MC33591MOD434 Freescale Semiconductor, MC33591MOD434 Datasheet - Page 14

• Manufacturer Part Number: MC33591MOD434
• Description: BOARD EVALUATION FOR MC33591 RX
• Manufacturer: Freescale Semiconductor
• Type: Receiverr

Specifications of MC33591MOD434

• Contents: Module and Misc Hardware
• For Use With/related Products: MC33591 434 MHz RF Module
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

STATE MACHINES
STATE MACHINE WITH STROBE OSCILLATOR CONTROL
The circuit is in Sleep mode, except for the Strobe oscillator and the Strobe counter.
The circuit is waiting for a valid ID word. If ID or its complement is detected, the state machine advances to state
4. If not, it will go back into sleep mode (state 2) at the end of the Strobe period.
ID or its complement has been detected, Data Manager is waiting for Header or its complement. Time-out
counter is running. This counter will count up to 66 (± 1) times the strobe oscillator period (T
If Header has been received, data and clock signals are output on the SPI port until End of Message indicates the
data sequence end. If the complement of Header has been received, output data are complemented too.
At any time, a low level applied on RESETB during more than one Ts forces the state machine to state 1. When
14
Figure 15 details the state machine when the strobe oscillator is enabled (SOE=1).
State 2:
State 3:
State 4:
State 5:
For all states:
Time-out
Figure 15: State machine with strobe oscillator control
Reset and Start Strobe Counter
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Waiting for End of Message
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Reset and start Timer
Strobe Counter=SR
Output data & clock
Waiting for ID word
Waiting for Header
Header received
MC33591 Technical Data
OR STROBE=1
EOM received
Sleep mode
ID detected
AND HE=1
Run mode
Run mode
Run mode
State 2
State 3
State 4
State 5
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AND STROBE pin released
Strobe Counter ¹ SR
ID detected
AND HE=0
SPI master
Strobe
MOTOROLA
).