TM4C129CNCZAD Datasheet, PDF (1163/1772 Pages) Texas Instruments – Tiva Microcontroller

Tiva^™ TM4C129CNCZAD Microcontroller
18.1
■ Converter uses two external reference signals (VREFA+ and VREFA-) or VDDA and GNDA as the
voltage reference
■ 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
■ Global Alternate Clock (ALTCLK) resource or System Clock (SYSCLK) can be used to generate
ADC clock
Block Diagram
The TM4C129CNCZAD microcontroller contains two identical Analog-to-Digital Converter modules.
These two modules, ADC0 and ADC1, share the same 24 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
18-1 on page 1163 shows how the two modules are connected to analog inputs and the system bus.
Figure 18-1. Implementation of Two ADC Blocks
Triggers
Interrupts/
Triggers
Interrupts/
Triggers
ADC 0
ADC 1
Input
Channels
Figure 18-2 on page 1164 provides details on the internal configuration of the ADC controls and data
registers.
June 18, 2014
Texas Instruments-Production Data
1163