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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  
NOTES:  
SIGNATURE value as sent by the tag to the Reader  
as part of its transmission. In all other cases the  
"Next_Slot" command will be accepted as  
"Next_Slot (Not OK)".  
Tags will automatically start a new round without a  
"Begin_Round", "New Round", "Init_Round" or  
"Init_Round_All" command when they receive a  
"Next_Slot" or "Close_Slot" command while their  
internal "Current Slot Counter" indicates the last slot  
in the current round. This will also apply to tags  
being moved from the ROUND_STANDBY state to  
the ROUND_ACTIVE state by a "Next_Slot" or  
"Close_Slot" command.  
ƒ
Commands marked with the "#" character will place  
tags in the "ISO" mode of operation. These are the  
"Begin_Round", "Init_Round"  
commands.  
& "Init_Round_All"  
ƒ
ƒ
ƒ
ƒ
The "Wake_Up_FST" command marked with the  
"@" character will place tags in the "FST" mode of  
operation.  
The last Mask selection made in the "ISO" mode  
will be retained when switching from the "ISO" to  
the "FST" mode.  
"Next_Slot(OK)" will only occur when the tag  
receiving the "Next_Slot" command receives the  
command in the command window immediately  
following its transmission to the Reader and if the  
"Next_Slot" command contained the same  
Tag state storage  
Note: Implementation of the Quiet state storage may  
imply that the Transponder will retain this condition  
during a time greater than 2s, up to several minutes in  
low temperature conditions. The Reset_to_Ready  
command overrides the Quiet state under these  
circumstances.  
In the case where the Transponder loses the energizing  
field for short periods of time (eg. when moving), the  
Transponder retains its state for at least 300µs. In  
addition, if the Transponder is in the Quiet state, it retains  
its Quiet state for at least 2s.  
State  
Description  
Commands to which responsive  
The Transponder is out of the RF field  
or the Reader Tx Carrier is switched  
off.  
RF field off  
None.  
The Transponder is in an RF field, its  
clock is running and it is waiting for a  
command.  
Wake-Up_FST, Init-Round-All, Init-  
Round, Begin-Round  
READY  
None required, responsive to all  
commands according to the collision  
arbitration loop. Standby_Round will  
move the Transponder to the  
ROUND_STANDBY state.  
The Transponder steps through the  
hold-off loop and will transmit if it has  
reached its turn to transmit  
ROUND_ACTIVE  
Next-Slot, Close-Slot, New-round, Init-  
Round, Init-Round-All, Begin-Round,  
Reset-To-Ready, Wake-Up-FST &  
Time-Out  
ROUND_STANDBY  
ROUND_ACTIVE state is suspended  
The Transponder is unresponsive to  
commands and the hold-off loop has  
been suspended. It will only respond  
QUIET (Persistent Sleep)  
to a Reset-To-Ready command or will Reset-To-Ready  
reset when removed from the RF field  
for an extended period of time  
typically greater than 2 seconds.  
Table19 - Transponder States  
24  
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Copyright © 2005, EM Microelectronic-Marin SA  
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