MAX66120 MAXIM [Maxim Integrated Products], MAX66120 Datasheet - Page 20

• Manufacturer Part Number: MAX66120
• Description: ISO 15693-Compliant 1Kb Memory Fob Powered Entirely Through the RF Field
• Manufacturer: MAXIM [Maxim Integrated Products]

ISO 15693-Compliant 1Kb Memory Fob
Figure 17. CRC-16-CCITT Generator
20
SYMBOL
CRC-16
WDSF
WAFI
LDSF
RMB
[UID]
WSB
CRB
LAFI
RSB
RQF
GSY
LBL
SOF
EOF
RSF
______________________________________________________________________________________
X
X
0
8
Command “Get System Information”
Command “Write Single Block”
Command “Lock Block”
Command “Read Single Block”
Command “Read Multiple Blocks”
Command “Custom Read Block”
Command “Write AFI”
Command “Lock AFI”
Command “Write DSFID”
Command “Lock DSFID”
Start of Frame
Request Flags byte (always sent by master)
Transmission of an inverted CRC-16 (2 bytes)
generated according to CRC-16-CCITT
End of Frame
Response Flags byte (always sent by slave)
The tag’s unique 8-byte identification number;
could be sent by either the master or the slave.
The brackets [ ] indicate that the transmission
of the UID depends on the request flags (RQF).
STAGE
STAGE
Command-Specific ISO 15693 Communication Protocol—Legend
MSb
1ST
9TH
X
X
1
9
STAGE
STAGE
10TH
2ND
DESCRIPTION
X
X
10
2
STAGE
STAGE
11TH
3RD
X
X
11
3
STAGE
STAGE
12TH
4TH
POLYNOMIAL = X
X
4
STAGE
5TH
16
+ X
X
12
12
SYMBOL
+ X
MDATA
BDATA
DSFID
NBLK
ERRC
#BLK
SECS
INTB
IFLG
MBS
MFG
SBN
5
STAGE
ICR
AFI
BN
13TH
+ 1
X
13
Info Flags byte (always sent by slave)
Application Family Identifier byte
X
Data Storage Format Identifier byte
Number of Blocks byte (slave memory size
indicator)
Memory Block Size byte (slave memory block
size)
IC Reference byte (slave chip revision)
Manufacturer Code byte (2Bh)
Error Code byte (see Table 5)
New Block Data (8 bytes)
Buffer Data (8 bytes)
Memory Data (8 bytes)
Block Security Status byte
Starting Block Number byte
Number of Blocks to Read byte
2 Integrity bytes (block write cycle counter)
5
STAGE
14TH
STAGE
6TH
X
14
X
6
STAGE
15TH
STAGE
DESCRIPTION
7TH
X
15
X
INPUT DATA
7
STAGE
16TH
LSb
STAGE
8TH
X
16