DEMOKITCRX14 STMicroelectronics, DEMOKITCRX14 Datasheet - Page 5

• 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
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
ISO14443B 23
Figure 15.
for ISO14443B 24
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Logic block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SO pin connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CRX14 application schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Maximum R
I²C bus protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
CRX14 I²C write mode sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
I²C polling flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
CRX14 I²C read modes sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Host-to-CRX14 transfer: I²C write to parameter register . . . . . . . . . . . . . . . . . . . . . . . . . . 22
CRX14-to-host transfer: I²C random address read from parameter register . . . . . . . . . . . 22
CRX14-to-host transfer: I²C current address read from parameter register . . . . . . . . . . . 22
Host-to-CRX14 transfer: I²C write to I/O frame register for ISO14443B . . . . . . . . . . . . . . 23
CRX14-to-host transfer: I²C random address read from I/O frame register for
CRX14-to-host transfer: I²C current address read from I/O frame register
Host-to-CRX14 transfer: I²C write to slot marker register . . . . . . . . . . . . . . . . . . . . . . . . . 24
CRX14-to-host transfer: I²C random address read from slot marker register . . . . . . . . . . 25
CRX14-to-host transfer: I²C current address read from slot marker register . . . . . . . . . . . 25
Wave transmitted using ASK modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
CRX14 request frame character format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Request start of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Request end of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Wave received using BPSK sub-carrier modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Answer start of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Answer end of frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Example of a complete transmission frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
CRC transmission rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Standard TAG command: request frame transmission. . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Standard TAG command: answer frame reception . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Standard TAG command: complete TAG access description. . . . . . . . . . . . . . . . . . . . . . . 32
Anti-collision ST short range memory sequence (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Anti-collision ST short range memory sequence continued . . . . . . . . . . . . . . . . . . . . . . . . 34
I²C AC testing I/O waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
I²C AC waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
CRX14 synchronous timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
SO16 narrow - 16 lead plastic small outline, 150 mils body width, package outline. . . . . . 42
L
value versus bus capacitance (C
Doc ID 8880 Rev 4
BUS
) for an I
²
C bus . . . . . . . . . . . . . . . . . . 11
List of figures
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