CRX14_10 Datasheet, PDF (34/47 Pages) STMicroelectronics – ISO14443 type-B contactless coupler chip with anti-collision, CRC management and anti-clone function

Tag access using the CRX14 coupler
CRX14
Figure 32. Anti-collision ST short range memory sequence continued
I²C
RF ...
Slot 10
SOF
96h
CRC CRC EOF t0 t1 SOF
Chip_ID CRC CRC EOF
<--> <-->
I²C
RF ...
Slot 11
SOF
56h
CRC CRC EOF t0 t1 SOF
Chip_ID CRC CRC EOF
<--> <-->
I²C
RF ...
Slot 12
SOF
66h
CRC CRC EOF t0 t1 SOF
Chip_ID CRC CRC EOF
<--> <-->
I²C
RF ...
Slot 13
SOF
76h
CRC CRC EOF t0 t1 SOF
Chip_ID CRC CRC EOF
<--> <-->
I²C
RF ...
Slot 14
SOF
86h
CRC CRC EOF t0 t1 SOF
Chip_ID CRC CRC EOF
<--> <-->
I²C
RF ...
Slot 15
R
E
S
T _Device
A _Select
R _Code
T
S
I/O
Register
Address
T
A
R
T
Device
Select
Code
I²C ...
01h
SOF
96h
CRC CRC EOF t0 t1 SOF
Chip_ID CRC CRC EOF
<--> <-->
Answer Status Status Slot 0 Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6 Slot 7 Slot 8
Frame Slot Bits Slot Bits Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID
Length b0 to b7 b8 to b15 Answer Answer Answer Answer Answer Answer Answer Answer Answer
12h Status Status Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID
RF
Slot 9
Chip_ID
Answer
Slot 10
Chip_ID
Answer
Slot 11
Chip_ID
Answer
Slot 12
Chip_ID
Answer
Slot 13
Chip_ID
Answer
Slot 14
Chip_ID
Answer
Slot 15
Chip_ID
Answer
S
T
O
P
I²C ... Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID Chip_ID
RF
ai09264
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Doc ID 8880 Rev 4