AN 100: In-System Programmability Guidelines

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ID 683546
Date 9/22/2014
Public
Document Table of Contents
Document Table of Contents x
1. In-System Programmability Guidelines
1. In-System Programmability Guidelines x
1.1. General ISP Guideline 1.2. IEEE Std. 1149.1 Signals 1.3. Sequential versus Concurrent Programming 1.4. ISP Troubleshooting Guidelines 1.5. ISP through Embedded Processors 1.6. ISP through In-Circuit Testers 1.7. Document Revision History
1.1. General ISP Guideline x
1.1.1. Operating Conditions 1.1.2. User Flash Memory Operations During In-System Programming 1.1.3. Interrupting In-System Programming 1.1.4. MultiVolt Devices and Power-Up Sequences 1.1.5. I/O Pins Tri-Stated During In-System Programming 1.1.6. Pull-Up and Pull-Down of JTAG Pins During In-System Programming
1.1.1. Operating Conditions x
1.1.1.1. ISP Voltage 1.1.1.2. Input Voltages
1.2. IEEE Std. 1149.1 Signals x
1.2.1. TCK Signal 1.2.2. Programming Through a Download Cable 1.2.3. Disabling IEEE Std. 1149.1 Circuitry 1.2.4. Working with Different Voltage Levels
1.3. Sequential versus Concurrent Programming x
1.3.1. Sequential Programming 1.3.2. Concurrent Programming 1.3.3. Selecting Sequential or Concurrent Programming 1.3.4. Devices in Different Modes
1.4. ISP Troubleshooting Guidelines x
1.4.1. Invalid ID and Unrecognized Device Messages 1.4.2. Verify the JTAG Chain Continuity 1.4.3. Check the Voltage Levels of the Board During In-System Programming 1.4.4. Random Signals on JTAG Pins 1.4.5. Software Issues
1.5. ISP through Embedded Processors x
1.5.1. Processor and Memory Requirements 1.5.2. Porting the Jam Player
1. In-System Programmability Guidelines

1.1.1.2. Input Voltages

Every Altera device family has a range for safe device operation. You need to ensure that all pins that transition during in-system programming do not have a ground or VCC overshoot. Overshoot problems typically occur on free-running clocks or data buses that can toggle during in-system programming. Pins that have an overshoot greater than 1.0 V must have series termination.

Each Device Family Datasheet lists the device input voltage specification in the “Absolute Maximum Ratings” and the “Recommended Operating Conditions” tables. The input voltages in the “Absolute Maximum Rating” table refers to the maximum voltage that the device can tolerate before risking permanent damage.

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