ep2sgx60e Altera Corporation, ep2sgx60e Datasheet - Page 34

• Manufacturer Part Number: ep2sgx60e
• Description: 4. Serial Configuration Devices Epcs1, Epcs4, Epcs16, Epcs64, And Epcs128 Data Sheet
• Manufacturer: Altera Corporation

Power and Operation
4–34
Configuration Handbook, Volume 2
f
Power-On Reset
During initial power-up, a POR delay occurs to ensure the system voltage
levels have stabilized. During AS configuration, the FPGA controls the
configuration and has a longer POR delay than the serial configuration
device.
For the POR delay time, refer to the configuration chapter in the
appropriate device handbook.
Error Detection
During AS configuration with the serial configuration device, the FPGA
monitors the configuration status through the nSTATUS and CONF_DONE
pins. If an error condition occurs (nSTATUS drives low) or if the
CONF_DONE pin does not go high, the FPGA will initiate reconfiguration
by pulsing the nSTATUS and nCSO signals, which controls the chip select
pin on the serial configuration device (nCS).
After an error, configuration automatically restarts if the Auto-Restart
Upon Frame Error option is turned on in the Quartus II software. If the
option is turned off, the system must monitor the nSTATUS signal for
errors and then pulse the nCONFIG signal low to restart configuration.
Altera Corporation
May 2008