mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 70

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

NXP Semiconductors
MFRC531_34
Product data sheet
PUBLIC
10.5.6.6 IRQPinConfig register
10.5.6.7 PreSet2E register
10.5.6.8 PreSet2F register
10.5.7.1 Page register
10.5.7.2 Reserved registers 31h, 32h, 33h, 34h, 35h, 36h and 37h
10.5.7 Page 6: reserved
Configures the output stage for pin IRQ.
Table 116. IRQPinConfig register (address: 2Dh) reset value: 0000 0010b, 02h bit allocation
Table 117. IRQPinConfig register bit descriptions
Table 118. PreSet2E register (address: 2Eh) reset value: xxxx xxxxb, xxh bit allocation
Table 119. PreSet2F register (address: 2Fh) reset value: xxxx xxxxb, xxh bit allocation
Selects the page register; see
Table 120. Reserved registers (address: 31h, 32h, 33h, 34h, 35h, 36h, 37h)
Remark: These registers are reserved for future use.
Bit
Symbol
Access
Bit
7 to 2
1
0
Bit
Symbol
Access
Bit
Symbol
Access
Bit
Symbol
Access
Symbol
000000
IRQInv
IRQPushPull
reset value: xxxx xxxxb, xxh bit allocation
R/W
W
W
7
7
x
7
x
7
x
Rev. 3.4 — 26 January 2010
R/W
W
W
6
6
6
6
x
x
x
Value
-
1
0
1
0
056634
Section 10.5.1.1 “Page register” on page
Description
these values must not be changed
inverts the signal on pin IRQ with respect to bit IRq
the signal on pin IRQ is not inverted and is the same as bit IRq
pin IRQ functions as a standard CMOS output pad
pin IRQ functions as an open-drain output pad
R/W
W
W
5
5
x
5
x
5
x
000000
R/W
R/W
4
W
W
4
4
4
x
x
x
3
R/W
W
W
3
x
3
x
3
x
2
R/W
W
W
ISO/IEC 14443 reader IC
2
x
2
x
2
x
IRQInv
MFRC531
R/W
1
© NXP B.V. 2010. All rights reserved.
48.
R/W
W
W
1
x
1
x
1
x
IRQPushPull
R/W
70 of 116
0
R/W
W
W
0
x
0
x
0
x