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CR14 Datasheet(PDF) 5 Page - STMicroelectronics

Part No. CR14
Description  Low Cost ISO14443 type-B Contactless Coupler Chip with Anti-Collision and CRC Management
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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CR14
5/46
List of figures
Figure 1.
Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 2.
Logic Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 3.
SO Pin Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Figure 4.
CR14 Application Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 5.
Maximum RL Value versus Bus Capacitance (CBUS) for an I
²C Bus . . . . . . . . . . . . . . . . . 11
Figure 6.
I²C Bus Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 7.
CR14 I²C Write Mode Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 8.
I²C Polling Flowchart using ACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 9.
CR14 I²C Read Modes Sequences . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 10.
Host-to-CR14 Transfer: I²C Write to Parameter Register . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 11.
CR14-to-Host Transfer: I²C Random Address Read from Parameter Register . . . . . . . . . 22
Figure 12.
CR14-to-Host Transfer: I²C Current Address Read from Parameter Register . . . . . . . . . . 22
Figure 13.
Host-to-CR14 Transfer: I²C Write to Input/Output Frame Register for ISO14443B . . . . . . 23
Figure 14.
CR14-to-Host Transfer: I²C Random Address Read from Input/Output Frame
Register for ISO14443B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 15.
CR14-to-Host Transfer: I²C Current Address Read from I/O Frame Register
for ISO14443B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 16.
Host-to-CR14 Transfer: I²C Write to Slot Marker Register . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 17.
CR14-to-Host Transfer: I²C Random Address Read from Slot Marker Register . . . . . . . . 25
Figure 18.
CR14-to-Host Transfer: I²C Current Address Read from Slot Marker Register . . . . . . . . . 25
Figure 19.
Wave Transmitted using ASK Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 20.
CR14 Request Frame Character Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 21.
Request Start Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 22.
Request End Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 23.
Wave Received using BPSK Sub-carrier Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 24.
Answer Start Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 25.
Answer End Of Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 26.
Example of a Complete Transmission Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 27.
CRC Transmission Rules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 28.
Standard TAG Command: Request Frame Transmission . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 29.
Standard TAG Command: Answer Frame Reception. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 30.
Standard TAG Command: Complete TAG Access Description . . . . . . . . . . . . . . . . . . . . . 32
Figure 31.
Anti-Collision ST short range memory Sequence (1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 32.
Anti-Collision ST short range memory Sequence Continued . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 33.
I²C AC Testing I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 34.
I²C AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 35.
CR14 Synchronous Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 36.
SO16 Narrow - 16 lead Plastic Small Outline, 150 mils body width, Package Outline . . . . 42




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