High Priority Example - Texas Instruments Concerto F28M35 Series Technical Reference Manual

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High priority mode is assigned first to SOC0, then in increasing numerical order. The value written in the
SOCPRIORITY field defines the first SOC that is not high priority. In other words, if a value of 4 is written
into SOCPRIORITY, then SOC0, SOC1, SOC2, and SOC3 are defined as high priority, with SOC0 the
highest.
An example using high priority SOC's is given in
Example when SOCPRIORITY = 4
A After reset, SOC4 is 1
SOC7 receives trigger ;
SOC7 configured channel is converted immediately .
B RRPOINTER changes to point to SOC 7;
st
SOC8 is now 1 on round robin wheel .
C SOC2 & SOC12 triggers rcvd . simultaneously ;
SOC2 interrupts round robin wheel and SOC 2 configured
channel is converted while SOC 12 stays pending .
D RRPOINTER stays pointing to 7;
SOC12 configured channel is now converted .
E RRPOINTER changes to point to SOC 12;
st
SOC13 is now 1
B
High Priority
SOC
SOC
0
14
SOC
1
SOC
13
SOC
2
SOC
SOC
12
3
D
High Priority
SOC
SOC
0
14
SOC
1
SOC
13
SOC
2
SOC
SOC
12
3
SPRUH22I – April 2012 – Revised November 2019
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Figure 10-15. High Priority Example
st
on round robin wheel ;
on round robin wheel .
SOC
4
SOC
SOC
5
15
SOC
6
RRPOINTER
(value = 7)
SOC
8
SOC SOC
11 9
SOC
10
SOC
4
SOC
SOC
15 5
SOC
6
RRPOINTER
(value = 7)
SOC
8
SOC SOC
11 9
SOC
10
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Figure 10-15 .
A
High Priority
SOC
SOC
0
14
SOC
1
SOC
13
SOC
2
SOC
SOC
12
3
C
High Priority
SOC
SOC
0
14
SOC
1
SOC SOC
7
13
SOC
2
SOC
SOC
12
3
E
High Priority
SOC
SOC
0
14
SOC
1
SOC
SOC
7
13
SOC
2
SOC
SOC
12
3
Analog-to-Digital Converter (ADC)
SOC
4
SOC
SOC
5
15
SOC
6
RRPOINTER SOC
(default = 32)
SOC
8
SOC SOC
11 9
SOC
10
SOC
4
SOC
SOC
5
15
SOC
6
RRPOINTER SOC
(value = 7)
SOC
8
SOC SOC
11 9
SOC
10
SOC
4
SOC
SOC
15 5
SOC
6
RRPOINTER SOC
(value = 12)
SOC
8
SOC SOC
11 9
SOC
10
Analog Subsystem
7
7
7
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