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EM4350A6WT11 参数 Datasheet PDF下载

EM4350A6WT11图片预览
型号: EM4350A6WT11
PDF下载: 下载PDF文件 查看货源
内容描述: 1千位读/写非接触式识别装置 [1 KBit READ / WRITE CONTACTLESS IDENTIFICATION DEVICE]
分类和应用: 装置
文件页数/大小: 14 页 / 551 K
品牌: EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
 浏览型号EM4350A6WT11的Datasheet PDF文件第2页浏览型号EM4350A6WT11的Datasheet PDF文件第3页浏览型号EM4350A6WT11的Datasheet PDF文件第4页浏览型号EM4350A6WT11的Datasheet PDF文件第5页浏览型号EM4350A6WT11的Datasheet PDF文件第7页浏览型号EM4350A6WT11的Datasheet PDF文件第8页浏览型号EM4350A6WT11的Datasheet PDF文件第9页浏览型号EM4350A6WT11的Datasheet PDF文件第10页  
R
EM4150  
EM4350  
Selective Read Mode cont.  
The Selective Read mode command is followed by a single 32-bit word containing the new first and last addresses. Bits 0  
to 7 correspond to the First Word Read and bits 8 to 15 correspond to the Last Word Read. Bits 16 to 31 have to be sent  
but are not used in the chip. The parities must be sent according to the word organisation as described in fig.7. Note that  
bit 31 is transmitted first.  
To read the device Identification or the Serial Number, the Selective Read Command allows direct access to the Laser  
programmed words. These words can also be addressed in the standard read mode by selecting the addresses  
accordingly.  
OUTPUT  
INPUT  
WORD n  
LIW  
ACK/NAK LIW  
LIW  
FWR  
LIW  
RM Selective RD ADDRESSES  
tpp  
Fig. 11  
First bit received  
Addresses Bit Stream Format  
XX  
XX  
XX  
XX  
XX  
XX  
XX  
XX  
P3 XX XX XX XX XX XX XX XX P2  
LW7 LW6 LW5 LW4 LW3 LW2 LW1 LW0 P1 FW7 FW6 FW5 FW4 FW3 FW2 FW1 FW0 P0 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 "0"  
Fig. 12  
Reset Command  
The Reset Command will return from any mode to the Standard Read Mode. The next word out is the FWR.  
OUTPUT  
INPUT  
WORD n  
LIW  
LIW  
FWR  
LIW  
ACK/NAK  
LIW  
RM  
RESET  
t
pp  
t
init  
Fig. 13  
Login  
The Login command is used to access protected memory areas. This command has to be used only once to perform  
several password protected commands. The Power-On sequence and the Reset command will reset the password entry,  
and a new Login command has to be received to perform further password protected operations.  
Upon reception of a correct password, the EM4150 will respond with an acknowledge pattern (ACK) and then continue in  
Standard Read Mode. If the Login is correct then password protected operations are allowed. If the password is incorrect, a  
NAK pattern is issued and password protected operations will not be possible (refer to Write Word for password data  
structure).  
OUTPUT  
INPUT  
LIW  
WORD n  
LIW  
ACK/NAK  
LIW  
FWR  
LIW  
RM  
LOGIN  
PASSWORD  
tpp  
Fig. 14  
If bit 16 of the control word is disabled (Password Check ON/OFF), the Login is still mandatory to modify the Protection  
Word, the Control Word, and the Password, but not to write in the EEPROM which is not write inhibited. In order to modify a  
write inhibited word, the Protection word has to be modified first. The Read protected area always requires the Login to be  
read. If the Write Protection Word is write protected, the write protection configuration is locked.  
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Copyright © 2004, EM Microelectronic-Marin SA