EP2S130F1020I4 Datasheet, PDF (650/768 Pages) List of Unclassifed Manufacturers – Stratix II Device Handbook, Volume 1

Device Configuration Pins
Table 7–22. Dedicated Configuration Pins on the Stratix II and Stratix II GX Device (Part 5 of 10)
Pin Name
CONF_DONE
User Mode
Configuration
Scheme
Pin Type
Description
N/A
All
Bidirectional Status output. The target device drives the
open-drain CONF_DONE pin low before and during
configuration. Once all configuration data is
received without error and the initialization
cycle starts, the target device releases
CONF_DONE.
Status input. After all data is received and
CONF_DONE goes high, the target device
initializes and enters user mode. The
CONF_DONE pin must have an external 10-k
pull-up resistor in order for the device to
initialize.
Driving CONF_DONE low after configuration
and initialization does not affect the configured
device.
nCE
The enhanced configuration devices’ and
EPC2 devices’ OE and nCS pins have optional
internal programmable pull-up resistors. If
internal pull-up resistors on the enhanced
configuration device are used, external 10-k
pull-up resistors should not be used on these
pins. When using EPC2 devices, only external
10-k pull-up resistors should be used.
N/A
All
Input
Active-low chip enable. The nCE pin activates
the device with a low signal to allow
configuration. The nCE pin must be held low
during configuration, initialization, and user
mode. In single device configuration, it should
be tied low. In multi-device configuration, nCE
of the first device is tied low while its nCEO pin
is connected to nCE of the next device in the
chain.
The nCE pin must also be held low for
successful JTAG programming of the device.
7–98
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008