PCD5013H/F1 데이터 시트보기 (PDF) - Philips Electronics

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PCD5013H/F1

FLEX™roaming decoder II

Philips Electronics 

Philips Semiconductors

FLEX™ roaming decoder II

Product specification

PCD5013

handbook, full pagewidth

reset

PCD5013 disables

SPI transmit

PCD5013 initializes

checksum register

to part ID value

PCD5013 initiates

part ID packet

PCD5013 waits for

SPI packet from host

Y

N

checksum packet?

Y

PCD5013

SPI transmit

enabled?

N

packet data

matches checksum

N

register data?

Y

PCD5013 enables

SPI transmit

PCD5013 disables

SPI transmit

PCD5013 sets

checksum registers to

the XOR of the packet

data bits with the

checksum register bits

MGR617

Fig.10 SPI security algorithm.

1999 Apr 12

16

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