EP1C3 ALTERA [Altera Corporation], EP1C3 Datasheet - Page 60

• Manufacturer Part Number: EP1C3
• Description: Cyclone FPGA Family
• Manufacturer: ALTERA [Altera Corporation]

Cyclone FPGA Family Data Sheet
Notes to
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
Power
Sequencing &
Hot Socketing
IEEE Std.
1149.1 (JTAG)
Boundary Scan
Support
60
Table 17. Cyclone MultiVolt I/O Support
The PCI clamping diode must be disabled to drive an input with voltages higher than V
When V
When V
When V
than expected.
When V
Cyclone devices can be 5.0-V tolerant with the use of an external resistor and the internal PCI clamp diode.
When V
When V
V
CCIO
1.5
1.8
2.5
3.3
Table
(V)
CCIO
CCIO
CCIO
CCIO
CCIO
CCIO
17:
= 1.5 V and a 2.5- or 3.3-V input signal feeds an input pin, higher pin leakage current is expected.
= 1.8 V, a Cyclone 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, the V
= 2.5 V, a Cyclone device can drive a 1.5-V or 1.8-V device with 2.5-V tolerant inputs.
= 3.3 V, a Cyclone device can drive a 1.5-V, 1.8-V, or 2.5-V device with 3.3-V tolerant inputs.
= 3.3 V, a Cyclone device can drive a device with 5.0-V LVTTL inputs but not 5.0-V LVCMOS inputs.
1.5 V
v
The Cyclone V
supply. If the V
and 3.3-V tolerant. The V
1.8-V, 2.5-V, or 3.3-V power supply, depending on the output
requirements. The output levels are compatible with systems of the same
voltage as the power supply (i.e., when V
1.5-V power supply, the output levels are compatible with 1.5-V systems).
When V
is 3.3 V and is compatible with 3.3-V or 5.0-V systems.
summarizes Cyclone MultiVolt I/O support.
Because Cyclone devices can be used in a mixed-voltage environment,
they have been designed specifically to tolerate any possible power-up
sequence. Therefore, the V
powered in any order.
Signals can be driven into Cyclone devices before and during power up
without damaging the device. In addition, Cyclone devices do not drive
out during power up. Once operating conditions are reached and the
device is configured, Cyclone devices operate as specified by the user.
All Cyclone devices provide JTAG BST circuitry that complies with the
IEEE Std. 1149.1a-1990 specification. JTAG boundary-scan testing can be
performed either before or after, but not during configuration. Cyclone
devices can also use the JTAG port for configuration together with either
the Quartus II software or hardware using either Jam Files (.jam) or Jam
Byte-Code Files (.jbc).
1.8 V
v
v
Input Signal
CCIO
v
v
2.5 V
v
v
(2)
(4)
pins are connected to a 3.3-V power supply, the output high
CCINT
Note (1)
CCINT
v
3.3 V
v
v
v
(2)
pins must always be connected to a 1.5-V power
level is 1.5 V, then input pins are 1.5-V, 1.8-V, 2.5-V,
CCIO
v
5.0 V
CCIO
(6)
pins can be connected to either a 1.5-V,
and V
v
v
v
1.5 V
v
CCIO
(3)
(5)
(7)
CCINT
supply current will be slightly larger
CCIO
v
v
1.8 V
v
power supplies may be
(5)
(7)
Output Signal
pins are connected to a
v
Preliminary Information
2.5 V
CCIO
v
(7)
Table 17
.
Altera Corporation
3.3 V
v
v
5.0 V
(8)