MCRF200 Microchip Technology Inc., MCRF200 Datasheet - Page 8

• Manufacturer Part Number: MCRF200
• Description: 125 Khz Microid? Passive Rfid Device
• Manufacturer: Microchip Technology Inc.

MCRF200
3.0
The device has two basic modes of operation: Native
mode and Read mode.
3.1
Every unprogrammed blank device (CB12=0) operates
in Native mode, regardless of configuration register
settings:
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
System Design Guide (DS51115) for more information.
FIGURE 3-1:
DS21219H-page 8
To Reader
amplifier/filter
From
Reader
F
CLK
MODES OF OPERATION
Native Mode
/128, FSK, NRZ_L (direct)
TYPICAL APPLICATION CIRCUIT
125 kHz
I
AC
C
L
™
125 kHz RFID
RF Signal
Data
3.2
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.
f
res
L
2.5 mH
=
-------------------
2
Read Mode
1
LC
C
648 pF
=
125 kHz
¤ 2003 Microchip Technology Inc.
Input capacitance: 2 pF
Pad V
Pad V
MCRF200
A
B