LM3S5G31 Datasheet, PDF (622/1223 Pages) Texas Instruments – Stellaris LM3S5G31 Microcontroller

Analog-to-Digital Converter (ADC)
13.1
■ Power and ground for the analog circuitry is separate from the digital power and ground
■ Efficient transfers using Micro Direct Memory Access Controller (µDMA)
– Dedicated channel for each sample sequencer
– ADC module uses burst requests for DMA
Block Diagram
The Stellaris microcontroller contains two identical Analog-to-Digital Converter modules. These two
modules, ADC0 and ADC1, share the same 16 analog input channels. Each ADC module operates
independently and can therefore execute different sample sequences, sample any of the analog
input channels at any time, and generate different interrupts and triggers. Figure 13-1 on page 622
shows how the two modules are connected to analog inputs and the system bus.
Figure 13-1. Implementation of Two ADC Blocks
Triggers
Interrupts/
Triggers
Interrupts/
Triggers
ADC 0
ADC 1
Input
Channels
Figure 13-2 on page 623 provides details on the internal configuration of the ADC controls and data
registers.
622
July 03, 2014
Texas Instruments-Production Data