Philips Semiconductors

Short Form Specification Rev. 2.0 January 2002

Highly Integrated ISO 14443A Reader IC

MF RC500

8

PUBLIC

3.3 Applications

3.3.1 CONNECTING DIFFERENT µCONTROLLER'S

The MF RC500 supports different parallel µC interfaces. An intelligent auto-detection logic automatically

adapts the parallel interface to the respective bus system. Selection of the device is performed with signal

NCS.

To connect µ-Controllers using separated address and data bus pin ALE has to be connected to DVDD.

To connect µ-Controllers using multiplexed address and data bus pin ALE has to be connected to the signal

ALE of the µ-Controller

To connect µ-Controllers using RNW and NDS (instead of NWR and NRD) the µ-Controller’s RNW has to be

connected to pin NWR and NDS to pin NRD.

3.3.2 APPLICATION EXAMPLE

MF RC500

SO 32

µController

DA0 ... DA7

NCS, NRD, NWR

TX1

TX2

ALE

IRQ

XOUT

XIN

VMID

RX

Figure 3-2: MF RC500; principle circuit for short distance