MC33696MOD315EV Freescale Semiconductor, MC33696MOD315EV Datasheet - Page 34

• Manufacturer Part Number: MC33696MOD315EV
• Description: MCU, MPU & DSP Development Tools MC33696 (ECHO) RF C EVAL
• Manufacturer: Freescale Semiconductor

Specifications of MC33696MOD315EV

• Processor To Be Evaluated: MC9S08RG60
• Interface Type: RS-232
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Configuration Switching
17.1.2.2 BANKA = 0, BANKB = 1
If strobe pin is 1, configuration is defined by Bank B, BANKS = 0.
If strobe pin is 0, MC33696 configuration is OFF.
If a message is received during State B, current state remains State B up to end of message.
17.1.2.3 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, 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.
17.1.3 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.
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 MC33696. The various
available sequences are described in the following subsections.
34
Strobe Pin
Banks Bit
Strobe Pin
State A
•
•
•
State B
BANKA
Strobe pin connected to an external capacitor to define timing (see
On/Off
Strobe pin can also be connected to the MCU I/O port
SOE bit = 1
X
0
1
BANKB
OFF
Control”)
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. 12
State B
OFF
Section 12.3, “Receiver
OFF
State A
Freescale Semiconductor