CR14 STMicroelectronics, CR14 Datasheet - Page 12

• Manufacturer Part Number: CR14
• Description: Low Cost Iso14443 Type-b Contactless Coupler Chip With Anti-collision And Crc Management
• Manufacturer: STMicroelectronics

3 CR14 registers
3
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CR14 registers
The CR14 chip coupler contains six volatile registers. It is entirely controlled, at both digital and
analog level, using the three registers listed below and shown in
The other 3 registers are located at addresses 02h, 04h and 05h. They are “ST Reserved”, and
must not be used in end-user applications.
In the I²C protocol, all data Bytes are transmitted Most Significant Byte first, with each Byte
transmitted Most significant bit first.
Table 2.
Address
00h
01h
02h
03h
04h
05h
Parameter Register
Input/Output Frame Register
Slot Marker Register
Parameter Register
Input/output Frame
Register
ST Reserved
Slot Marker Register
ST Reserved
ST Reserved
CR14 Control Registers
NA
NA
NA
1 Byte
36 Bytes
1 Byte
Length
W
R
W
R
W
R
W
R
R and W ST Reserved. Must not be used
R and W ST Reserved. Must not be used
Access
Set parameter register
Read parameter register
Store and send request frame to the PICC.
Wait for PICC answer frame
Transfer PICC answered frame data to Host
ST Reserved, must not be used.
Launch the automated anti-collision
process from Slot_0 to Slot_15
Return data FFh
Table
2:
Purpose
CR14