Datasheet

Register 27: ADC Test Mode Loopback (ADCTMLB), offset 0x100
This register provides loopback operation within the digital logic of the ADC, which can be useful in
debugging software without having to provide actual analog stimulus. This test mode is entered by
writing a value of 0x0000.0001 to this register. When data is read from the FIFO in loopback mode,
the read-only portion of this register is returned.
ADC Test Mode Loopback (ADCTMLB)
Base 0x4003.8000
Offset 0x100
Type R/W, reset 0x0000.0000
16171819202122232425262728293031
reserved
ROROROROROROROROROROROROROROROROType
0000000000000000Reset
0123456789101112131415
LBreserved
R/WROROROROROROROROROROROROROROROType
0000000000000000Reset
DescriptionResetTypeNameBit/Field
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
0x0000.000ROreserved31:1
Loopback Mode Enable
When set, forces a loopback within the digital block to provide information
on input and unique numbering. The ADCSSFIFOn registers do not
provide sample data, but instead provide the 10-bit loopback data as
shown below.
DescriptionNameBit/Field
Continuous Sample Counter
Continuous sample counter that is initialized to 0
and counts each sample as it processed. This
helps provide a unique value for the data received.
CNT9:6
Continuation Sample Indicator
When set, indicates that this is a continuation
sample. For example, if two sequencers were to
run back-to-back, this indicates that the controller
kept continuously sampling at full rate.
CONT5
Differential Sample Indicator
When set, indicates that this is a differential
sample.
DIFF4
Temp Sensor Sample Indicator
When set, indicates that this is a temperature
sensor sample.
TS3
Analog Input Indicator
Indicates which analog input is to be sampled.
MUX2:0
0R/WLB0
433June 18, 2012
Texas Instruments-Production Data
Stellaris
®
LM3S8962 Microcontroller
NRND: Not recommended for new designs.