EP2C5T144I8N Datasheet, PDF (394/470 Pages) Altera Corporation – Cyclone II Device Handbook, Volume 1

PS Configuration
nCONFIG low for at least 2 µs to restart configuration. The microprocessor
or controller can only transition the nCONFIG pin low if the pin is under
system control and not tied to V_CC.
The enhanced configuration devices support parallel configuration of up
to eight devices. The n-bit (n = 1, 2, 4, or 8) PS configuration mode allows
enhanced configuration devices to concurrently configure a chain of
FPGAs. These devices do not have to be the same device family or
density; they can be any combination of Altera FPGAs with different
designs. An individual enhanced configuration device DATA pin is
available for each targeted FPGA. Each DATA line can also feed a chain of
FPGAs. Figure 13–15 shows how to concurrently configure multiple
devices using an enhanced configuration device.
13–40
Cyclone II Device Handbook, Volume 1
Altera Corporation
February 2007