DEMOKITCRX14 STMicroelectronics, DEMOKITCRX14 Datasheet
DEMOKITCRX14
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DEMOKITCRX14 Summary of contents
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CRC management and anti-clone function Features ■ Single 5 V ±500 mV supply voltage ■ SO16N package ■ Contactless communication – ISO14443 type-B protocol – 13.56MHz carrier frequency using an external oscillator – 106 Kbit/s data rate – ...
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Contents Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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CRX14 5.5 Addresses above location 06h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ...
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List of tables List of tables Table 1. Signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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CRX14 List of figures Figure 1. Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... Radio-Frequency power and signal interfacing. With it, any ISO14443 type-B PICC products can be powered and have their data transmission controlled via a simple antenna. The CRX14 is fabricated in STMicroelectronics High Endurance Single Poly-silicon CMOS technology. The CRX14 is organized as 4 different blocks (see ● ...
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CRX14 Figure 1. Logic diagram Table 1. Signal names Signal RF OUT RF IN OSC1 OSC2 E0, E1, E2 SDA SCL V CC GND V REF GND_RF REF OSC1 SCL CRX14 SDA GND GND_RF ...
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Summary description Figure 2. Logic block diagram Figure 3. SO pin connections 8/ REF CRX14 OSC1 SCL SDA GND GND_RF SO16 1 V REF ...
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CRX14 2 Signal description See Figure 1: Logic connected to this device. 2.1 Oscillator (OSC1, OSC2) The OSC1 and OSC2 pins are internally connected to the on-chip oscillator circuit. The OSC1 pin is the input pin, the OSC2 is the ...
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Signal description 2.6 Serial data (SDA) The SDA signal is bi-directional used to transfer I²C data in and out of the CRX14 open drain output that may be wire-OR’ed with other open drain or open ...
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CRX14 Figure 5. Maximum R value versus bus capacitance ( BUS fc = 100kHz fc = 400kHz 100 C BUS (pF) Doc ID 8880 Rev 4 Signal description ² ) for an ...
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CRX14 registers 3 CRX14 registers The CRX14 chip coupler contains six volatile registers entirely controlled, at both digital and analog level, using the four registers listed below and shown in ● Parameter Register ● Input/Output Frame Register ● ...
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CRX14 Table 3. Parameter register bits description (continued) Bit Control b Answer Frame Format 2 b ASK Modulation Depth 3 b Carrier Frequency WDG Answer delay watchdog RFU 7 1. RFU = Reserved ...
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... SLOT_MARKER(15), and stores all the identified Chip_IDs into the Input/Output Frame Register (I²C address 01h). This automated anti-collision sequence simplifies the host software development and reduces the time needed to interrogate the 16 slots of the STMicroelectronics anti-collision mechanism. When accessed in I²C Write mode, the Slot Marker Register starts generating the sequence of anti-collision commands ...
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CRX14 Table 5. Slot marker register description Byte 0 Status Slot Status Slot Byte 1 Bit 7 Bit 6 Status Slot Status Slot Byte 2 Bit 15 Bit 14 Byte 3 Byte 4 Byte 5 Byte ...
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CRX14 I²C protocol description 4 CRX14 I²C protocol description The CRX14 is compatible with the I²C serial bus memory standard, which is a two-wire serial interface that uses a bi-directional data bus and serial clock. The CRX14 has a pre-programmed, ...
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CRX14 The CRX14 continuously monitors the SDA and SCL lines for a START condition (except during Radio Frequency data exchanges), and will not respond unless one is sent. 4.2 I²C stop condition STOP is identified by a Low-to-High transition of ...
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CRX14 I²C protocol description Figure 6. I²C bus protocol SCL SDA SCL SDA START CONDITION SCL SDA 4.5 I²C memory addressing To start up communication with the CRX14, the bus master must initiate a START condition. Then, the bus master ...
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CRX14 4.6 CRX14 I²C write operations The bus master sends a START condition, followed by a Device Select Code and the R/W bit set to ’0’. The CRX14 that corresponds to the Device Select Code, acknowledges and waits for the ...
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CRX14 I²C protocol description Figure 8. I²C polling flowchart using ACK First byte of instruction with R already decoded by the CRX14 ReSTART STOP 4.7 CRX14 I²C read operations To send a Read command, the bus master sends ...
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CRX14 After reading each Byte, the CRX14 waits for the master to send an ACK during the 9 time. If the master does not return an ACK within this time, the CRX14 terminates the data transfer and switches to stand-by ...
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Applying the I²C protocol to the CRX14 registers 5 Applying the I²C protocol to the CRX14 registers 5.1 I²C parameter register protocol Figure 10 shows how new data is written to the Parameter Register. The new value becomes active after ...
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CRX14 5.2 I²C input/output frame register protocol Figure 13 shows how to store a PICC request frame command of N Bytes into the Input/Output Frame Register. After the I²C STOP condition, the request frame is RF transmitted in the ISO14443 ...
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... XX X Bus Slave ACK 5.3 I²C authenticate register protocol For information please contact your nearest STMicroelectronics sales office. 5.4 I²C slot marker register protocol An I²C Write command to the Slot Marker Register generates an automated sixteen- command loop (See All the answers from the ST short range memory devices that are detected, are written in the Input/Output Frame Register. Read from the I² ...
