mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 48

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

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
10.5.1.1 Page register
10.5.1.2 Command register
10.5.1 Page 0: Command and status
10.5 Register descriptions
Selects the page register.
Table 39.
Table 40.
Starts and stops the command execution.
Table 41.
Table 42.
Bit
Symbol
Access
Bit
7
6 to 3
2 to 0
Bit
Symbol
Access
Bit
7
6
5 to 0
Symbol
IFDetectBusy
0
Command[5:0]
Symbol
UsePageSelect 1
0000
PageSelect[2:0] -
Page register (address: 00h, 08h, 10h, 18h, 20h, 28h, 30h, 38h)
reset value: 1000 0000b, 80h bit allocation
Page register bit descriptions
Command register (address: 01h) reset value: x000 0000b, x0h bit allocation
Command register bit descriptions
UsePageSelect
IFDetectBusy
R/W
Rev. 3.4 — 26 January 2010
7
R
7
Value
-
0
1
-
-
Value
0
-
056634
Description
shows the status of interface detection logic
interface detection finished successfully
interface detection ongoing
reserved
Reading this register shows which command is being
executed.
activates a command based on the Command code.
Description
the value of PageSelect[2:0] is used as the register address
A5, A4, and A3. The LSBs of the register address are
defined using the address pins or the internal address latch,
respectively.
the complete content of the internal address latch defines
the register address. The address pins are used as
described in
reserved
when UsePageSelect = logic 1, the value of PageSelect is
used to specify the register page (A5, A4 and A3 of the
register address)
R
6
0
6
5
5
0000
Table 5 on page
R/W
4
4
Command[5:0]
3
3
8.
D
ISO/IEC 14443 reader IC
R/W
2
2
MFRC531
PageSelect[2:0]
© NXP B.V. 2010. All rights reserved.
R/W
1
1
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R/W
0
0