參數(shù)資料
型號(hào)： MCRF200IWFQ23
廠商： Microchip Technology Inc.
英文描述： 125 kHz microID⑩ Passive RFID Device
中文描述： 125千赫microID⑩無(wú)源RFID器件
文件頁(yè)數(shù)： 8/24頁(yè)
文件大?。?/td> 294K
代理商： MCRF200IWFQ23
DS21219H-page 8
2003 Microchip Technology Inc.
3.0
MODES OF OPERATION
The device has two basic modes of operation: Native
mode and Read mode.
3.1
Native Mode
Every unprogrammed blank device (CB12=
0
) operates
in Native mode, regardless of configuration register
settings:
F
CLK
/128, FSK, NRZ_L (direct)
Once the user memory is programmed, the lock bit is
set (CB12=
1
) which causes the MCRF200 to switch
from Native mode to the Communication mode defined
by the configuration register.
Refer to Figure 4-1 for contactless programming
sequence. Also see the
microID
125 kHz RFID
System Design Guide
(DS51115) for more information.
3.2
Read Mode
After the device is programmed (CB12=
1
), the device
is operated in the Read-only mode. The device
transmits its data according to the protocol in the
configuration register.
FIGURE 3-1:
TYPICAL APPLICATION CIRCUIT
Pad V
B
Pad V
A
Input capacitance: 2 pF
RF Signal
Data
C
To Reader
amplifier/filter
From
Reader
I
AC
L
2.5 mH
648 pF
fres
2
π
LC
-------1
125 kHz
=
=
125 kHz
MCRF200
L
C
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