CLRC63201T/0FE,112 NXP Semiconductors, CLRC63201T/0FE,112 Datasheet - Page 90

• Manufacturer Part Number: CLRC63201T/0FE,112
• Description: IC I.CODE HS READER 32-SOIC
• Manufacturer: NXP Semiconductors
• Series: I-Coder

Specifications of CLRC63201T/0FE,112

• Rf Type: Read Only
• Frequency: 13.56MHz
• Features: ISO14443-A, ISO14443-B, ISO15693, ISO18000-3
• Package / Case: 32-SOIC (0.300", 7.50mm Width)
• Product: RFID Readers
• Operating Temperature Range: - 25 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 568-2199-5; 935269690112; CLRC632; CLRC63201TD

NXP Semiconductors
CLRC632_35
Product data sheet
PUBLIC
11.3.2.4 Communication errors
To distinguish between a 1-bit or 0-bit from a bit-collision, the RxThreshold register’s
CollLevel[3:0] value is used. If the amplitude of the half-bit with smaller amplitude is larger
than defined by CollLevel[3:0], a bit-collision is flagged by setting the CollErr error flag.
The receiver continues receiving the incoming data stream independently from the
detected collision. In case of a bit-collision, the decoder forwards logic 1 at the collision
position.
Remark: As an exception, if bit ZeroAfterColl is set, all bits received after the first
bit-collision are forced to zero, regardless of whether a bit-collision or an unequivocal state
has been detected. This feature makes it easier for the software to carry out the
anti-collision procedure as defined in ISO/IEC 15693.
When the first bit-collision in a frame is detected, the bit position of the collision is stored in
the CollPos register.
The collision positions are shown in
Table 145. Return values for bit-collision positions
If a collision is detected in the SOF, a frame error is reported and no data is sent to the
FIFO buffer. In this case the receiver continues to monitor the incoming signal and
generates the correct notifications to the microprocessor when the end of the faulty input
stream is detected. This helps the microprocessor to determine the time when it is next
allowed to send data to the label.
Table 146
Table 146. Communication error table
Collision in bit
SOF
Least Significant Bit (LSB) of the Least Significant Byte (LSByte)
…
Most Significant Bit (MSB) of the LSByte
LSB of second byte
…
MSB of second byte
LSB of third byte
…
Cause
Received data did not start with a SOF pattern
CRC block is not equal to the expected value
Received data is shorter than the CRC block
A collision is detected
shows the events that set error flags.
Rev. 3.5 — 10 November 2009
Multiple protocol contactless reader IC (MIFARE/I-CODE1)
073935
Table
145.
Bit set
FramingErr
CRCErr
CRCErr
CollErr
CollPos register value
(Decimal)
0
1
…
8
9
…
16
17
…
CLRC632
© NXP B.V. 2009. All rights reserved.
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