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Freescale Semiconductor, Inc.
MC33593
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
DME
0
1
SOE
0
1
0
1
Timer
External control by
STROBE pin
Internal and external
control by STROBE pin
External control by
STROBE pin
Internal and external
control by STROBE pin
ROMEO2
kept in Run mode by
STROBE pin
STROBE pin
ID detection
and STROBE pin
Microcontroller
woken-up by
Raw data
Message Detection
word
Data clock
Table 3 details some ROMEO2 features versus DME values.
Table 3: ROMEO2 features versus DME
DME
0
1
SPI status
Disabled
Master when
RESETB=1
Data format
Bitstream
No clock
Data bytes
Recovered clock
Output
MOSI
-
MOSI
SCLK
CLOCK GENERATOR
Typical crystal frequency is 13.5775MHz for 868MHz band.
Figure 11: Clock generation diagram
XTAL
Reference
Phase Frequency Detector
÷ 64
UHF Oscillator
÷ 11
IF Filter Reference Clock
& Clock Recovery
For More Information On This Product,
Go to: www.freescale.com
? Motorola, Inc., 2002.
MOTOROLA SEMICONDUCTORS PRODUCTS
8
revision 7.0, 5 February 2002
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