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MC33596 Datasheet(PDF) 32 Page - Freescale Semiconductor, Inc

Part No. MC33596
Description  PLL Tuned UHF Receiver for Data Transfer Applications
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Maker  FREESCALE [Freescale Semiconductor, Inc]
Homepage  http://www.freescale.com
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MC33596 Datasheet(HTML) 32 Page - Freescale Semiconductor, Inc

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MC33596 Data Sheet, Rev. 4
Configuration Switching
Freescale Semiconductor
32
15.1.2.2 BANKA = 0, BANKB = 1
If strobe pin is 1, configuration is defined by Bank B, BANKS = 0.
If strobe pin is 0, MC33596 configuration is OFF.
If a message is received during State B, current state remains State B up to end of message.
15.1.2.3 BANKA = 1, BANK B = 1
If strobe pin is 1, configuration is defined by BANKS. BANKS is toggled at each falling edge of the strobe
pin.
If strobe pin is 0, MC33596 configuration is OFF.
If a message is received during state A or state B, current state remains the same up to end of message.
If a read or write access is done using SPI, the next sequence will begin with state A whatever was the
active state before SPI access by MCU.
15.1.3 Strobe Oscillator Switch Control
The conditions to enter strobe oscillator switch control are:
Strobe pin connected to an external capacitor to define timing (see Section 11.3, “Receiver
On/Off Control”)
Strobe pin can also be connected to the MCU I/O port
SOE bit = 1
By simply writing BANKA and BANKB, the active banks will be defined.
The MCU can override strobe oscillator control by controlling the strobe pin level. If MCU I/O port is in
high impedance, the strobe oscillator will control the OFF/ON state of the MC33596. The various
available sequences are described in the following subsections.
BANKA
BANKB
X
0
Bank A is active
0
1
Bank B is active
1
1
Bank A and Bank B are both active, configuration will toggle at each wakeup
OFF
Strobe Pin
State B
OFF
State B
Strobe Pin
Banks Bit
State A
OFF
State B
OFF
State A


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