mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 55

• Manufacturer Part Number: mfrc531
• Description: Iso/iec 14443 Reader Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
10.5.2.5 TimerValue register
10.5.2.6 CRCResultLSB register
10.5.2.7 CRCResultMSB register
Value of the timer.
Table 61.
Table 62.
LSB of the CRC coprocessor register.
Table 63.
Table 64.
MSB of the CRC coprocessor register.
Table 65.
Table 66.
Bit
Symbol
Access
Bit
7 to 0
Bit
Symbol
Access
Bit
7 to 0
Bit
Symbol
Access
Bit
7 to 0
Symbol
CRCResultLSB[7:0] gives the CRC register’s least significant byte value; only valid if
Symbol
CRCResultMSB[7:0]
Symbol
TimerValue[7:0]
TimerValue register (address: 0Ch) reset value: xxxx xxxxb, xxh bit allocation
TimerValue register bit descriptions
CRCResultLSB register (address: 0Dh) reset value: xxxx xxxxb, xxh bit
allocation
CRCResultLSB register bit descriptions
CRCResultMSB register (address: 0Eh) reset value: xxxx xxxxb, xxh bit
allocation
CRCResultMSB register bit descriptions
7
7
Rev. 3.4 — 26 January 2010
7
Description
this register shows the timer counter value
6
Description
CRCReady = logic 1
6
056634
Description
gives the CRC register’s most significant byte value; only valid if
CRCReady = logic 1.
The register’s value is undefined for 8-bit CRC calculation.
6
5
5
5
CRCResultMSB[7:0]
4
CRCResultLSB[7:0]
TimerValue[7:0]
4
4
R
R
3
R
3
3
2
ISO/IEC 14443 reader IC
2
2
MFRC531
© NXP B.V. 2010. All rights reserved.
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