LM3S8971 Luminary Micro, Inc, LM3S8971 Datasheet - Page 291

• Manufacturer Part Number: LM3S8971
• Description: Lm3s8971 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Reset
Reset
Type
Type
ADC Sample Sequence Control 0 (ADCSSCTL0)
Base 0x4003.8000
Offset 0x044
Type R/W, reset 0x0000.0000
July 26, 2008
Bit/Field
31
30
29
28
27
TS7
R/W
TS3
R/W
31
15
0
0
R/W
R/W
Register 12: ADC Sample Sequence Control 0 (ADCSSCTL0), offset 0x044
This register contains the configuration information for each sample for a sequence executed with
Sample Sequencer 0. When configuring a sample sequence, the END bit must be set at some point,
whether it be after the first sample, last sample, or any sample in between.
This register is 32-bits wide and contains information for eight possible samples.
IE7
IE3
30
14
0
0
END7
END3
R/W
R/W
29
13
0
0
Name
END7
TS7
TS6
IE7
D7
R/W
R/W
28
D7
12
D3
0
0
TS6
R/W
TS2
R/W
27
11
0
0
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
IE6
IE2
26
10
0
0
Reset
END6
END2
R/W
R/W
25
0
9
0
0
0
0
0
0
Preliminary
R/W
R/W
D6
D2
24
0
8
0
Description
8th Sample Temp Sensor Select
The TS7 bit is used during the eighth sample of the sample sequence
and specifies the input source of the sample. If set, the temperature
sensor is read. Otherwise, the input pin specified by the ADCSSMUX
register is read.
8th Sample Interrupt Enable
The IE7 bit is used during the eighth sample of the sample sequence
and specifies whether the raw interrupt signal (INR0 bit) is asserted at
the end of the sample's conversion. If the MASK0 bit in the ADCIM
register is set, the interrupt is promoted to a controller-level interrupt.
When this bit is set, the raw interrupt is asserted, otherwise it is not. It
is legal to have multiple samples within a sequence generate interrupts.
8th Sample is End of Sequence
The END7 bit indicates that this is the last sample of the sequence. It is
possible to end the sequence on any sample position. Samples defined
after the sample containing a set END are not requested for conversion
even though the fields may be non-zero. It is required that software write
the END bit somewhere within the sequence. (Sample Sequencer 3,
which only has a single sample in the sequence, is hardwired to have
the END0 bit set.)
Setting this bit indicates that this sample is the last in the sequence.
8th Sample Diff Input Select
The D7 bit indicates that the analog input is to be differentially sampled.
The corresponding ADCSSMUXx nibble must be set to the pair number
"i", where the paired inputs are "2i and 2i+1". The temperature sensor
does not have a differential option. When set, the analog inputs are
differentially sampled.
7th Sample Temp Sensor Select
Same definition as TS7 but used during the seventh sample.
R/W
R/W
TS5
TS1
23
0
7
0
R/W
R/W
IE5
IE1
22
0
6
0
END5
END1
R/W
R/W
21
0
5
0
R/W
R/W
D5
D1
20
0
4
0
LM3S8971 Microcontroller
R/W
R/W
TS4
TS0
19
0
3
0
R/W
R/W
IE4
IE0
18
0
2
0
END4
END0
R/W
R/W
17
0
1
0
R/W
R/W
D4
D0
16
0
0
0
291