Intel MAX 10 JTAG Manuale utente

Intel® MAX® 10 JTAG Boundary-Scan

Testing User Guide

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UG-M10JTAG | 2019.05.10

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Contents

1. Intel® MAX® 10 JTAG BST Overview................................................................................3

2. JTAG BST Architecture.................................................................................................... 4

2.1. JTAG Pins............................................................................................................. 4

2.2. JTAG Circuitry Functional Model............................................................................... 4

2.3. JTAG Boundary-Scan Register..................................................................................5

2.3.1. Boundary-Scan Cells in Intel MAX 10 I/O Pin................................................. 5

3. BST Operation Control.................................................................................................... 7

3.1. JTAG IDCODE .......................................................................................................7

3.2. JTAG Secure Mode................................................................................................. 8

3.3. JTAG Private Instruction......................................................................................... 8

3.4. JTAG Instructions.................................................................................................. 9

4. I/O Voltage Support in the JTAG Chain......................................................................... 10

5. Enabling and Disabling JTAG BST Circuitry....................................................................11

6. Guidelines for JTAG BST................................................................................................ 12

7. Boundary-Scan Description Language Support............................................................. 13

A. Document Revision History for the Intel MAX 10 JTAG Boundary-Scan Testing

User Guide............................................................................................................... 14

Contents

Intel® MAX® 10 JTAG Boundary-Scan Testing User Guide Send Feedback

1. Intel® MAX® 10 JTAG BST Overview

Intel® MAX® 10 devices support the IEEE Std.1149.1 (JTAG) boundary-scan testing

(BST).

When you perform BST, you can test pin connections without using physical test

probes and capture functional data during normal operation. The boundary-scan cells

(BSCs) in a device can force signals onto pins, or capture data from pins or core logic

signals. Forced test data is serially shifted in from the TDI pin to the BSCs. Captured

data is serially shifted out to the TDO pin for external comparison with expected

results.

Note: You can perform BST on Intel MAX 10 devices before, after, and during configuration.

Related Information

•Intel MAX 10 FPGA Configuration User Guide

Provides more information about JTAG in-system programming.

•IEEE 1149.1 JTAG Boundary-Scan Testing in Altera Devices

Provides more information on IEEE 1149.1 JTAG boundary-scan testing.

•JTAG BST Architecture on page 4

•JTAG Boundary-Scan Register on page 5

•BST Operation Control on page 7

•I/O Voltage Support in the JTAG Chain on page 10

•Enabling and Disabling JTAG BST Circuitry on page 11

•Guidelines for JTAG BST on page 12

•Boundary-Scan Description Language Support on page 13

UG-M10JTAG | 2019.05.10

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2. JTAG BST Architecture

Intel MAX 10 JTAG interface uses four pins, TDI, TDO, TMS, and TCK.

2.1. JTAG Pins

Table 1. JTAG Pin Descriptions

Pin Function Description

TDI Serial input pin for:

• Instructions

• Test data

• Programming data

•TDI is sampled on the rising edge of TCK

•TDI pins have internal weak pull-up resistors.

TDO Serial output pin for:

• Instructions

• Test data

• Programming data

•TDO is sampled on the falling edge of TCK

• The pin is tri-stated if data is not being shifted out of the

device.

TMS Input pin that provides the control signal to

determine the transitions of the TAP

controller state machine.

•TMS is sampled on the rising edge of TCK

•TMS pins have internal weak pull-up resistors.

TCK The clock input to the BST circuitry. —

All the JTAG pins are powered by the VCCIO of I/O bank 1B. In JTAG mode, the I/O pins

support the LVTTL/LVCMOS 3.3-1.5V standards.

2.2. JTAG Circuitry Functional Model

The JTAG BST circuitry requires the following registers:

• Instruction register—determines which action to perform and which data register

to access.

• Bypass register (1-bit long data register)—provides a minimum-length serial path

between the TDI and TDO pins.

• Boundary-scan register—shift register composed of all the BSCs of the device.