MC33594FTAE Freescale Semiconductor, MC33594FTAE Datasheet - Page 14

• Manufacturer Part Number: MC33594FTAE
• Description: RF Receiver UHF RECEIVER
• Manufacturer: Freescale Semiconductor
• Type: Receiverr

Specifications of MC33594FTAE

• Package / Case: LQFP-24
• Operating Frequency: 434 MHz
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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
the transition condition from one state to the next one is fulfilled, the transition time is one Ts (except for reaching
state 2). The transition time to state 2 is 2
coming from state 5).
© Motorola, Inc., 2002.
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
Freescale Semiconductor, Inc.
Reset and Start Strobe Counter
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
OR STROBE=1
EOM received
×
Sleep mode
ID detected
AND HE=1
Run mode
Run mode
Run mode
Ts (+ duration of the dummy byte if it is shifted out, only for transition
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State 2
State 3
State 4
State 5
MC33594
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AND STROBE pin released
Strobe Counter ≠ SR
ID detected
AND HE=0
SPI master
revision 1.1, 5 February 2002
Strobe
).