EP3C16F256I7N Altera, EP3C16F256I7N Datasheet - Page 188

• Manufacturer Part Number: EP3C16F256I7N
• Description: Cyclone III
• Manufacturer: Altera

Cyclone III Device I/O Features
7–36
Cyclone III Device Handbook, Volume 1
After applying the equation above, apply one of the equations in
Table
When at least one additional output exists but no voltage referenced
inputs exist, apply the appropriate formula from
When additional voltage referenced inputs and other outputs exist in the
same V
simultaneously adhere to the input and output limitations. As such, the
following rules apply:
FineLine BGA
QFP
FineLine BGA
QFP
Table 7–10. Bidirectional Pad Limitation Formulas (Where V
Table 7–11. Bidirectional Pad Limitation Formulas (Where V
Exist)
Package Type
Package Type
Total number of bidirectional pads + total number of input pads
for Fineline BGA packages
Total number of bidirectional pads + total number of input pads
for QFP packages
7–10, depending on the package type.
REF
bank, the bidirectional pad limitation must again
(Total number of bidirectional pads) ≤ 9 (per
ground pair)
(Total number of bidirectional pads) ≤ 5 (per
ground pair)
(Total number of bidirectional pads) + (Total number of
additional output pads) – (Total number of pads from the
smallest group of pads controlled by an OE) ≤ 9 (per
and ground pair)
(Total number of bidirectional pads) + (Total number of
additional output pads) – (Total number of pads from the
smallest group of pads controlled by an OE) ≤ 5 (per
and ground pair)
Formula
Formula
Altera Corporation-Preliminary
Table
7–11.
REF
REF
VCCIO
VCCIO
Inputs Exist)
Outputs
March 2007
and
and
V
V
CCIO
CCIO
≤
≤
32
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