View CRX14_200082.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

CRX14
Low Cost 13.56MHz / IC Short Range Contactless Coupler Chip with anti-collision, CRC management and anti-clone function
DATA BRIEFING
FEATURES SUMMARY s Single 5V 500mV Supply Voltage
s s
Figure 1. Packages
SO16N package External Oscillator - 13.56MHz Quartz - 32.768kHz Quartz with Frequency Multiplier
s
Contactless Communication - 13.56MHz Carrier Frequency - ISO 14443B - 2 Air Interface Compliant - ISO 14443B - 3 Frame Format Compliant - Support Frame Answer with/without SOF/ EOF - CRC generation and check - France Telecom Function Proprietary Anti-Clone
16 1
SO16 (MQ) 150 mil width
- Automated ST anti-collision exchange
s
IC Communication - Two Wire IC Serial Interface - Supports 400 kHz Protocol - 3 Chip Enable pin - Up to 8 CRX14 connected on the same bus
June 2002
Complete data available under NDA.
1/4
CRX14
SUMMARY DESCRIPTION The CRX14 is a contactless coupler, compliant with the short range ISO14443B standard controlled, using the two wire IC bus. The CRX14 generates a 13.56MHz signal on an external antenna. Transmitted data are modulated using Amplitude Shift Keying (ASK) modulation. Received data are demodulated from the tag load variation signal, generated on the antenna, using Bit Phase Shift Keying (BPSK) coding of an 847kHz sub-carrier. The Transmitted ASK wave is 10% modulated. The Data transfer rate between the CRX14 and the tag is 106Kbit/s in both transmission and reception modes. The CRX14 follows the ISO 14443 part 2 type B recommendation for the radio-frequency power and signal interface. Figure 2. Logic Diagram
authentication capability and to build a system with a high level of security at low cost. Table 1. Signal Names
RF OUT RF IN VCC / GND GND_RF OSC1 / OSC2 PLL_RC Vref OSC_SEL RESET SCL SDA Antenna Output Driver Antenna Input Filter Power Supply & Ground Ground for RF circuitry Oscillator input PLL RC filter Input Transmitter Reference Voltage 13.56MHz/32.768kHz osc select Reset IC Clock IC Bi-Directional Data IC Chip Enable IC Chip Enable IC Chip Enable
CRX14
VCC
Vref
E0 E1
OSC_SEL OSC1 OSC2 PLL_RC RESET SCL SDA E0 E1 E2 Transmitter
RF OUT
E2
Figure 3. SO Connections
I2C Bus RAM Contr- Buffer Receiver oller Antenna CRX14 Vref RF IN E0 E1 E2 RESET PL_RC GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9
AI06827
RF IN
GND
GND_RF
AI06828
The CRX14 targets short range applications which need disposable or secure and re-usable products. The CRX14 includes an automated anti-collision mechanism that allows it to detect and select tags present at the same time within range of the CRX14. The anti-collision is based on the STMicroelectronics probabilistic scanning methodology. The CRX14 provides an anti-clone function from FRANCE TELECOM which allows tag authentication. With the use of the single chip coupler CRX14, it is easy to design a reader with the
VCC RF OUT GND_RF OSC1 OSC2 OSC_SEL SCL SDA
The CRX14 provides a complete analog interface, compliant with the ISO/IEC 14443 recommendations for a radio-frequency power and signal interface. It allows the ISO 14443-2 type B proximity tag to be powered and to have control data transmitted, via a simple antenna. The CRX14 is fabricated with STMicroelectronics High Endurance Single Polysilicon CMOS technology.
2/4
CRX14
The CRX14 is organized in four blocks: - The IC bus controller handles the serial connection with the application host. It is compliant with the 400kHz IC bus specification and it controls the read/write access to all the CRX14 registers. - The RAM buffer is bi-directional. It stores all the request frame bytes to be transmitted to the tag and all received bytes send by the tag on the answer frame. - The transmitter powers all the contactless tags, within range, by generating a RF magnetic field at 13.56MHz on an external antenna. The field is 10% modulated using ASK (amplitude shift keying) modulation for outgoing data. - The receiver demodulates the signal generated Table 2. CRX14 Control Registers
I2C Address 00h Parameters register R W 01h Input/Output frame register R W 02h Authenticate register R W 03h Slot Marker register R Not Applicable. Return data FFh. Get the Authenticate status Launch the automated anti-collision process Read parameter register Store and send request frame to the tag. Store tag answer frame Transfer register content to Host Start the Authenticate process Access W Purpose Set parameter register
on the antenna by the load variation of the contactless tag. The resulting signal is decoded by a 847KHz BPSK (binary phase shift keying) sub-carrier decoder. The CRX14 is designed to be connected to a digital host (Microcontroller or ASIC) which has to manage all the communication protocol in both transmit and receive mode through the IC serial bus.
CRX14 DEVICE OPERATION The CRX14 chip coupler provides four volatile registers. They control all the behaviour of the device and are described in Table 2.
PART NUMBERING For a list of available options (speed, package, etc.) or for further information on any aspect of this Table 3. Ordering Information Scheme
Example: Device Type CRX14 Package MQ = SO16 (150 mil width) Customer Code XX = Given by the issuer CRX14
device, please contact your nearest ST Sales Office.
-
MQ
/
XX
3/4
CRX14
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is registered trademark of STMicroelectronics All other names are the property of their respective owners (c) 2002 STMicroelectronics - All Rights Reserved STMicroelectronics group of companies Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States. www.st.com
4/4

▲Up To Search▲

Price & Availability of CRX14

	To Download CRX14 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .