Enhanced Configuration (EPC) Devices Datasheet

ID 683253
Date 5/04/2016
Public

1.9. Timing Information

Figure 7. Configuration Timing Waveform Using an EPC Device
Table 13.   EPC Device Configuration Timing Parameters
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.