Initialization; User Mode; Device Configuration Pins - Altera Cyclone V Device Handbook

7-6

Initialization

If you do not turn on this option, you can monitor the
pull the
nCONFIG
Related Information
Cyclone V Device Datasheet
Provides more information about t
Initialization
The initialization clock source is from the internal oscillator,
oscillator is the clock source for initialization. If you use the internal oscillator, the Cyclone V device will be
provided with enough clock cycles for proper initialization.
Note: If you use the optional
low to restart configuration during device initialization, ensure that the
toggling until the
The pin provides you with the flexibility to synchronize initialization of multiple devices or to delay
CLKUSR
initialization. Supplying a clock on the
the
CONF_DONE
this time period elapses, Cyclone V devices require a minimum number of clock cycles as specified by T
to initialize properly and enter user mode as specified by the t
Related Information
Cyclone V Device Datasheet
Provides more information about t
source.

User Mode

You can enable the optional
pulled high, initialization completes and your design starts executing. The user I/O pins will then function
as specified by your design.

Device Configuration Pins

Configuration Pins Summary
The following table lists the Cyclone V configuration pins and their power supply.
Note: The
TDI
Note: The
CLKUSR
and by V
Altera Corporation
pin low for at least the duration of t
STATUS
pin as the initialization clock source and the
CLKUSR
pin goes low and then goes high again.
nSTATUS
CLKUSR
pin goes high, the
CLKUSR
CD2CU
INIT_DONE
, , , and pins are powered by V
TMS TCK TDO
, , , and
DEV_OE DEV_CLRn
of the bank in which the pin resides if you use it as a user I/O pin.
CCIO
Configuration, Design Security, and Remote System Upgrades in Cyclone V Devices
pin to detect errors. To restart configuration,
nSTATUS
.
CFG
and t timing parameters.
CFG
CLKUSR
pin during initialization does not affect configuration. After
or pin is enabled after the time specified by t
DCLK
CD2UMC
, t , and t timing parameters, and initialization clock
init CD2UMC
pin to monitor the initialization stage. After the
of the bank in which the pin resides.
CCPD
pins are powered by V
DATA[15..5]
pin, or pin. By default, the internal
DCLK
nCONFIG
or
CLKUSR DCLK
CD2CU
parameter.
INIT_DONE
during configuration
CCPGM
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CV-52007
2014.01.10
pin is pulled
pin continues
. When
init
pin is