PCD5013 datasheet(17/76 Pages) PHILIPS

17 / 76 page

1999 Apr 12

Philips Semiconductors

Product speciﬁcation

FLEX

™ roaming decoder II

PCD5013

8.4.3

CONFIGURATION SEQUENCE

A typical configuration and synchronisation sequence

would be as follows, see Fig.11 for event timings:

1. The PCD5013 is reset by the host.

2. After 76800 clock cycles the PCD5013 interrupts the

host to read the part ID by pulling the READY

line LOW.

3. The host pulls SS LOW at the start of each

SPI transfer and clocks out the part ID data.

4. The host configures the following aspects of PCD5013

operation:

a) General configuration (Section 8.4.4)

b) Receiver operation (Section 8.5)

c) FLEX

™ CAPCODE configuration (Section 8.6).

The PCD5013 writes a part ID packet in response to

each incoming packet.

5. At the end of each packet the PCD5013 pulls the

READY line HIGH, and then LOW again to indicate

that packet processing is complete.

6. The host writes a control packet to enable FLEX

™

decoding in the PCD5013 (Section 8.4.7).

7. The host writes a checksum packet to enable SPI data

output by the PCD5013 (Section 8.4.2).

8. On recognising a SYNC word, the PCD5013

synchronises to the channel.

9. The PCD5013 initiates an SPI transfer writing the

status packet, indicating that it is now in synchronous

mode.

Fig.11 Typical configuration and synchronization sequence.

handbook, full pagewidth

MBK097

SPI

DECODER-TO-HOST

RESET

READY

FLEX DATASTREAM

SPI

HOST-TO-DECODER

checksum packet (7)

control packet (6)

partid packet (4)

configuration packets

(addresses, receiver etc.)

status packet (9)

partid packet (4)

(1)

(2)

(3)

(5)

(8)

SYNC

Numbers within parenthesis refer to sequence numbers, see Section 8.4.3.

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