF ± 3% on-chip resonant
capacitor
On-chip oscillator, rectifier and voltage limiter
Low power consumption
Low voltage operation : down to 1.5 V at
ambient temperature
°
-40 to +85 C operating temperature range
Pin Assignment
Pad N°
1
2
3
4
5
6
7
8
9
10
11
Fig. 1
EM 4 0 2 2
1
2
3
4
5
6
7
11
10
9
8
Name
XCLK
V
DD
M
M
TST
COIL1
COIL2
V
SSTST
V
SS
GAP
SI
TMC
Function
external test clock input
positive supply
connection to antenna
test output
Coil terminal 1
Coil terminal 2
negative test supply output
negative supply
GAP input
Serial test data input (pull down)
Test mode control (pull down)
Copyright
2002, EM Microelectronic-Marin SA
1
www.emmicroelectronic.com
EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
