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EM4223V2WS11 参数 Datasheet PDF下载

EM4223V2WS11图片预览
型号: EM4223V2WS11
PDF下载: 下载PDF文件 查看货源
内容描述: 只读超高频射频识别设备 [Read-only UHF Radio Frequency Identification Device]
分类和应用: 射频
文件页数/大小: 29 页 / 426 K
品牌: EMMICRO [ EM MICROELECTRONIC - MARIN SA ]
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R
EM4223  
NEXT_SLOT  
Acknowledges the successful reception of a  
Transponder transmission by the Reader when  
Acknowledges the successful reception of a  
Transponder transmission by the Reader  
valid ie. when received by a Transponder which when valid ie. when received by a  
has just transmitted, and when the command is  
received in the timing window and when the  
Transponder which has just transmitted, and  
when the command is received in the timing  
Signature matches, causing the Transponder to window and when the Signature matches,  
move from the ROUND_ACTIVE to the QUIET  
states.  
causing the Transponder to move from the  
ROUND_ACTIVE to the QUIET states.  
Causes a Transponder in the  
ROUND_STANDBY state to move into the  
ROUND_ACTIVE state.  
Causes a Transponder in the  
ROUND_STANDBY state to move into the  
ROUND_ACTIVE state.  
Causes the Transponder Current Slot Counter  
to increment by one.  
Causes the Transponder to automatically start  
a new Round by resetting its Current Slot  
Counter and randomly selecting a new Reply  
Slot when the Current Slot Counter has  
reached the Round Size Value.  
CLOSE_SLOT  
Causes a Transponder in the  
ROUND_STANDBY state to move into the  
ROUND_ACTIVE state.  
Causes a Transponder in the  
ROUND_STANDBY state to move into the  
ROUND_ACTIVE state.  
Causes the Transponder slot counter to  
increment by one.  
Causes the Transponder to automatically start  
a new Round by resetting its Current Slot  
Counter and randomly selecting a new Reply  
Slot when the Current Slot Counter has  
reached the Round Size Value.  
STANDBY_ROUND  
Causes the Transponder to move to the  
ROUND_STANDBY state, in which the  
Transponder does not transmit its identity or  
data.  
Causes the Transponder to move to the  
ROUND_STANDBY state, in which the  
Transponder does not transmit its identity or  
data. While in the ROUND_STANDBY state,  
the random number generator for slot number  
choosing is running so that transponder slots  
are not synchronized and thus have maximum  
spread and randomisation in the Transmit  
times. When the Transponder exits the  
ROUND_STANDBY state, it will wait until the  
next internally generated slot time before re-  
enabling its data transmit circuitry.  
RESET_TO_READY  
Moves the Transponder from its current state to Moves the Transponder from its current state  
READY state.  
to READY state.  
MUTE – this is not an actual  
command but is an implied  
command derived from the first  
low-going pulse of any command.  
Not used.  
The Transponder will move to the  
ROUND_STANDBY state upon reception of  
the first low-going pulse of any command.  
This could be any single pulse or the first  
pulse of the SOF of a valid command. The  
Transponder will continue to decode the  
command and if the pulse turns out to be part  
of a valid command, the Transponder will  
move to either the READY or the  
ROUND_ACTIVE state depending on the  
actual command and the command  
parameters. If the WUS bit = 0 the  
Transponder will automatically leave the  
ROUND_STANDBY state after a timeout  
period of 2.5 X 176 tag bit periods has  
elapsed since the last MUTE command (176  
bits = maximum Data Message length).This  
timeout will be reset each time a new implied  
MUTE command is received.  
Table 6– Command Operations  
10  
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Copyright © 2005, EM Microelectronic-Marin SA  
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