DEMOKITCRX14 STMicroelectronics, DEMOKITCRX14 Datasheet - Page 12

• Manufacturer Part Number: DEMOKITCRX14
• Description: RFID EVALUATION KIT ISO14443-B
• Manufacturer: STMicroelectronics
• Type: Development kitr

Specifications of DEMOKITCRX14

• Contents: CD-ROM, CRX14 Board, USB Transceiver, Samples and Documentation
• Processor To Be Evaluated: CRX14
• Interface Type: I2C
• Operating Supply Voltage: 5 V
• For Use With/related Products: CRX14
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3704

CRX14 registers
3
Table 2.
3.1
12/47
00h
01h
02h
03h
04h
05h
Address
Parameter Register
Input/output Frame Register
Authenticate Register
Slot Marker Register
ST Reserved
ST Reserved
CRX14 registers
The CRX14 chip coupler contains six volatile registers. It is entirely controlled, at both digital
and analog level, using the four 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.
CRX14 control registers
Parameter register (00h)
The Parameter Register is an 8-bit volatile register used to configure the CRX14, and thus,
to customize the circuit behavior. The Parameter Register is located at the I²C address 00h
and it is accessible in I²C Read and Write modes. Its default value, 00h, puts the CRX14 in
standard ISO14443 type-B configuration.
Table 3.
b
b
Bit
0
1
Parameter Register
Input/Output Frame Register
Authentication Register
Slot Marker Register
Frame Standard
RFU
Parameter register bits description
Control
1 Byte
36 Bytes
NA
1 Byte
NA
NA
Length
0
Value
0
1
Doc ID 8880 Rev 4
RFU
Not used
ISO14443 type-B frame management
W
R
W
R
W
R
W
R
R and W
R and W
Access
(1)
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
Start the Authentication process
Get the Authentication status
Launch the automated anti-collision process
from Slot_0 to Slot_15
Return data FFh
ST Reserved. Must not be used
ST Reserved. Must not be used
Description
Purpose
Table
2:
CRX14