CLRC632 Datasheet, PDF (52/163 Pages) NXP Semiconductors – Multiple Protocol Contactless Reader IC

Philips Semiconductors
Multiple Protocol Contactless Reader IC
Product Specification Rev. 3.0; May 2003
CL RC632
5.2.5.3 ChannelRedundancy Register
Selects kind and mode of checking the data integrity on the RF-channel.
Name: ChannelRedundancy
Address: 0x22
Reset value: 00000011, 0x03
7
0
Access
r/w
Rights
6
5
4
3
2
1
0
0
CRC CRC8 RxCRCEn TxCRCEn ParityOdd ParityEn
3309
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Description of the bits
Bit
Symbol
7-6
00
5
CRC3309
4
CRC8
3
RxCRCEn
2
TxCRCEn
1
ParityOdd
0
ParityEn
Function
This value shall not be changed
If set to 1, CRC-calculation is done according ISO/IEC3309 (ISO14443B) and ISO
15693.
Note: For usage according to ISO14443A this bit has to be 0.
For usage according to I•CODE1 this bit has to be 0.
If set to 1, an 8-bit CRC is calculated.
If set to 0, a 16-bit CRC is calculated.
If set to 1, the last byte(s) of a received frame is/are interpreted as CRC byte/s.
If the CRC itself is correct the CRC byte(s) is/are not passed to the FIFO.
In case of an error, the CRCErr flag is set.
If set to 0, no CRC is expected.
If set to 1, a CRC is calculated over the transmitted data and the CRC byte(s) are
appended to the data stream.
If set to 0, no CRC is transmitted.
If set to 1, an odd parity is generated or expected, respectively.
If set to 0 an even parity is generated or expected, respectively.
Note: For usage according to ISO14443-A this bit has to be 1.
If set to 1, a parity bit is inserted in the transmitted data stream after each byte
and expected in the received data stream after each byte (MIFARE^®, ISO14443A)
If set to 0, no parity bit is inserted or expected (ISO14443B)
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