CR14-MQP/1GE STMicroelectronics, CR14-MQP/1GE Datasheet - Page 28

• Manufacturer Part Number: CR14-MQP/1GE
• Description: IC TYPE-B CHIP I2C ECO 16-SOIC N
• Manufacturer: STMicroelectronics

Specifications of CR14-MQP/1GE

• Rf Type: Transceiver
• Frequency: 13.56MHz
• Features: ISO14443-B
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Pin Count: 16
• Screening Level: Commercial
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5719-1; 497-5719-1; 497-5719-5

CR14 ISO14443 type-B radio frequency data transfer
6.5
Figure 23. Wave received using BPSK sub-carrier modulation
6.6
28/47
1/847kHz
V RFIN
Input RF data transfer from the PICC to the CR14 (answer
frame)
The CR14 uses the ISO14443 type-B retro-modulation scheme which is demodulated and
decoded by the RF
The modulation is obtained by modifying the PICC current consumption (load modulation).
This load modulation induces an H-field variation, by coupling, that is detected by the CR14
RF
and decodes the information received from the PICC.
Data must be transmitted using a 847kHz, BPSK modulated sub-carrier frequency, f
shown in
(from ‘0’ to ‘1’ or from ‘1’ to ‘0’) are encoded by phase shift keying the sub-carrier.
Transmission format of answer frame characters
The PICC should use the same character format as that used for output data transfer (see
Figure
An Answer Frame includes the SOF, data, CRC and the EOF, as illustrated in
data transfer rate is 106 kbit/s.
The CR14 will also accept Answer Frames that do not contain the SOF and EOF delimiters,
provided that these Frames are correctly set in the Parameter Register. (See
IN
input as a voltage variation on the antenna. The RF
20).
Figure
23, and as specified in ISO14443 type-B. In BPSK, all data state transitions
IN
circuitry.
phase shift
1/106kHz
Doc ID 11922 Rev 2
V OFFSET
V
RET
IN
input demodulates this variation
V DYN
PICC data bit to be transmitted
to the CR14.
847kHz BPSK, resulting signal
generated by the PICC for the
load modulation.
t
Load modulation effect on
the H-Field received on the
CR14 RF IN input pad
Figure
Figure
26. The
S
26).
, as
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CR14