CLRC63201T datasheet(7/127 Pages) NXP

Part #	CLRC63201T

Description	Standard multi-protocol reader solution

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Manufacturer	NXP [NXP Semiconductors]

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CLRC632

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Product data sheet

COMPANY PUBLIC

Rev. 3.7 — 27 February 2014

073937

7 of 127

NXP Semiconductors

CLRC632

Standard multi-protocol reader solution

9.

Functional description

9.1 Digital interface

9.1.1 Overview of supported microprocessor interfaces

The CLRC632 supports direct interfacing to various 8-bit microprocessors. Alternatively,

the CLRC632 can be connected to a PC’s Enhanced Parallel Port (EPP). Table 4 shows

the parallel interface signals supported by the CLRC632.

9.1.2 Automatic microprocessor interface detection

After a Power-On or Hard reset, the CLRC632 resets parallel microprocessor interface

mode and detects the microprocessor interface type.

The CLRC632 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 Section 9.7.4 on page 30).

Table 4.

Supported microprocessor and EPP interface signals

Bus control signals

Bus

Separated address

and data bus

Multiplexed address and data bus

Separated read and

write strobes

control

NRD, NWR, NCS

NRD, NWR, NCS, ALE

address

A0, A1, A2

AD0, AD1, AD2, AD3, AD4, AD5

data

D0 to D7

AD0 to AD7

Common read and write

strobe

control

R/NW, NDS, NCS

R/NW, NDS, NCS, AS

address

A0, A1, A2

AD0, AD1, AD2, AD3, AD4, AD5

data

D0 to D7

AD0 to AD7

Common read and write

strobe with handshake

(EPP)

control

-

nWrite, nDStrb, nAStrb, nWait

address

-

AD0, AD1, AD2, AD3, AD4, AD5

data

-

AD0 to AD7

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