MC33696MOD434EV Freescale Semiconductor, MC33696MOD434EV Datasheet - Page 38

• Manufacturer Part Number: MC33696MOD434EV
• Description: MCU, MPU & DSP Development Tools MC33696 (ECHO) RF C EVAL
• Manufacturer: Freescale Semiconductor

Specifications of MC33696MOD434EV

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

Controller
18.2 Transmit Mode
In transmit mode, the state diagram is reduced to only one state: state 30. The circuit is either waiting for
a digital telegram to send, or is sending one. In this mode, the circuit can be considered as a simple RF
physical interface. The information presented on MOSI is sent directly in RF (according to the selected
modulation), with no internal processing.
Data transmission is possible only if the PLL is within the lock-in range. Therefore, during transmission,
if the PLL switches out of lock-in range, the RF output stage is switched off internally, thereby preventing
data from being transmitted in an unwanted band.
18.3 Receive Mode
The receiver is either waiting for an RF telegram, or is receiving one. Four different processes are possible,
as determined by the values of the DME and SOE bits. The transmitter part is maintained off. A state
diagram describes the sequence of operations in each case.
18.3.1 Data Manager Disabled and Strobe Oscillator Enabled
Raw received data are sent directly on the MOSI line.
38
STROBE
CONFB
SEB
Figure 31. Second Valid Sequence from Standby/LVD Mode to Configuration Mode
If the STROBE pin is tied to a high level before switching to receive mode,
the receiver does not go through an off or standby state.
STROBE = 1
SPI Startup Time
Figure 32. Receive Mode, DME = 0, SOIE = 1
MC33696 Data Sheet, Rev. 9
STROBE = 0
Off Counter = ROFF[2:0]
Raw Data on MOSI
or STROBE = 1
10 μs (Maximum)
State 0b
State 0
NOTE
Off
On
Figure 32
shows the state diagram.
STROBE = 0
On Counter = RON[3:0]
and STROBE ≠ 1
SPI Deselected
Freescale Semiconductor