MC33592FTA Datasheet, PDF (13/28 Pages) Motorola, Inc – PLL Tuned UHF Receiver for Data Transfer Applications

Freescale Semiconductor, Inc.
STATE MACHINES
STATE MACHINE WITH STROBE OSCILLATOR CONTROL
Figure 15 details the state machine when the strobe oscillator is enabled (SOE=1).
Figure 15 : State machine with strobe oscillator control
State 2
Sleep mode
Reset and Start Strobe Counter
SPI master
Strobe Counter=SR
Strobe Counter ¹ SR
OR STROBE=1 AND STROBE pin released
State 3
Run mode
Waiting for ID word
ID detected
AND HE=1
ID detected
AND HE=0
Time-out
State 4
Run mode
Reset and start Timer
Waiting for Header
Header received
State 5
Run mode
Output data & clock
Waiting for End of Message
EOM received
State 2:
The circuit is in Sleep mode, except for the Strobe oscillator and the Strobe counter.
State 3:
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.
State 4:
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_Strobe).
State 5:
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.
MOTOROLA
MC33592 Technical Data
13
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