SLRC400 Datasheet, PDF (45/130 Pages) NXP Semiconductors – I·CODE Reader IC

Philips Semiconductors
I•CODE Reader IC
Product Specification Rev. 2.0 November 2001
SL RC400
5.2.5.4 CRCPresetLSB Register
LSB of the preset value for the CRC register.
Name: CRCPresetLSB
Address: 0x23
Reset value: 11111110, 0xFE
7
6
5
4
3
2
1
0
CRCPresetLSB
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Rights
Description of the bits
Bit
Symbol
Function
7-0 CRCPresetLSB CRCPresetLSB defines the starting value for CRC-calculation. This value is
loaded into the CRC at the beginning of transmission, reception and the CalcCRC
Command, if the CRC calculation is enabled.
The Preset value is set for I?CODE1
To use the ISO 15693 functionality the CRCPresetLSB Register has to be set to
0xFF.
5.2.5.5 CRCPresetMSB Register
MSB of the preset value for the CRC register.
Name: CRCPresetMSB
Address: 0x24
Reset value: 11111111, 0xFF
7
6
5
4
3
2
1
0
CRCPresetMSB
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Rights
Description of the bits
Bit
Symbol
Function
7-0 CRCPresetMSB CRCPresetMSB defines the starting value for CRC-calculation. This value is
loaded into the CRC at the beginning of transmission, reception and the CalcCRC
Command, if the CRC calculation is enabled.
Note: The Preset value of CRCPresetMSB Register is the same for I?CODE1 and
ISO 15693.
Note: This register is not relevant, if CRC8 is 1.
45
Preliminary