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CRX14 Figure 17. CRX14-to-host transfer: I²C random address read from slot marker register Device Select Bus Master R Code CRX14 Read Bus Slave Figure 18. CRX14-to-host transfer: I²C current ...
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CRX14 ISO14443 type-B radio frequency data transfer 6 CRX14 ISO14443 type-B radio frequency data transfer 6.1 Output RF data transfer from the CRX14 to the PICC (request frame) The CRX14 output buffer is controlled by the 13.56MHz clock signal generated ...
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CRX14 Figure 20. CRX14 request frame character format 1 Start ETU Table 7. CRX14 request frame character format Bit b Start bit used to synchronize the transmission Information Byte (instruction, address or data ...
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CRX14 ISO14443 type-B radio frequency data transfer 6.5 Input RF data transfer from the PICC to the CRX14 (answer frame) The CRX14 uses the ISO14443 type-B retro-modulation scheme which is demodulated and decoded by the RF The modulation is obtained ...
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CRX14 6.7 Answer start of frame The PICC SOF must be compliant with the ISO14443 type-B, and is shown in ● Ten or eleven Elementary Time Units (ETU) each containing a logical ‘0’, ● Two ETUs containing a logical ‘1’. ...
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CRX14 ISO14443 type-B radio frequency data transfer Figure 26. Example of a complete transmission frame SOF Cmd Data Sent by the CRX14 12 bits 10 bits 10 bits at 106Kb Case of Answer Frame with SOF & EOF ...
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CRX14 7 Tag access using the CRX14 coupler In all the following I²C commands, the last three bits of the Device Select Code can be replaced by any of the three-bit binary values (000, 001, 010, 011, 100, 101, 110, ...
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Tag access using the CRX14 coupler Figure 29. Standard TAG command: answer frame reception TAG TAG TAG TAG SOF Data Data Data I²C RF SOF Data 1 Data 2 Data Figure 30. Standard TAG command: complete TAG access description Device ...
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CRX14 Figure 31. Anti-collision ST short range memory sequence (1) S Slot S T Device CRX14 Marker T A Select SOF Register R O Code Address P T I²C 03h RF Slot 0 SOF CRX14 SOF I²C RF... Slot 1 ...
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Tag access using the CRX14 coupler Figure 32. Anti-collision ST short range memory sequence continued I²C RF ... Slot 10 SOF I²C RF ... Slot 11 SOF I²C RF ... Slot 12 SOF I²C RF ... Slot 13 SOF I²C ...
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... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. ...
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DC and AC parameters 9 DC and AC parameters This section summarizes the operating and measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC Characteristic tables that follow are derived from ...
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CRX14 Table 11. I²C DC characteristics (continued) Symbol I Supply Current CC I Supply Current (Stand-by) CC1 Input Low Voltage (SCL, SDA Input Low Voltage (E0, E1, E2) Input High Voltage (SCL, SDA Input High Voltage ...
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DC and AC parameters Table 12. I²C AC characteristics Symbol Alt. t CH1CH2 t R (1) ( CL1CL2 (1 t DH1DH2 ( DL1DL2 ( SU:STA CHDX t t CHCL ...
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CRX14 Figure 35. CRX14 synchronous timing RF OUT ASK Modulated Signal V RFOUT A t POR FRAME transmission between the reader and the contactless device DATA 1 FRAME transmitted by the PICC in BPSK ...
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DC and AC parameters Table 13 characteristics (continued) OUT Symbol Parameter t Answer delay watchdog (b WDG t Answer delay watchdog (b WDG t Answer delay watchdog (b WDG t Answer delay watchdog (b WDG t Time Between ...
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CRX14 10 Package mechanical In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is ...
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Package mechanical Figure 36. SO16 narrow - 16 lead plastic small outline, 150 mils body width, package outline 1. Drawing is not to scale. Table 15. SO16 narrow - 16 lead plastic small outline, 150 mils body width, package mechanical ...
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CRX14 11 Ordering information Table 16. Ordering information scheme Example: Device type CRX14 Package MQ = SO16 Narrow (150 mils width) MQP = SO16 Narrow (150 mils width) ECOPACK® Customer code XXX = Given by the issuer For a list ...
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ISO14443 type B CRC calculation Appendix A ISO14443 type B CRC calculation #include <stdio.h> #include <stdlib.h> #include <string.h> #include <ctype.h> #define BYTEunsigned char #define USHORTunsigned short unsigned short UpdateCrc(BYTE ch, USHORT *lpwCrc (ch^(BYTE)((*lpwCrc) & 0x00FF)); ch = ...
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CRX14 printf("CRC_B of [ "); for(i=0; i<4; i++) printf("%02X ",BuffCRC_B[i]); ComputeCrc(BuffCRC_B, 4, &First, &Second); printf("] Transmitted: %02X then %02X.", First, Second); return(0); } ISO14443 type B CRC calculation Doc ID 8880 Rev 4 45/47 ...
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Revision history Revision history Table 17. Document revision history Date 04-Aug-2004 23-Feb-2005 21-Jul-2005 01-Apr-2010 46/47 Revision 1.0 First issue 2.0 Document put into new template. Added Package information in 3.0 scheme. Updated Table 15: SO16 narrow - 16 lead plastic ...
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... CRX14 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...