MAX II Development Kit Getting Started User Guide

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Demo Designs on a custom piece of hardware. This knowledge allows you to verify that the MAX II device will be powered up and configured quickly enough to perform whatever power up functions are required in the user system. w This test is meant to verify the data provided in the MAX II Device Data Sheet, not to replace it. All MAX II devices will have some fluctuation in power-up timing. Designers should ensure that systems relying on a MAX II device to perform power up functions are using the MAX II device in accordance with the specifications given in the Data Sheet. Before performing a test to verify the power-up time of a MAX II device under a certain load, you should set the V CCINT supply to 2.5 V or 3.3 V, depending on what it will be in the final system. The shunt on J9 controls this value. If the shunt is present on J9, the MAX II device’s V CCINT is 2.5 V; if the shunt is not present on J9, the V CCINT value is 3.3 V. The MAX II device data sheet specifies that a MAX II device will be functional less than 300 µs after minimum V CC level is reached. In actuality, configuration starts at a voltage below minimum V CC . A MAX II device on a board where the V CC rise time is greater than 1 ms will be fully powered-up and configured before the supply reaches minimum V CC . The Power-up demo allows users to investigate the power-up time in two different ways. The first is a race against the MAX II device that helps define what “Instant-on” means. The second is a much more detailed investigation of the power-up time that requires an oscilloscope, but provides a thorough understanding of how a MAX II device powers up under different loads. On Board Circuit The circuit on the board consists of a power regulator that provides the V CCINT voltage. The power regulator can be set to 2.5 V or 3.3 V by adding or removing a shunt on J9. (If the shunt is in place, V CCINT = 2.5 V; if the shunt is not in place, V CCINT = 3.3 V.) The load on the regulator can be increased by a variable resistor (POT1). Four test points are also provided on the board: V CCINT , V CCIO , GND, and a MAX II User I/O pin. These four test points are labeled Active I/O Test Points and are located near the prototyping area on the board. Refer to the MAX II Development Board Data Sheet if you cannot locate the test points on your board. These test points allow for oscilloscope probes to be attached so the outputs can be thoroughly examined. 2–8 Development Kit Version 1.0.0 Altera Corporation MAX II Development Kit Getting Started User Guide October 2004
Getting Started Figure 2–3. Active I/O Circuit Diagram Using the Demo Test 1: Race Against the MAX II Device 1. Program the MAX II device with the InstantOn.pof demo, located in the /Examples/HW/Demos directory. (Refer to “Programming the MAX II Device” on page 2–4 for details on how to load POF files into the MAX II device.) 2. The following message scrolls across the LCD. Wait for the message to complete: The MAX II device is instant= on. What is an instant? The MAX II device measures and displays T CONFIG . It also shows how much shorter this instant is than the shortest time in which you can push S2. 3. The LCD displays the following: TCONFIG = 137us SW2 low = 000*TCfg TCONFIG refers to the time it takes the MAX II device to configure under the current loading conditions. SW2 low refers to the number of times the MAX II device could have configured itself in the time that the button was depressed. This time is displayed as a multiple of the number of times that the MAX II device could have been Altera Corporation Development Kit Version 1.0.0 2–9 October 2004 MAX II Development Kit Getting Started User Guide
Page 1 and 2: MAX II Development Kit Getting Star
Page 3 and 4: Contents About this User Guide Revi
Page 5 and 6: About this User Guide Revision Hist
Page 7 and 8: Chapter 1. About this Kit The MAX
Page 9 and 10: Chapter 2. Getting Started System R
Page 11 and 12: Getting Started Figure 2-1. MAX II
Page 13 and 14: Getting Started Set Up the MAX II D
Page 15: Getting Started d. Pressing S2 a fo
Page 19 and 20: Getting Started V_INT shows the Cor
Page 21 and 22: Getting Started then the power. Sim
Page 23 and 24: Getting Started Figure 2-5. Program
Page 25 and 26: Getting Started Using the USB Refer
Page 27 and 28: Getting Started Figure 2-7. Device
Page 29 and 30: Getting Started e. Read the UFM—T
Page 31 and 32: Getting Started repeatedly pressing
Page 33 and 34: Getting Started ■ ■ ■ Start-u
Page 35 and 36: Getting Started c. Type the followi
Page 37 and 38: Getting Started 11. Push one of the

MAX II Development Kit Getting Started User Guide

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