MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor
19-105
collecting all these values, they will be added according to the RSD algorithm to create the 12-bit digital
representation of the original analog input. The bits are added in the following manner:
19.4.9.2.3
RSD Adder
The array, s1 to s12,will be the digital output of the RSD ADC with s1 being the msb and s12 being the
lsb (least significant bit).
Figure 19-63. RSD Adder
19.5
Initialization/Application Information
19.5.1
Multiple Queues Control Setup Example
This section provides an example of how to configure multiple user command queues.
describes how each queue can be used for a different application. Also documented in this section are
general guidelines on how to initialize the on-chip ADCs and the external device, and how to configure
the command queues and the eQADC.
Table 19-56. Example Applications of Each Command Queue
Command
Queue Number
Queue Type
Running Speed
Number of
Contiguous
Conversions
Example
0
Very fast burst
time-based queue
every 2
s for 200
s;
pause for 300
s and then
repeat
2
Injector current profiling
1
Fast
hardware-triggered
queue
every 900
s
3
Current sensing of PWM
controlled actuators
2
Fast repetitive
time-based queue
every 2 ms
8
Throttle position
3
Software-triggered
queue
every 3.9 ms
3
Command triggered by
software strategy
4
Repetitive
angle-based queue
every 625 us
7
Airflow read every 30
degrees at 8000 RPM
5
Slow repetitive
time-based queue
every 100 ms
10
Temperature sensors
b1
a13
Carry
b12
b11
a3
a2
a12
b2
• • •
• • •
• • •
• • •
b10
a11
s1
+
s2
• • •
• • •
s10
s11
s12
Summary of Contents for MPC5553
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