CRX14-MQP/1GE STMicroelectronics, CRX14-MQP/1GE Datasheet - Page 26

• Manufacturer Part Number: CRX14-MQP/1GE
• Description: IC TYPE-B CHIP I2C ECO 16-SOIC N
• Manufacturer: STMicroelectronics

Specifications of CRX14-MQP/1GE

• Rf Type: Transceiver
• Frequency: 13.56MHz
• Features: ISO14443-B
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• For Use With: 497-3704 - RFID EVALUATION KIT ISO14443-B
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5720-2; 497-5720-2; 497-5720-5

CRX14 ISO14443 type-B radio frequency data transfer
6
6.1
Figure 19. Wave transmitted using ASK modulation
6.2
26/47
10% ASK MODULATION
OF THE 13.56MHz WAVE,
GENERATED ON THE CRX14
ANTENNA
10% ASK MODULATION
OF THE 13.56MHz WAVE,
GENERATED BY THE RF OUT
DRIVER
DATA BIT TRANSMITTED
BY THE CRX14
CRX14 ISO14443 type-B radio frequency data
transfer
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 by the
external oscillator and by the request frame generator. The CRX14 can be directly
connected to an external matching circuit to generate a 13.56MHz sinusoidal carrier
frequency on its antenna.
The current driven into the antenna coil is directly generated by the CRX14 RFOUT output
driver.
If the antenna is correctly tuned, it emits an H-field of a large enough magnitude to power a
contactless PICC from a short distance. The energy received on the PICC antenna is
converted to a Power Supply Voltage by a regulator, and turned into data bits by the ASK
demodulator. The CRX14 amplitude modulates the 13.56MHz wave by 10% as represented
in
Transmission format of request frame characters
The CRX14 transmits characters of 10 bits, with the Least Significant Bit (b
first, as shown in
Several 10-bit characters, preceded by the Start Of Frame (SOF) and followed by the End Of
Frame (EOF), constitute a Request Frame, as shown in
A Request Frame includes the SOF, instructions, addresses, data, CRC and the EOF as
defined in the ISO14443 type-B.
Each bit duration is called an Elementary Time Unit (ETU). One ETU is equal to 9.44µs
(1/106kHz).
Figure
19. The data transfer rate is 106 kbit/s.
Figure
20.
Transfer time for one data bit is 1/106 kHz
Doc ID 8880 Rev 4
Figure
26.
0
) transmitted
CRX14
AI10912