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EP2AGX95EF29C6N Datasheet, PDF (292/380 Pages) Altera Corporation – Device Interfaces and Integration
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9–6
Chapter 9: Configuration, Design Security, and Remote System Upgrades in Arria II Devices
Power-On Reset Circuit and Configuration Pins Power Supply
VCCPD Pins
Arria II devices have a dedicated programming power supply, the VCCPD pins.
Table 9–5 lists the power supply for Arria II devices.
Table 9–5. Power Supply for Arria II Devices
Devices
Arria II GX
Arria II GZ
Programming Power Supply
VCCPD must be connected to 3.3, 3.0, or 2.5 V to power the I/O pre-drivers,
HSTL/SSTL input buffers, and MSEL[3..0] pins.
VCCPD and VCCIO for I/O banks 3C and 8C must ramp up from 0 V to the desired
voltage level within 100 ms when PORSEL is low or 4 ms when PORSEL is high. If
these supplies are not ramped up in this specified time, your Arria II GX device
will not configure successfully. If the system cannot ramp up the power supplies
within 100 ms or 4 ms, you must hold nCONFIG low until all the power supplies
are stable.
You must connect VCCPD according to the I/O standard used in the same bank:
■ For 3.3-V I/O standards, connect VCCPD to 3.3 V.
■ For 3.0-V I/O standards, connect VCCPD to 3.0 V.
■ For 2.5-V and below I/O standards, connect VCCPD to 2.5 V.
VCCPD must be connected to 3.0 or 2.5 V to power the I/O pre-drivers and JTAG
I/O pins (TCK, TMS, TDI, TDO, and TRST).
VCCPD and VCCPGM must ramp up from 0 V to the desired voltage level within
100 ms when PORSEL is low or 4 ms when PORSEL is high. If these supplies are
not ramped up in this specified time, your Arria II GZ device will not configure
successfully. If the system cannot ramp up the power supplies within 100 ms or
4 ms, you must hold nCONFIG low until all the power supplies are stable.
VCCPD must be greater than or equal to VCCIO of the same bank:
■ If the VCCIO of the bank is powered to 3.0 V, VCCPD must be powered up to
3.0 V.
■ If the VCCIO of the bank is powered to 2.5 V or lower, VCCPD must be powered
up to 2.5 V.
For more information about configuration pins power supply, refer to “Device
Configuration Pins” on page 9–39.
Arria II Device Handbook Volume 1: Device Interfaces and Integration
July 2012 Altera Corporation
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