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Chapter 6: I/O Features in Cyclone IV Devices

I/O Banks

Cyclone IV Device Handbook,

May 2013

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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