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CLK15_6P Cyclone III Device Handbook
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Part No.:   CLK15_6P
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Description:   Cyclone III Device Handbook
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Page : 274 Pages
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Chapter 9: Configuration, Design Security, and Remote System Upgrades in the Cyclone III Device Family
Configuration Features
9–11
(during the first frame of configuration data), the
INIT_DONE
pin goes low. When
initialization is complete, the
INIT_DONE
pin is released and pulled high. This low-to-
high transition signals that the device has entered user mode. In user mode, the user
I/O pins function as assigned in your design and no longer have weak pull-up
resistors.
Configuration Scheme
A configuration scheme with different configuration voltage standards is selected by
driving the MSEL pins either high or low, as listed in
The MSEL pins are powered by V
CCINT
. The
MSEL[3..0]
pins have 9-k internal
pull-down resistors that are always active.
1
Smaller Cyclone III devices or package options (E144, M164, Q240, F256, and U256
packages) do not have the
MSEL[3]
pin. The AS Fast POR configuration scheme at 3.0-
or 2.5-V configuration voltage standard and the AP configuration scheme are not
supported in Cyclone III devices without the
MSEL[3]
pin. To configure these devices
with other supported configuration schemes, select the
MSEL[2..0]
pins according to
the MSEL settings in
Hardwire the MSEL pins to V
CCA
or GND without any pull-up or pull-down resistors
to avoid any problems detecting an incorrect configuration scheme. Do not drive the
MSEL pins with a microprocessor or another device.
The Quartus II software prohibits you from using the LVDS I/O standard in I/O
Bank 1 when the configuration device I/O voltage is not 2.5 V. If you need to assign
LVDS I/O standard in I/O Bank 1, navigate to
Assignments>Device>Settings>Device and Pin Option>Configuration to change the
Configuration Device I/O voltage to
2.5 V
or
Auto.
1
1
Table 9–7. Cyclone III Device Family Configuration Schemes
Configuration Scheme
3
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)
0
0
1
0
0
1
1
0
2
0
0
1
1
1
0
0
1
(Part 1 of 2)
Configuration Voltage Standard (V)
1
1
1
0
0
1
1
0
0
0
0
1
1
0
1
1
0
1
MSEL
3.3
3.0/2.5
3.3
3.0/2.5
3.3
3.0/2.5
1.8
3.3
August 2012
Altera Corporation
Cyclone III Device Handbook
Volume 1
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