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參數(shù)資料
| 型號： | EM4150A6WT27E |
| 廠商： | EM Microelectronic |
| 英文描述： | 1 KBit READ / WRITE CONTACTLESS IDENTIFICATION DEVICE |
| 中文描述： | 1千位讀/寫非接觸式識別裝置 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 386K |
| 代理商： | EM4150A6WT27E |
R
EM4150
EM4350
Block Diagram
Copyright
2004, EM Microelectronic-Marin SA
Control
Logic
Modulator
Encoder
Power
Control
Clock
Extractor
Sequencer
Data
Extractor
Command
Decoder
EEPROM
ROM
+V
GND
Coil 2
Coil 1
Serial Data
Reset
Write Enable
C
s
C
r
AC/DC
converte
r
Voltage
Regulation
VDD
Fig. 4
Functional Description
General
The EM4150 is supplied by means of an electromagnetic
field induced on the attached coil. The AC voltage is
rectified in order to provide a DC internal supply voltage.
When the DC voltage crosses the Power-On level, the
chip enters the Standard Read Mode and sends data
continuously. The data to be sent in this mode is user
defined by storing the first and last addresses to be
output. When the last address is sent, the chip will
continue with the first address until the transceiver sends
a request. In the read mode, a Listen Window (LIW) is
generated before each word. During this time, the
EM4150 will turn to the Receive Mode (RM) if it receives
a valid RM pattern. The chip then expects a valid
command.
Mode of Operation
Standard
Read Mode
Send word
Power-On
Write Word
Write Password
Selective Read
Login
Yes
No
Receive
Mode
request
Reset
Get Command
Execute Command
Init
Fig. 5
Memory Organisation
The 1024 bit EEPROM is organised in 32 words of 32
bits. The first three words are assigned to the Password,
the Protection word, and the Control word. In order to
write one of these three words, it is necessary to send
the valid password. At fabrication, the EM4150 comes
with all bits of the password programmed to a logic "0".
The Password cannot be read out. The memory contains
two extra words of Laser ROM. These words are laser
programmed during fabrication for every chip, are unique
and cannot be altered.
Memory Map
Bit 0
PASSWORD
PROTECTION WORD
CONTROL WORD
2
Protection Word
0 - 7
8 - 15
16 - 23
24 - 31
Password
Write Only - NO Read Access
Device Identification Word &
Serial Number Word
Laser Programmed - Read Only
First Word Read Protected
Last Word Read Protected
First Word Write Inhibited
Last Word Write Inhibited
Control Word
0 - 7
8 - 15
16
17
18 - 31
First Word Read
Last Word Read
Password Check On/Off
Read After Write On/Off
User available
On means bit set to logic '1'
Off means bit set to logic '0'
Bit 31
EE
EE
EE
EE
928 Bits of USER
EEPROM
DEVICE SERIAL NUMBER
DEVICE IDENTIFICATION
Word 0
1
31
32
33
Laser
Laser
Fig. 6
4
www.emmicroelectronic.com
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