EP2S130F1020I4 Datasheet, PDF (648/768 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 3 of 10)
Pin Name
nCONFIG
User Mode
Configuration
Scheme
N/A
All
Pin Type
Input
Description
Configuration control input. Pulling this pin low
during user-mode will cause the device to lose
its configuration data, enter a reset state,
tri-state all I/O pins. Returning this pin to a
logic high level will initiate a reconfiguration.
If your configuration scheme uses an
enhanced configuration device or EPC2
device, nCONFIG can be tied directly to V_{C C}
or to the configuration device’s nINIT_CONF
pin.
nSTATUS
N/A
All
Bidirectional The device drives nSTATUS low immediately
open-drain after power-up and releases it after the POR
time.
Status output. If an error occurs during
configuration, nSTATUS is pulled low by the
target device.
Status input. If an external source drives the
nSTATUS pin low during configuration or
initialization, the target device enters an error
state.
Driving nSTATUS low after configuration and
initialization does not affect the configured
device. If a configuration device is used,
driving nSTATUS low will cause the
configuration device to attempt to configure
the device, but since the device ignores
transitions on nSTATUS in user-mode, the
device does not reconfigure. To initiate a
reconfiguration, nCONFIG must be pulled low.
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.
7–96
Stratix II Device Handbook, Volume 2
Altera Corporation
January 2008