ACEX 1K Programmable Logic Device Family Data Sheet
Figure 22 shows the required relationship between VCCIO and VCCINT to
satisfy 3.3-V PCI compliance.
Figure 22. Relationship between VCCIO & VCCINT for 3.3-V PCI Compliance
2.7
VCCIIINT (V)
PCI-Compliant Region
2.5
2.3
13
3.0
3.1
3.3
3.6
VCCIO (V)
Figure 23 shows the typical output drive characteristics of ACEX 1K
devices with 3.3-V and 2.5-V VCCIO. The output driver is compliant to the
3.3-V PCI Local Bus Specification, Revision 2.2 (when VCCIOpins are
connected to 3.3 V). ACEX 1K devices with a -1 speed grade also comply
with the drive strength requirements of the PCI Local Bus Specification,
Revision 2.2 (when VCCINTpins are powered with a minimum supply of
2.375 V, and VCCIOpins are connected to 3.3 V). Therefore, these devices
can be used in open 5.0-V PCI systems.
Altera Corporation
49
ALTERA [ ALTERA CORPORATION ]
