6–16 Chapter 6: I/O Features in Cyclone IV Devices
I/O Banks
Cyclone IV Device Handbook, March 2016 Altera Corporation
Volume 1
I/O Banks
I/O pins on Cyclone IV devices are grouped together into I/O banks. Each bank has a
separate power bus.
Cyclone IV E devices have eight I/O banks, as shown in Figure 6–9. Each device I/O
pin is associated with one I/O bank. All single-ended I/O standards are supported in
all banks except HSTL-12 Class II, which is only supported in column I/O banks. All
differential I/O standards are supported in all banks. The only exception is HSTL-12
Class II, which is only supported in column I/O banks.
Cyclone IV GX devices have up to ten I/O banks and two configuration banks, as
shown in Figure 6–10 on page 6–18 and Figure 6–11 on page 6–19. The Cyclone IV GX
configuration I/O bank contains three user I/O pins that can be used as normal user
I/O pins if they are not used in configuration modes. Each device I/O pin is
associated with one I/O bank. All single-ended I/O standards are supported except
HSTL-12 Class II, which is only supported in column I/O banks. All differential I/O
standards are supported in top, bottom, and right I/O banks. The only exception is
HSTL-12 Class II, which is only supported in column I/O banks.
The entire left side of the Cyclone IV GX devices contain dedicated high-speed
transceiver blocks for high speed serial interface applications. There are a total of 2, 4,
and 8 transceiver channels for Cyclone IV GX devices, depending on the density and
package of the device. For more information about the transceiver channels
supported, refer to Figure 6–10 on page 6–18 and Figure 6–11 on page 6–19.
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