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Part Name
Description
MCRF450/WB View Datasheet(PDF) - Microchip Technology
Part Name
Description
Manufacturer
MCRF450/WB
13.56 MHz Read/Write Passive RFID Device
Microchip Technology
MCRF450/WB Datasheet PDF : 50 Pages
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MCRF450/451/452/455
FIGURE 6-1:
ANTI-COLLISION FLOW CHART
DETECTION
Power-up
in Tuned State
TC=0
Set Processing Flag
FR Bit Yes
Set
?
No
REACTIVATION
No
No 1
Talk-First
No
Bit Set?
FRR
No
Command?
PPM
Yes
Symbol?
TC > 0?
Yes
Yes
Clear Position 1 Flag
Decode FRR Command
Yes
Set Position 1 Flag
Listen for FRB Command
Wait 1, 16, or 64 Time Slot
No
FRB
Received?
Yes
Send FRB Response
(Tag ID: Block 1 Data)
Yes
Listening
Window Expired?
No
Receiving?
No
Yes
No
3 PPM
Symbols?
Yes
No 3rd Symbol
=MC2?
Yes
No Correct Matching
Code?
Yes
Send FRR Response
(Tag ID + FRF data)
Listening
Window
Yes
Expired?
No
No
Receiving?
Yes
3 PPM
No
Symbols?
Yes
3rd Symbol
No
=MC1?
No
TCMAX
ELAPSED
Yes
?
Increment
Transmission
Counter (TC)
No
Position 1
Yes
Flag Set?
No
3rd Symbol
=MC2?
PROCESSING
Execute
Command
Yes
No
Processing
Flag Set?
Wait for Commands
Decode Command
at Correct Speed
Yes
Correct
No
Matching
Code?
Yes
No
Valid
Command?
Yes
Yes Read or Write
Command?
No
No
End
Yes
Command?
No
Processing Yes
Flag Set?
Yes
Clear Processing Flag
Correct
Matching
No
Code?
Yes
Set Processing Flag
Maintain
Logic State
(Do not listen to
any command)
SLEEPING
2003 Microchip Technology Inc.
DS40232H-page 19
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