Texas Instruments TMS320DM36X manual ADC if Block Diagram

User's Guide

SPRUFI7–March 2009

Analog to Digital Converter (ADC) Interface

DM36x has a 6-channel, 10-bit analog-to-digital converter (ADC) interface. The CPU communicates to the ADC interface using 32-bit-wide control registers accessible via the internal peripheral bus.

1Features

The DM36x ADC interface has following features:

∙Supports six configurable analog Input

∙Supports for successive approximation type 10-bit, A-D converter

∙Programmable sampling / conversion time (base clock is AUXCLK)

∙Supports channel select by auto scan conversion

∙Supports mode select by one-shot mode or free-run mode

∙Programmable setup (Idle) period to secure A/D sampling start time

∙Supports the clock stop signals to connect the PSC

1.1Block Diagram

Figure 1 shows the data path and control path of ADC interface.

Figure 1. ADC IF Block Diagram

32-bit￿Peripheral￿bus

Interrupt￿to￿CPU

Comparator

CMPTGT

CMPUDATA

CMPLDATA

Interrupt controller

AD5DAT

AD4DAT

AD3DAT

AD2DAT

AD1DAT

AD0DAT

10-bit

Analog-to-digital

converter

ADC

Timing￿and￿channel

controller

ADCTL

SETDIV

CHSEL

EMUCTRL

6￿to￿1 Analog￿input

selector

ADC_CH0

ADC_CH1

ADC_CH2

ADC_CH3

ADC_CH4

ADC_CH5

SPRUFI7-001

8	Analog to Digital Converter (ADC) Interface	SPRUFI7–March 2009
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