9–6
Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
In Cyclone III device family, you can select either a fast POR time or standard POR
time depending on the MSEL pin settings. The fast POR time is 3 ms < TPOR < 9 ms
for the fast configuration time. The standard POR time is 50 ms < TPOR < 200 ms,
which has a lower power-ramp rate.
lists the supported POR times for each configuration scheme.
Table 9–2. Cyclone III Device Family Supported POR Times Across Configuration Schemes
Configuration Scheme
Fast Active Serial Standard (AS Standard POR)
Fast Active Serial Standard (AS Standard POR)
Fast Active Serial Fast (AS Fast POR)
Fast Active Serial Fast (AS Fast POR)
Active Parallel ×16 Standard (AP Standard POR, for
Cyclone III devices only)
Active Parallel ×16 Standard (AP Standard POR, for
Cyclone III devices only)
Active Parallel ×16 Standard (AP Standard POR, for
Cyclone III devices only)
Active Parallel ×16 Fast (AP Fast POR, for
Cyclone III devices only)
Active Parallel ×16 Fast (AP Fast POR, for
Cyclone III devices only)
Passive Serial Standard (PS Standard POR)
Passive Serial Fast (PS Fast POR)
Fast Passive Parallel Fast (FPP Fast POR)
Fast Passive Parallel Fast (FPP Fast POR)
JTAG-based configuration
Notes to
(1) Altera recommends connecting the MSEL pins to V
CCA
or GND depending on the MSEL pin settings.
(2) The configuration voltage standard is applied to the V
CCIO
supply of the bank in which the configuration pins reside.
(3) JTAG-based configuration takes precedence over other configuration schemes, which means the MSEL pin settings are ignored. However, the
POR time is dependent on the MSEL pin settings.
Fast POR Time
(3 ms< TPOR < 9 ms)
—
—
v
v
—
—
—
v
v
—
v
v
v
Standard POR Time
(50 ms< TPOR < 200 ms)
v
v
—
—
v
v
v
—
—
v
—
—
—
Configuration
Voltage
Standard (V)
3.3
3.0/2.5
3.3
3.0/2.5
3.3
3.0/2.5
1.8
3.3
1.8
3.3/3.0/2.5
3.3/3.0/2.5
3.3/3.0/2.5
1.8/1.5
—
In some applications, it is necessary for a device to wake up very quickly to begin
operation. The Cyclone III device family offers the fast
POR time
option to support
fast wake-up time applications. The
fast POR time
option has stricter power-up
requirements when compared with the
standard POR time
option. You can select
either the fast POR or standard POR options with the MSEL pin settings.
1
The automotive application is for Cyclone III devices only. The Cyclone III devices
fast wake-up time meets the requirement of common bus standards in automotive
applications, such as Media Orientated Systems Transport (MOST) and Controller
Area Network (CAN).
f
For more information about wake-up time and the POR circuit, refer to the
chapter.
Cyclone III Device Handbook
Volume 1
August 2012 Altera Corporation
ALTERA [ ALTERA CORPORATION ]
