ep2s130 Altera Corporation, ep2s130 Datasheet - Page 102

• Manufacturer Part Number: ep2s130
• Description: Stratix Ii Device Family Data Sheet
• Manufacturer: Altera Corporation

I/O Structure
2–94
Stratix II Device Handbook, Volume 1
Notes to
(1)
(2)
(3)
(4)
Table 2–18. Stratix II MultiVolt I/O Support
V
CCIO
1.2
1.5
1.8
2.5
3.3
To drive inputs higher than V
and LVCMOS input levels to overdrive input buffer option in the Quartus II software.
The pin current may be slightly higher than the default value. You must verify that the driving device’s V
maximum and V
voltage specifications.
Although V
a different level can still interface with the Stratix II device if it has inputs that tolerate the V
Stratix II devices do not support 1.2-V LVTTL and 1.2-V LVCMOS. Stratix II devices support 1.2-V HSTL.
(V)
Table
2–18:
1.2
(4)
(4)
(4)
(4)
CCIO
(4)
specifies the voltage necessary for the Stratix II device to drive out, a receiving device powered at
O H
v
minimum voltages do not violate the applicable Stratix II V
1.5
v
v
(2)
Input Signal (V)
Table 2–18
The TDO and nCEO pins are powered by V
in. TDO is in I/O bank 4 and nCEO is in I/O bank 7.
Ideally, the V
at the same voltage level. This may not always be possible depending on
the V
configuration voltage level chosen by VCCSEL on slave devices. Master
and slave devices can be in any position in the chain. Master indicates that
it is driving out TDO or nCEO to a slave device.
For multi-device passive configuration schemes, the nCEO pin of the
master device drives the nCE pin of the slave device. The VCCSEL pin on
the slave device selects which input buffer is used for nCE. When VCCSEL
is logic high, it selects the 1.8-V/1.5-V buffer powered by V
VCCSEL is logic low it selects the 3.3-V/2.5-V input buffer powered by
V
device match the VCCSEL settings for the nCE input buffer of the slave
device it is connected to, but that may not be possible depending on the
application.
ensure that nCEO can successfully drive nCE for all power supply
combinations.
CCPD
CCIO
v
1.8
v
v
CCIO
but less than 4.0 V, disable the PCI clamping diode and select the Allow LVTTL
(2)
. The ideal case is to have the V
level of TDO and nCEO pins on master devices and the
summarizes Stratix II MultiVolt I/O support.
Table 2–19
v
v
v
CC
2.5
v
v
(2)
(2)
(2)
supplies for the I/O buffers of any two connected pins are
Note (1)
v
v
v
3.3
v
v
contains board design recommendations to
(2)
(2)
(2)
v
v
v
v
v
1.2
(3)
(3)
(3)
(4)
(3)
CCIO
v
v
v
1.5
v
(3)
(3)
(3)
CCIO
of the nCEO bank in a master
Output Signal (V)
I L
of the bank that they reside
v
v
maximum and V
1.8
v
(3)
(3)
v
CCIO
Altera Corporation
2.5
v
(3)
value.
CCIO
I H
3.3
v
minimum
. When
May 2007
O L
5.0
v