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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 ]
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R
EM4150  
EM4350  
Write Word (cont.)  
After reception of the command, the address, and the data, the EM4150 will check the parity, the write protection status, the  
Login status, and also if the available power from the RF field is sufficient. If all the conditions are satisfied, an acknowledge  
pattern (ACK) will be issued afterward and the EEPROM writing process will start. At the end of programming, the chip will  
send an Acknowledge pattern (ACK). If at least one of the checks fails, the chip will issue a no acknowledge pattern (NAK)  
instead of ACK and return to the Standard Read Mode. The Transceiver will keep the RF field permanently "ON" during the  
whole writing process time.  
The Read After Write function (bit 17 of Control word) controls the mode of operation following a write operation. When  
"ON" the latest written word will be read out and output next to the ACK pattern and two Listen Windows (LIW-LIW) even if  
the word is read protected. When "OFF", the ACK is followed immediately by a LIW-LIW and FWR. The last written word is  
not output.  
If a request from the transceiver to return in receive mode (RM) is generated during the LIW, another word can be written in.  
Otherwise, the EM4150 will return in the Standard Read Mode.  
twa  
twee  
Write 1 word  
OUTPUT  
INPUT  
WORD n  
LIW  
ACK  
ACK  
LIW  
LIW  
FWR  
RM WRITE WORD ADDRESS  
DATA  
DATA  
DATA  
TRANSCEIVER RF FIELD "ON"  
twa  
twee  
Write several words  
OUTPUT  
WORD n  
LIW  
LIW  
ACK  
ACK  
INPUT  
RM WRITE WORD ADDRESS  
RM WRITE WORD ADDRESS DATA  
TRANSCEIVER RF FIELD "ON"  
twa  
twee  
Note: The Last Written is outpout  
even if Read Protected.  
Read After Write function  
OUTPUT  
INPUT  
WORD n  
LIW  
ACK  
ACK LIW LIW Last Written LIW  
LIW  
FWR  
RM WRITE WORD ADDRESS  
TRANSCEIVER RF FIELD "ON"  
twa  
OUTPUT  
INPUT  
WORD n  
LIW  
NAK  
LIW  
LIW  
FWR  
RM WRITE WORD ADDRESS  
DATA  
TRANSCEIVER RF FIELD "ON"  
Fig. 17  
8
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