MC33696MOD315EV Freescale Semiconductor, MC33696MOD315EV Datasheet - Page 22

• 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

Receive Mode
For all states: At any time, a low level applied to STROBE puts the circuit into state 20, and a low level
applied to CONFB forces the state machine to state 1, configuration mode.
12.2.4.3 Timing Definition
As shown in
The goal for the receiver is to recognize at least one ID during Ton time. Many IDs are transmitted during
that time.
During Ton, the receiver should be able to detect an ID, but as receiver and transmitter are not
synchronized, an ID may already be transmitted when Ton time begins. That is the reason why Ton should
be sized to receive two IDs: to be sure to recognize one, no matter what the time difference between
beginning of transmission of the ID and beginning of run time for the receiver.
Ton should also include the setting time of the receiver. Setting time is composed of the crystal oscillator
wakeup time
time to settle).
Toff should be sized to allow the positioning of an on state during the transmission of the ID field.
During the setting time, no reception is possible.
12.3 Receiver On/Off Control
In receive mode, on/off sequencing can be controlled internally using the strobe oscillator, or managed
externally by the MCU through the input pin STROBE.
If the strobe oscillator is selected (SOE = 1):
1. Refer to parameter 5.10 found in
2. Refer to parameter 5.9 found in
3. Refer to preamble definition found in
22
Receiver
Receiver
Status
Status
Signal
Signal
•
•
RF
RF
received, output data are complemented also. When an EOM occurs before the current byte is fully
shifted out, dummy bits are inserted until the number of shifted bits is a multiple of 8.
Off time is clocked by the strobe oscillator
On time is clocked by the crystal oscillator, enabling accurate control of the on time, and therefore
of the current consumption of the whole system
Off
Off
1
Figure
, the PLL lock time
13, a settling time is required when entering the on state.
On
On
Ton
Ton
Section 21.5, “PLL & Crystal Oscillator.”
Section 21.5, “PLL & Crystal Oscillator.”
2
Figure
, and setup of all analog parameters
Figure 13. Receiver Usable Window
9.
MC33696 Data Sheet, Rev. 12
Toff
Toff
Off
Off
ID
ID
ID
ID
ID
ID
Setting
Setting
ID
ID
Time
Time
Detected
Detected
ID
ID
ID
ID
ID
ID
3
(AGC and demodulator need some
ID
ID
ID
ID
ID
ID
On
On
Header
Header
Freescale Semiconductor
Data
Data
EOM
EOM