AX58200 datasheet(94/180 Pages) ASIX

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AX58200

EtherCAT Slave Controller SoC

Enhanced 12-bit Analog-to-Digital Converter (EADC)

2.38.1 Overview

The chip contains one 12-bit successive approximation analog-to-digital converter (SAR ADC converter) with

16 external input channels and 3 internal channels. The ADC converter can be started by software trigger,

PWM0/1 triggers, BPWM0/1 triggers, timer0~3 overflow pulse triggers, ADINT0, ADINT1 interrupt EOC (End

of conversion) pulse trigger and external pin (EADC0_ST) input signal.

2.38.2 Features

⚫

Analog input voltage range: 0~ VREF (Max to 3.6V)

⚫

Reference voltage from VREF pin

⚫

12-bit resolution and 10-bit accuracy is guaranteed

⚫

Up to 16 single-end analog external input channels or 8 pair differential analog input channels

⚫

Up to 3 internal channels, they are band-gap voltage (VBG), temperature sensor (VTEMP), and VDD

power

⚫

Four ADC interrupts (ADINT0~3) with individual interrupt vector addresses

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Maximum ADC clock frequency is 72 MHz

⚫

Up to 5.14 MSPS conversion rate

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Configurable ADC internal sampling time

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12-bit, 10-bit, 8-bit, 6-bit configurable resolution

⚫

Supports calibration and load calibration words capability

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Supports internal reference voltage VREF: 1.6V, 2.0V, 2.5V, and 3.0V.

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Supports three power saving modes:

–

Deep Power-down mode

–

Power-down mode

–

Standby mode

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Up to 19 sample modules

–

Each of sample modules which is configurable for ADC converter channel EADC_CH0~15

and trigger source

–

Sample module 16~18 is fixed for ADC channel 16, 17, 18 input sources as band-gap voltage,

temperature sensor, and VDD power

–

Double buffer for sample control logic module 0~3

–

Configurable sampling time for each sample module

–

Conversion results are held in 19 data registers with valid and overrun indicators

⚫

An ADC conversion can be started by:

–

Write 1 to SWTRGn (EADC_SWTRG[n], n = 0~18)

–

External pin EADC_ST

–

Timer0~3 overflow pulse triggers

–

ADINT0 and ADINT1 interrupt EOC (End of conversion) pulse triggers

–

EPWM/BPWM triggers

⚫

Supports PDMA transfer

⚫

Conversion Result Monitor by Compare Mode

AX58200 Datasheet(PDF) 94 Page - ASIX Electronics Corporation

AX58200 Datasheet(HTML) 94 Page - ASIX Electronics Corporation

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