pASIC 3 FPGA Family Data Sheet Rev. D
Power-Up Sequencing
Figure 5: Power-Up Requirements
VCCIO
VCC
(VCCIO -VCC)MAX
VCC
400 us
Time
When powering up a device, the VCC/VCCIO rails must take 400 µs or longer to reach the maximum value
(refer to Figure 5).
NOTE: Ramping VCC/VCCIO to the maximum voltage faster than 400 µs can cause the device to behave
improperly.
For users with a limited power budget, keep (VCCIO -VCC)MAX ≤ 500 mV when ramping up the power supply.
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