Intel® FPGA Voltage Sensor IP Core User Guide

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ID 683781
Date 2/09/2018
Public
Document Table of Contents
Document Table of Contents x
1. Intel® FPGA Voltage Sensor IP Core Overview 2. Intel® FPGA Voltage Sensor IP Core Getting Started 3. Intel® FPGA Voltage Sensor IP Core Functional Description 4. Intel® FPGA Voltage Sensor IP Core Interface Signals 5. Intel® FPGA Voltage Sensor IP Core Registers 6. Intel® FPGA Voltage Sensor IP Core Implementation Guide 7. Document Revision History for Intel® FPGA Voltage Sensor IP Core User Guide
2. Intel® FPGA Voltage Sensor IP Core Getting Started x
2.1. Specifying Parameters and Options 2.2. Intel® FPGA Voltage Sensor Parameters
3. Intel® FPGA Voltage Sensor IP Core Functional Description x
3.1. Voltage Sensor Controller Core 3.2. Sample Storage Core 3.3. Configuring the Voltage Sensor Controller
3.1. Voltage Sensor Controller Core x
3.1.1. Conversion Modes
3.1.1. Conversion Modes x
3.1.1.1. One Round Conversion 3.1.1.2. Continuous Conversion
3.3. Configuring the Voltage Sensor Controller x
3.3.1. Configuring the Voltage Sensor Controller with Avalon-MM Sample Storage 3.3.2. Configuring the Voltage Sensor Controller with External Sample Storage
4. Intel® FPGA Voltage Sensor IP Core Interface Signals x
4.1. CSR Interface 4.2. Response Interface 4.3. Interrupt Interface
5. Intel® FPGA Voltage Sensor IP Core Registers x
5.1. Voltage Controller Core Registers 5.2. Sample Store Core Registers
6. Intel® FPGA Voltage Sensor IP Core Implementation Guide x
6.1. Using Voltage Sensor in Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices
6.1. Using Voltage Sensor in Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices x
6.1.1. Accessing the Voltage Sensor Using FPGA Core Access 6.1.2. Voltage Sensor Transfer Function
6.1.1. Accessing the Voltage Sensor Using FPGA Core Access x
6.1.1.1. Configuration Registers for the Core Access Mode
6.1.1.1. Configuration Registers for the Core Access Mode x
6.1.1.1.1. Accessing the Voltage Sensor in the Core Access Mode when MD[1:0] is not Equal to 2'b11 6.1.1.1.2. Accessing the Voltage Sensor in the Core Access Mode when MD[1:0] is Equal to 2'b11
1. Intel® FPGA Voltage Sensor IP Core Overview
2. Intel® FPGA Voltage Sensor IP Core Getting Started
3. Intel® FPGA Voltage Sensor IP Core Functional Description
4. Intel® FPGA Voltage Sensor IP Core Interface Signals
5. Intel® FPGA Voltage Sensor IP Core Registers
6. Intel® FPGA Voltage Sensor IP Core Implementation Guide
7. Document Revision History for Intel® FPGA Voltage Sensor IP Core User Guide

6.1. Using Voltage Sensor in Intel® Arria® 10 and Intel® Cyclone® 10 GX Devices

You can use the voltage sensor feature to monitor critical on-chip power supplies and external analog voltages. The voltage sensor block for the Intel® Arria® 10 and Intel® Cyclone® 10 GX devices supports access from the FPGA core. The following sections describe the flow in using the voltage sensor for the Intel® Arria® 10 and Intel® Cyclone® 10 GX devices.

Figure 6. Voltage Sensor Components

The conversion speed of the ADC is 500 ksps cumulative. When multiple channels are used, the speed per channel is reduced accordingly.

Note: VREFP_ADC pins consume very little current, leakage current accounts for most of the current drawn, which is less than 10 µA. For VREFN_ADC pins, the current is less than 0.1 mA.

For better ADC performance, connect VREFP_ADC and VREFN_ADC pins to an external 1.25 V accurate reference source (±0.2%). An on-chip reference source (±10%) is activated by connecting the VREFP_ADC pin to GND. Treating VREFN_ADC as an analog signal together with the VREFP_ADC signal provides a differential 1.25 V voltage.

Connect both VREFP_ADC and VREFN_ADC pins to GND if no external reference is supplied.

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