EP3SE50F780I3N Altera, EP3SE50F780I3N Datasheet - Page 226

• Manufacturer Part Number: EP3SE50F780I3N
• Description: Stratix III
• Manufacturer: Altera

Stratix III I/O Banks
7–8
Stratix III Device Handbook, Volume 1
Modular I/O Banks
The I/O pins in Stratix III devices are arranged in groups called modular
I/O banks. Depending on device densities, the number of I/O banks
range from 16 to 24 banks. The size of each bank is 24, 32, 36, 40, or 48 I/O
pins.
I/O bank.
In Stratix III devices, the maximum number of I/O banks per side is four
or six, depending on the device density. When migrating between devices
with a different number of I/O banks per side, it is the middle or “B”
bank which is removed or inserted. For example, when moving from a
24-bank device to a 16-bank device, the banks that are dropped are “B”
banks, namely: 1B, 2B, 3B, 4B, 5B, 6B, 7B, and 8B. Similarly, when moving
from a 16-bank device to a 24-bank device, the banks that are added are
“B” banks namely: 1B, 2B, 3B, 4B, 5B, 6B, 7B, and 8B.
During migration from a smaller device to a larger device, the bank size
increases or remains the same but never decreases. For example, banks
may increase from a size of 24 I/O to a bank of size 32, 36, 40,or 48 I/O,
but will never decrease. This is shown in
Figure 7–2. Bank Migration Path with Increasing Device Size
Figures 7–4
Figure 2. Bank Migration Path with increasing device size
24
to
7–6
show the number of I/O pins available in each
32
36
40
Figure
48
7–2.
Altera Corporation
November 2007