ep2c35 Altera Corporation, ep2c35 Datasheet - Page 73

• Manufacturer Part Number: ep2c35
• Description: Cyclone Ii Device Family Data Sheet
• Manufacturer: Altera Corporation

Altera Corporation
February 2007
Notes to
(1)
(2)
(3)
(4)
(5)
(6)
Table 2–20. Cyclone II MultiVolt I/O Support (Part 2 of 2)
V
CCIO
3.3
The PCI clamping diode must be disabled to drive an input with voltages higher than V
These input values overdrive the input buffer, so the pin leakage current is slightly higher than the default value.
To drive inputs higher than V
overdrive for LVTTL/LVCMOS input pins option in Device setting option in the Quartus II software.
When V
When V
feeds an input pin, the V
that the input signal level does not drive to the V
When V
When V
(V)
Table
CCIO
CCIO
CCIO
CCIO
2–20:
1.5 V
= 1.8-V, a Cyclone II device can drive a 1.5-V device with 1.8-V tolerant inputs.
= 3.3-V and a 2.5-V input signal feeds an input pin or when V
= 2.5-V, a Cyclone II device can drive a 1.5-V or 1.8-V device with 2.5-V tolerant inputs.
= 3.3-V, a Cyclone II device can drive a 1.5-V, 1.8-V, or 2.5-V device with 3.3-V tolerant inputs.
1.8 V
CCIO
Input Signal
supply current will be slightly larger than expected. The reason for this increase is
CCIO
but less than 4.0 V, disable the PCI clamping diode and turn on Allow voltage
v
2.5 V
(4)
CCIO
3.3 V
v
rail, which causes the input buffer to not completely shut off.
v
Note (1)
1.5 V
(6)
Cyclone II Device Handbook, Volume 1
C C I O
v
1.8 V
Output Signal
= 1.8-V and a 1.5-V input signal
(6)
Cyclone II Architecture
CCIO
v
2.5 V
.
(6)
3.3 V
v
2–61