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
1.9. Timing Information
Figure 7. Configuration Timing Waveform Using an EPC Device
| Symbol | Parameter | Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| fDCLK | DCLK frequency | 40% duty cycle | — | — | 66.7 | MHz |
| tDCLK | DCLK period | — | 15 | — | — | ns |
| tHC | DCLK duty cycle high time | 40% duty cycle | 6 | — | — | ns |
| tLC | DCLK duty cycle low time | 40% duty cycle | 6 | — | — | ns |
| tCE | OE to first DCLK delay | — | 40 | — | — | ns |
| tOE | OE to first DATA available | — | 40 | — | — | ns |
| tOH | DCLK rising edge to DATA change | — | 6 | — | — | ns |
| tCF 7 | OE assert to DCLK disable delay | — | 277 | — | — | ns |
| tDF 7 | OE assert to DATA disable delay | — | 277 | — | — | ns |
| tRE 8 | DCLK rising edge to OE | — | 60 | — | — | ns |
| tLOE | OE assert time to assure reset | — | 60 | — | — | ns |
| fECLK 9 | EXCLK input frequency | 40% duty cycle | — | — | 100 | MHz |
6 To calculate tOH, use the following equation: tOH = 0.5 (DCLK period) - 2.5 ns.
7 This parameter is used for CRC error detection by the FPGA.
8 This parameter is used for CONF_DONE error detection by the EPC device.
9 The FPGA VCCINT ramp time should be less than 1ms for 2-ms POR and it should be less than 70 ms for 100-ms POR.