EM4055 [EMMICRO]
1KBIT Read/Write Contactless Identification Device with anticollision; 1K位，读/写非接触式识别装置与防冲突
| 型号： | EM4055 |
| 厂家： | 
EM MICROELECTRONIC - MARIN SA |
| 描述： | 1KBIT Read/Write Contactless Identification Device with anticollision |
| 文件： | 总1页 (文件大小：24K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
EM MICROELECTRONIC - MARIN SA
EM4055
1KBIT Read/Write Contactless Identification Device
with anticollision
Description
The EM4055 is a CMOS integrated circuit for passive
Features
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1k bit EEPROM (32 words of 32 bit each)
User defined Read memory area as default output
User defined Write protected words
User defined Read protected words
Power-check before EEPROM Write operation
32 bits WORM anticollision ID
32 bits WORM device identification
Fast Anticollision Protocol for a large number of
Transponders
read/write RF-transponders operating in the low frequency
range (125kHz typically). The chip contains 1kbit of
EEPROM which can be configured by the user allowing
write inhibited words, read protected words and read area
output continuously at power-on. The memory can be
secured by using the 32-bit password for all write and
read protected operations. The password can be updated
but never read. The fixed code anticollision ID and device
identification are programmed once, and then locked. The
chip can be configured to start at power on in QUIET
mode, or in Standard read mode. The EM4055 will
transmit data to the reader by modulating the amplitude of
the magnetic field, and receive data and commands by
100% modulation induced by the reader. Simple
commands allow writing to EEPROM, updating the pass-
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Detection of Tag entering the field
Data transmission performed by amplitude modulation
Reader to transponder : ASK 100%, Transponder to
Reader : ASK
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User selectable data-rate : RF/64 or RF/32
100kHz to 150kHz field frequency range
On-chip rectifier and voltage limitation
On-chip supply buffer capacitor
Power-on Reset
-40 to +85°C operating temperature range
word, read
a specific memory area, perform the
anticollision procedure, and reset the logic. The coil and
capacitor of the tuned LC circuit are the only external
components required.
Applications
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Ticketing
Hands free Access control
Inventory Control
Prepayment devices
Manufacturing automation with portable database
Industrial logistics
Typical Operating Configuration
C2
EM4055
L
C
C1
Typical configuration at 125 kHz uses a coil of 4.9 mH
and a 330 pF capacitor
Fig. 1
1
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Copyright Ó 2002, EM Microelectronic-Marin SA
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