EP3C25F256I7N Altera, EP3C25F256I7N Datasheet - Page 26

• Manufacturer Part Number: EP3C25F256I7N
• Description: IC CYCLONE III FPGA 25K 256 FBGA
• Manufacturer: Altera
• Series: Cyclone® IIIr

Specifications of EP3C25F256I7N

• Number Of Logic Elements/cells: 24624
• Number Of Labs/clbs: 1539
• Total Ram Bits: 608256
• Number Of I /o: 156
• Voltage - Supply: 1.15 V ~ 1.25 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 256-FBGA
• For Use With: 544-2601 - KIT DEV CYCLONE III LS EP3CLS200544-2411 - KIT DEV NIOS II CYCLONE III ED.544-2370 - KIT STARTER CYCLONE III EP3C25
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -
• Other names: 544-2543

Page 26
Board Design Considerations
MSEL Configuration Mode Pins
Select the configuration scheme by driving the Cyclone III device MSEL pins either
high or low. The MSEL pins are powered by the V
power supply of the bank in
CCINT
Ω
which they reside. The MSEL[3..0] pins have 5-k
internal pull-down resistors that
are always active. During power-on reset (POR) and during reconfiguration, the MSEL
pins have to be at least LVTTL V
or V
levels to be considered a logic low or logic
IL
IH
high, respectively. To avoid any problems with detecting an incorrect configuration
scheme, hardwire the MSEL pins to V
and GND without any pull-up or pull-down
CCA
resistors. Alternatively, set up your board so that you can connect each pin to either
Ω
V
or GND with a 0-
resistor to change between configuration modes during
CCA
testing or debugging. Altera recommends not to drive the MSEL pins with a
microprocessor or another device.
1
Do not leave the MSEL pins floating.
f
For more information about configuration, refer to the
Configuring Cyclone III Devices
chapter in volume 1 of the Cyclone III Device Handbook. Also refer to the
Configuration
Center, which includes links to troubleshooters that you can use to help debug
configuration problems. To help you debug JTAG programming issues, refer to the
JTAG Configuration & ISP
Troubleshooter. To debug FPGA configuration issues, refer
to the
FPGA Configuration
Troubleshooter.
© November 2008 Altera Corporation