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1.1. Supported Devices
1.2. Features
1.3. Functional Description
1.4. Pin Description
1.5. Power-On Reset
1.6. Power Sequencing
1.7. Programming and Configuration File Support
1.8. IEEE Std. 1149.1 (JTAG) Boundary-Scan
1.9. Timing Information
1.10. Operating Conditions
1.11. Package
1.12. Document Revision History
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1.8. IEEE Std. 1149.1 (JTAG) Boundary-Scan
The EPC device provides JTAG BST circuitry that complies with the IEEE Std. 1149.1-1990 specification. JTAG BST can be performed before or after configuration, but not during configuration.
Figure 6. JTAG Timing Waveforms
Symbol | Parameter | Min | Max | Unit |
---|---|---|---|---|
tJCP | TCK clock period | 100 | — | ns |
tJCH | TCK clock high time | 50 | — | ns |
tJCL | TCK clock low time | 50 | — | ns |
tJPSU | JTAG port setup time | 20 | — | ns |
tJPH | JTAG port hold time | 45 | — | ns |
tJPCO | JTAG port clock output | — | 25 | ns |
tJPZX | JTAG port high impedance to valid output | — | 25 | ns |
tJPXZ | JTAG port valid output to high impedance | — | 25 | ns |
tJSSU | Capture register setup time | 20 | — | ns |
tJSH | Capture register hold time | 45 | — | ns |
tJSCO | Update register clock to output | — | 25 | ns |
tJSZX | Update register high-impedance to valid output | — | 25 | ns |
tJSXZ | Update register valid output to high impedance | — | 25 | ns |