mc33696fje/r2 Freescale Semiconductor, Inc, mc33696fje/r2 Datasheet - Page 17

• Manufacturer Part Number: mc33696fje/r2
• Description: Mc33696 Pll Tuned Uhf Transceiver
• Manufacturer: Freescale Semiconductor, Inc

11.3.4.2 BANKA = 0, BANKB = 1
If strobe pin is 1, configuration is defined by Bank B, BANKS = 0.
If strobe pin is 0, MC33696 configuration is OFF.
If a message is received during State B, current state remains State B up to end of message.
11.3.4.3 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, MC33696 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.
11.3.5 Strobe Oscillator Switch Control
The conditions to enter strobe oscillator switch control are:
By simply writing BANKA and BANKB, the active banks will be defined.
MCU can override strobe oscillator control by controlling strobe pin level. If MCU I/O port is in high
impedance, strobe oscillator will control the OFF/ON state of the MC33696. The various available
sequences are described in the following subsections.
Freescale Semiconductor
Strobe Pin
Banks Bit
Strobe Pin
State A
•
•
•
State B
BANKA
Strobe pin connected to an external capacitor to define timing (see
Control”)
Strobe pin can also be connected to the MCU I/O port
SOE bit = 1
X
0
1
BANKB
OFF
0
1
1
OFF
Bank A is active (TX or RX)
Bank B is active (TX or RX)
Bank A and Bank B are both active, configuration will toggle at each wakeup,
not allowed with MODE = 1
State B
MC33696 Data Sheet, Rev. 9
State B
OFF
Section 14, “Receiver On/Off
Register Access through SPI
OFF
State A
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