Product data

MFRC631 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet
COMPANY PUBLIC
Rev. 3.3 — 4 February 2014
227433 59 of 120
NXP Semiconductors
MFRC631
High performance ISO/IEC 14443 A/B reader solution
9.2 Command configuration
9.2.1 Command
Starts and stops command execution.
9.3 SAM configuration register
9.3.1 HostCtrl
Via the HostCtrl Register the interface access right can be controlled
Table 41. Command register (address 00h)
Bit 7 6 5 4 3 2 1 0
Symbol Standby Modem
Off
RFU Command
Access
rights
dy r/w - dy
Table 42. Command bits
Bit Symbol Description
7 Standby Set to 1, the IC is entering power-down mode.
6 ModemOff Set to logic 1, the receiver and the transmitter circuit is powering down.
5RFU -
4 to 0 Command Defines the actual command for the MFRC631.
Table 43. HostCtrl register (address 01h);
Bit 7 6 5 4 3 2 1 0
Symbol RegEn BusHost BusSAM RFU SAMInterface SAMInterface RFU RFU
Access
rights
dy r/w r/w - r/w r/w - -
Table 44. HostCtrl bits
Bit Symbol Description
7 RegEn If this bit is set to logic 1, the register can be changed at the next
register access. The next write access clears this bit automatically.
6 BusHost Set to logic 1, the bus control enables the host interface. This bit
cannot be set together with BusSAM. This bit can only be set if the bit
RegEn is previously set.
5 BusSAM Set to logic 1, the bus control enables the SAM interface. This bit
cannot be set together with BusHost. This bit can only be set if the bit
RegEn is previously set.
4RFU -
3 to 2 SAMInterface 0h:Interface switched off
1h:Interface SPI active
2h:Interface I
2
CL active
3h:Interface I
2
C
1 to 0 RFU -