MFRC531 Просмотр технического описания (PDF) - Philips Electronics

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MFRC531

ISO 14443 Reader IC

Philips Electronics 

Philips Semiconductors

ISO 14443 Reader IC

Short From Specification Rev. 2.0 February 2002

MF RC531

3.2.5 RESET PIN

The reset pin disables internal current sources and clocks and detaches the MF RC531 virtually from the µC

bus. If RST is released, the MF RC531 executes the power up sequence.

3.2.6 OSCILLATOR

Name

XIN

XOUT

Type

I

O

Function

Oscillator Buffer Input

Oscillator Buffer Output

The very fast on-chip oscillator buffer operates with a 13.56 MHz crystal connected to XIN and XOUT. If the

device shall operate with an external clock it may be applied to pin XIN.

3.2.7 MIFARE® INTERFACE

The MF RC531 supports the active antenna concept of MIFARE®. It may handles the base-band signals

NPAUSE and KOMP of MIFARE® Core Modules (MF CMxxx) at the pins MFIN and MFOUT.

Name

MFIN

MFOUT

Type

I with Schmitt Trigger

O

Function

MIFARE® Interface Input

MIFARE® Interface Output

The MIFARE® interface may be used to communicate with either the analog or the digital part of the MF

RC531 separately in the following ways:

• The analog circuit may be used stand-alone via the MIFARE® interface. In that case MFIN will be

connected to the externally generated NPAUSE signal. The MFOUT pin provides the KOMP signal.

• The digital circuit may be used to drive an external analog circuit via the MIFARE® interface. In that case

the MFOUT pin provides the internally generated NPAUSE signal and MFIN will be connected to the

KOMP signal from the outside.

3.2.8 PARALLEL INTERFACE

16 pins control the parallel interface:

Name

D0 … D7

A0 … A2

NWR / RNW

NRD / NDS

NCS

ALE

IRQ

Type

I/O with Schmitt Trigger

I/O with Schmitt Trigger

I/O with Schmitt Trigger

I/O with Schmitt Trigger

I/O with Schmitt Trigger

I/O with Schmitt Trigger

O

7

Function

Bi-directional Data Bus

Address Lines

Not Write / Read Not Write

Not Read / Not Data Strobe

Not Chip Select

Address Latch Enable

Interrupt Request

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