DEMOKITCRX14 STMicroelectronics, DEMOKITCRX14 Datasheet - Page 27

• 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
6.3
6.4
Figure 20. CRX14 request frame character format
Table 7.
Request start of frame
The Start Of Frame (SOF) described in
●
●
●
●
Figure 21. Request start of frame
Request end of frame
The End Of Frame (EOF) shown in
●
●
●
Figure 22. Request end of frame
b
b
b
0
1
9
to b
Bit
a falling edge,
followed by ten Elementary Time Units (ETU) each containing a logical ‘0’
followed by a single rising edge
followed by two ETUs, each containing a logical ‘1’.
a falling edge,
followed by ten Elementary Time Units (ETU) containing each a logical ‘0’,
followed by a single rising edge.
8
ETU
Start bit used to synchronize the transmission
Information Byte (instruction, address or data)
Stop bit used to indicate the end of the character
ETU
1
CRX14 request frame character format
b 0
ETU
0
Start
b0
'0'
b 1
b 0
0
0
LSB
b1
b 1
0
b 2
0
b2
b 2
0
Description
b 3
0
Doc ID 8880 Rev 4
b 3
b3
0
CRX14 ISO14443 type-B radio frequency data transfer
b 4
0
Information Byte
Figure 22
b 4
0
b4
Figure 21
b 5
0
b 5
0
b5
b 6
0
consists of:
b 6
0
b6
consists of:
b 7
b 7
0
0
b7
b 8
0
b 8
0
MSB Stop
b8
b
Information Byte is sent Least
Significant Bit first
b
b 9
0
0
9
b 9
0
= 0
= 1
b9
'1'
b 10
1
b 11
1
Value
ai09252
ai09250
ai09251
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