12–10
Chapter 12: Real-Time ISP and ISP Clamp for MAX II Devices
Conclusion
Figure 12–12. Quartus II Programmer Window with ISP Clamp Checkbox
ISP Clamp with Jam/JBC Files
The Jam or JBC files used for ISP clamp should contain all the pin state information
and do not need any IPS file. Always use the POF file with pin state information to
create the Jam or JBC files. The pin state information can be stored into the POF
through the Assignment Editor or saving the pin state information to the POF as
mentions earlier. The Jam or JBC files can be used with the Quartus II programmer, or
with the Jam or JBC player, respectively.
Conclusion
With the real-time ISP and ISP clamp features in MAX II devices, you can set the I/O
pins of a device to certain states while programming the device. Through real-time
ISP, you can program a MAX II device at any time without affecting the functionality
of your system. The ISP clamp feature allows you to hold the I/O pins of a device to
specific states when programming the device.
Referenced Documents
This chapter references the following document:
■
DC and Switching Characteristics chapter in the MAX II Device Handbook
MAX II Device Handbook
© October 2008 Altera Corporation
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