9–68
Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
Table 9–22. Dedicated Configuration Pins on Cyclone III Device Family (Part 3 of 4)
Pin Name
User
Mode
Configuration
Scheme
Pin Type
Description
Data input. In serial configuration modes, bit-wide
configuration data is presented to the target Cyclone III
device family on the
DATA[0]
pin.
In AS mode,
DATA[0]
has an internal pull-up resistor that is
Input (PS, always active. After AS configuration,
DATA[0]
is a dedicated
FPP, AS).
input pin with optional user control.
Bidirectional
After PS or FPP configuration,
DATA[0]
is available as a user
(AP)
I/O pin and the state of this pin depends on the
Dual-Purpose
Pin
settings.
After AP configuration,
DATA[0]
is a dedicated bidirectional
pin with optional user control.
Data input in non-AS mode. Control signal from the
Cyclone III device family to the serial configuration device in
AS mode used to read out configuration data. The
DATA[1]
pin functions as the
ASDO
pin in AS mode.
In AS mode,
DATA[1]
has an internal pull-up resistor that is
always active. After AS configuration,
DATA[1]
is a dedicated
output pin with optional user control.
DATA[1],
ASDO
I/O
FPP, AS, AP
DATA[0]
I/O
PS, FPP, AS,
AP
Input (FPP),
In PS configuration scheme,
DATA[1]
functions as user I/O
Output (AS).
pin during configuration, which means it is tri-stated.
Bidirectional
After FPP configuration,
DATA[1]
is available as a user I/O
(AP)
pin and the state of this pin depends on the
Dual-Purpose
Pin
settings.
In AP configuration scheme, which is for Cyclone III devices
only, the byte-wide or word-wide configuration data is
presented to the target Cyclone III device on
DATA[7..0]
or
DATA[15..0],
respectively. After AP configuration,
DATA[1]
is a dedicated bidirectional pin with optional user control.
Data inputs.
In AS or PS configuration schemes, they function as user I/O
pins during configuration, which means they are tri-stated.
After FPP configuration,
DATA[7..2]
are available as user
Inputs
I/O pins and the state of these pin depends on the
(FPP).
Dual-Purpose Pin
settings.
Bidirectional
The byte-wide or word-wide configuration data is presented
(AP)
to the target Cyclone III device on
DATA[7..0]
or
DATA[15..0]
, respectively, in the AP configuration scheme
(for Cyclone III devices only). After AP configuration,
DATA[7..2]
are dedicated bidirectional pins with optional
user control.
Data inputs. Word-wide configuration data is presented to the
target Cyclone III device on
DATA[15..0].
DATA[7..2]
I/O
FPP, AP
DATA[15..8]
I/O
AP
In PS, FPP, or AS configuration schemes, they function as
Bidirectional user I/O pins during configuration, which means they are
tri-stated.
After AP configuration,
DATA[15:8]
are dedicated
bidirectional pins with optional user control.
Cyclone III Device Handbook
Volume 1
August 2012 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
