mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 53

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

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
10.5.2.1 Page register
10.5.2.2 Control register
10.5.2.3 ErrorFlag register
10.5.2 Page 1: Control and status
Selects the page register; see
Various control flags, for timer, power saving, etc.
Table 55.
Table 56.
Error flags show the error status of the last executed command.
Table 57.
Table 58.
Bit
Symbol
Access
Bit
7 to 6
5
4
3
2
1
0
Bit
Symbol
Access
Bit
7
6
Symbol
0
KeyErr
Symbol
00
StandBy
PowerDown
Crypto1On
TStopNow
TStartNow
FlushFIFO
7
Control register (address: 09h) reset value: 0000 0000b, 00h bit allocation
Control register bit descriptions
ErrorFlag register (address: 0Ah) reset value: 0100 0000b, 40h bit allocation
ErrorFlag register bit descriptions
R/W
R
7
0
00
6
Value
-
1
0
KeyErr AccessErr
StandBy PowerDown Crypto1On TStopNow
R
6
Rev. 3.4 — 26 January 2010
D
Value
-
1
1
1
0
1
1
1
5
Description
reserved
set when the LoadKeyE2 or LoadKey command recognize that the
input data is not encoded based on the Key format definition
set when the LoadKeyE2 or the LoadKey command starts
056634
Section 10.5.1.1 “Page register” on page
R
5
Description
reserved
activates Standby mode. The current consuming blocks are
switched off but the clock keeps running
activates Power-down mode. The current consuming blocks
are switched off including the clock
Crypto1 unit is switched on and all data communication with
the card is encrypted. This bit can only be set to logic 1 by
successful execution of the Authent2 command
Crypto1 unit is switched off. All data communication with the
card is unencrypted (plain)
immediately stops the timer. Reading this bit always returns
logic 0
immediately starts the timer. Reading this bit will always
returns logic 0
immediately clears the internal FIFO buffer’s read and write
pointer, the FIFOLength[6:0] bits and FIFOOvfl flag are set to
logic 0. Reading this bit always returns logic 0
D
4
FIFOOvfl
R
4
D
3
CRCErr FramingErr
R
3
D
2
R
2
ISO/IEC 14443 reader IC
TStartNow FlushFIFO
MFRC531
© NXP B.V. 2010. All rights reserved.
D
ParityErr
1
48.
R
1
CollErr
53 of 116
D
0
R
0