EM MICROELECTRONIC - MARIN SA
EM4022
Multi Frequency Contactless Identification Device
Anti-Collision compatible with BTG's Supertag Category Protocols
Description
Features
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.
ꢀ
ꢀ
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
ꢀ
ꢀ
Typical Applications
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Access control
Animal tagging
Asset control
Sports event timing
Licensing
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
Electronic keys
Auto-tolling
ꢀ
-40 to +85 °C operating temperature range
Pin Assignment
Pad N°
Name
XCLK
VDD
Function
1
2
external test clock input
positive supply
3
M
connection to antenna
test output
4
MTST
COIL1
COIL2
VSSTST
VSS
11
10
9
5
Coil terminal 1
EM4022
6
Coil terminal 2
1
2
3
7
negative test supply output
negative supply
8
9
GAP
SI
GAP input
10
11
Serial test data input (pull down)
Test mode control (pull down)
4
5
6
7
8
TMC
Fig. 1
1
www.emmicroelectronic.com
Copyright 2002, EM Microelectronic-Marin SA