ADC12 Introduction

Figure 17−1. ADC12 Block Diagram

 

 

 

 

 

 

 

 

 

 

REF2_5V

REFON

 

 

 

 

 

 

 

 

 

 

INCHx=0Ah

 

VeREF+

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VREF+

 

 

 

 

 

 

 

 

 

on

 

 

 

 

 

 

 

 

 

 

1.5 V or 2.5 V

AVCC

 

VREF− /

VeREF−

 

 

 

 

 

 

 

 

Reference

 

 

 

 

 

 

 

AVCC

 

 

Ref_x

 

 

 

INCHx

 

 

11

10

01

00

SREF1

 

 

 

 

 

 

 

SREF0

 

ADC12OSC

 

 

4

 

 

AVSS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A0

0000

SREF2

1

0

ADC12ON

 

 

ADC12SSELx

 

A1

0001

 

 

 

 

 

 

ADC12DIVx

 

 

A2

0010

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A3

0011

Sample

VR−

VR+

 

 

 

00

 

 

A4

0100

 

 

 

 

 

and

 

 

 

 

 

Divider

01

ACLK

 

A5

0101

 

12−bit SAR

 

 

 

A6

0110

Hold

 

 

 

 

/1 .. /8

10

MCLK

 

 

 

 

 

 

 

 

 

A7

0111

S/H

Convert

 

 

 

 

 

11

SMCLK

 

 

1000

 

 

 

 

 

 

 

1001

 

 

 

 

 

 

ADC12CLK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1010

 

 

 

 

BUSY

 

 

 

 

 

 

1011

 

 

 

 

 

 

 

SHSx

 

 

1100

 

 

 

SHT0x

 

 

ISSH

 

 

 

1101

 

SHP

 

 

 

 

 

 

 

 

 

 

 

ENC

 

 

1110

 

 

 

 

4

 

 

 

 

 

 

1111

 

 

 

 

 

 

 

 

00

ADC12SC

 

 

 

 

Sample Timer

SHI

0

 

 

 

 

 

1

 

01

TA1

 

 

 

 

 

 

 

 

 

 

 

/4 .. /1024

 

 

 

 

 

 

 

0

 

 

1

 

Sync

TB0

 

AVCC

SAMPCON

 

 

4

 

 

 

 

10

 

 

 

 

 

 

 

 

11

TB1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SHT1x

MSC

 

 

 

 

INCHx=0Bh

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ref_x

ADC12MEM0

ADC12MCTL0

R

R

CSTARTADDx

CONSEQx

−

16 x 12 Memory Buffer

−

ADC12MEM15

−

16 x 8

Memory

Control

−

ADC12MCTL15

AVSS

ADC12 17-3

Page 360 Page 362
Page 361
Image 361
Texas Instruments MSP430x1xx manual 1. ADC12 Block Diagram
Page 360 Page 362

MSP430x1xx specifications

The Texas Instruments MSP430x1xx series is a family of ultra-low-power microcontrollers that are highly regarded in the embedded systems community for their versatility and performance. Designed for applications ranging from portable instrumentation to low-power industrial devices, the MSP430x1xx combines flexibility and efficiency with advanced features tailored for energy-sensitive applications.

One of the standout characteristics of the MSP430x1xx is its ultra-low-power operation. This series offers several low-power modes that can significantly extend battery life in portable devices. The microcontroller can be in active mode, low-power mode, or even in a deep sleep state, allowing developers to optimize power consumption based on the application's requirements. In fact, some configurations can operate at just a few microamps, making it ideal for battery-operated devices.

Another key feature is the 16-bit RISC architecture that provides powerful processing capabilities while maintaining a low power profile. The MSP430x1xx series supports a maximum clock speed of 16 MHz, allowing for efficient task execution while consuming minimal energy. This architecture ensures that programs run smoothly while the microcontroller remains energy efficient.

The MSP430x1xx is equipped with various integrated peripherals, including analog-to-digital converters (ADCs), timers, and communication interfaces like UART, SPI, and I2C. The inclusion of a powerful ADC enables the microcontroller to handle sensor readings with high accuracy, making it suitable for applications like environmental monitoring and medical devices. The integrated timers provide essential functionality for real-time applications, allowing for event-driven programming and precise timing control.

Memory options in the MSP430x1xx series are also robust, with configurations offering flash memory sizes from 1 KB to 64 KB. This flexibility allows developers to choose the optimal memory size for their specific applications, accommodating a wide range of requirements.

Additionally, the MSP430x1xx microcontrollers are designed with a wide operating voltage range, typically from 1.8V to 3.6V, making them compatible with various power sources and further enhancing their usability in diverse applications.

In summary, the Texas Instruments MSP430x1xx series of microcontrollers is an excellent choice for developers seeking low-power, high-performance solutions for embedded applications. With an efficient architecture, a rich set of peripherals, and flexible memory options, these microcontrollers are positioned to meet the growing demands of modern electronic designs, particularly in battery-powered and energy-sensitive applications.
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