mfrc531 NXP Semiconductors, mfrc531 Datasheet - Page 7

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

NXP Semiconductors
9. Functional description
MFRC531_34
Product data sheet
PUBLIC
9.1.1 Overview of supported microprocessor interfaces
9.1.2 Automatic microprocessor interface detection
9.1 Digital interface
The MFRC531 supports direct interfacing to various 8-bit microprocessors. Alternatively,
the MFRC531 can be connected to a PC’s Enhanced Parallel Port (EPP).
the parallel interface signals supported by the MFRC531.
Table 4.
After a Power-On or Hard reset, the MFRC531 resets parallel microprocessor interface
mode and detects the microprocessor interface type.
The MFRC531 identifies the microprocessor interface using the logic levels on the control
pins. This is performed using a combination of fixed pin connections and the dedicated
Initialization routine (see
Bus control signals
Separated read and
write strobes
Common read and write
strobe
Common read and write
strobe with handshake
(EPP)
Supported microprocessor and EPP interface signals
Rev. 3.4 — 26 January 2010
Bus
control
address
data
control
address
data
control
address
data
Section 9.7.4 on page
056634
Separated address
and data bus
NRD, NWR, NCS
A0, A1, A2
D0 to D7
R/NW, NDS, NCS
A0, A1, A2
D0 to D7
-
-
-
28).
Multiplexed address and data bus
NRD, NWR, NCS, ALE
AD0, AD1, AD2, AD3, AD4, AD5
AD0 to AD7
R/NW, NDS, NCS, AS
AD0, AD1, AD2, AD3, AD4, AD5
AD0 to AD7
nWrite, nDStrb, nAStrb, nWait
AD0, AD1, AD2, AD3, AD4, AD5
AD0 to AD7
ISO/IEC 14443 reader IC
MFRC531
© NXP B.V. 2010. All rights reserved.
Table 4
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