EP4SE360F35I4 Datasheet, PDF (182/432 Pages) Altera Corporation – This section provides a complete overview of all features relating to the Stratix IV device family, which is the most architecturlly advanced

6–8
Chapter 6: I/O Features in Stratix IV Devices
I/O Banks
Modular I/O Banks
The I/O pins in Stratix IV devices are arranged in groups called modular I/O banks.
Depending on device densities, the number of Stratix IV device I/O banks range from
16 to 24. The number of I/O pins on each bank is 24, 32, 36, 40, or 48. Figure 6–4
through Figure 6–16 show the number of I/O pins available in each I/O bank.
In Stratix IV devices, the maximum number of I/O banks per side is either 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 that 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 the same “B” banks.
After migration from a smaller device to a larger device, the bank size increases or
remains the same, but never decreases. For example, the number of I/O pins to a bank
may increase from 24 to 26, 32, 36, 40, 42, or 48, but will never decrease. This is shown
in Figure 6–3.
Figure 6–3. Bank Migration Path with Increasing Device Size
24 26
32
36 40
42
48
Stratix IV Device Handbook
Volume 1
September 2012 Altera Corporation