Typical Duration (µs)
(28)
Maximum Power Supply
Current Transient (mA)
Power Rail
50
400
V
CCPD_HPS
(33)
,
(34)
,
(35)
200
100
V
CCIO_HPS
(33)
,
(36)
,
(35)
100
420
V
CC_HPS
(32)
,
(33)
Related Information
PowerPlay Early Power Estimators (EPE) and Power Analyzer
Provides more information about the PowerPlay EPE support for Cyclone V devices.
Power-On Reset Circuitry
The POR circuitry keeps the Cyclone V device in the reset state until the power supply outputs are within
the recommended operating range.
A POR event occurs when you power up the Cyclone V device until the power supplies reach the
recommended operating range within the maximum power supply ramp time, t
RAMP
. If t
RAMP
is not met,
the Cyclone V device I/O pins and programming registers remain tri-stated, during which device configuration
could fail.
(28)
Only typical duration is provided as it may vary on the board design.
(33)
These power rails are only available on Cyclone V SX, SE and ST devices.
(34)
You may observe the current transient at V
CCPD_HPS
only when you do not follow the recommended power-
up sequence. To avoid the current transient at V
CCPD_HPS
, follow the recommended power-up sequence.
(35)
The maximum current for V
CCIO_HPS
and V
CCPD_HPS
applies to all voltage levels supported by the Cyclone V
device.
(36)
You may observe the current transient at V
CCIO_HPS
if you power up V
CCIO_HPS
before V
CCPD_HPS
. To avoid
the current transient at V
CCIO_HPS
, follow the recommended power-up sequence by powering up V
CCIO_HPS
and V
CCPD_HPS
together.
Altera Corporation
Power Management in Cyclone V Devices
10-5
Power-On Reset Circuitry
CV-52010
2014.01.10