EP2S180F1020C4 Datasheet, PDF (651/768 Pages) Altera Corporation – Stratix II Device Handbook, Volume 1

Configuring Stratix II and Stratix II GX Devices
Table 7–22. Dedicated Configuration Pins on the Stratix II and Stratix II GX Device (Part 6 of 10)
Pin Name
nCEO
ASDO
User Mode
Configuration
Scheme
N/A
All
N/A in AS
AS
mode I/O in
non-AS
mode
Pin Type
Output
Output
Description
Output that drives low when device
configuration is complete. In single device
configuration, this pin is left floating. In
multi-device configuration, this pin feeds the
next device’s nCE pin. The nCEO of the last
device in the chain is left floating. The nCEO
pin is powered by V_{C C I O} in I/O bank 7. For
recommendations on how to connect nCEO in
a chain with multiple voltages across the
devices in the chain, refer to the Stratix II
Architecture chapter in volume 1 of the
Stratix II Handbook or the Stratix II GX
Architecture chapter in volume 1 of the
Stratix II GX Device Handbook.
Control signal from the Stratix II or
Stratix II GX device to the serial configuration
device in AS mode used to read out
configuration data.
nCSO
N/A in AS
AS
mode I/O in
non-AS
mode
Output
In AS mode, ASDO has an internal pull-up
resistor that is always active.
Output control signal from the Stratix II or
Stratix II GX device to the serial configuration
device in AS mode that enables the
configuration device.
In AS mode, nCSO has an internal pull-up
resistor that is always active.
Altera Corporation
January 2008
7–99
Stratix II Device Handbook, Volume 2