ROMEO2 datasheet(8/28 Pages) MOTOROLA

8 / 28 page

MC33593

MOTOROLA SEMICONDUCTORS PRODUCTS

revision 7.0, 5 February 2002

DATA MANAGER

This block has five purposes:

- ID detection,

- Header recognition,

- Clock recovery,

- Output data and recovered clock on SPI port,

- End-of-Message detection.

Table 2 details some ROMEO2 features versus the bits DME and SOE values.

Table 2: ROMEO2 features versus DME and SOE

Table 3 details some ROMEO2 features versus DME values.

Table 3: ROMEO2 features versus DME

CLOCK GENERATOR

Typical crystal frequency is 13.5775MHz for 868MHz band.

Figure 11: Clock generation diagram

DME

SOE

Timer

ROMEO2

kept in Run mode by

Microcontroller

woken-up by

External control by

STROBE pin

Raw data

Internal and external

control by STROBE pin

External control by

STROBE pin

Message Detection

word

Internal and external

control by STROBE pin

ID detection

and STROBE pin

Data clock

DME

SPI status

Data format

Output

Disabled

Bitstream

No clock

MOSI

Master when

RESETB=1

Data bytes

Recovered clock

MOSI

SCLK

Phase Frequency Detector

XTAL

Reference

÷ 64

÷ 11

IF Filter Reference Clock

& Clock Recovery

UHF Oscillator

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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