ep2s130 Altera Corporation, ep2s130 Datasheet - Page 88

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

I/O Structure
Figure 2–54. Stratix II IOE in DDR Output I/O Configuration
Notes to
(1)
(2)
(3)
2–80
Stratix II Device Handbook, Volume 1
Column, Row,
Interconnect
or Local
All input signals to the IOE can be inverted at the IOE.
The tri-state buffer is active low. The DDIO megafunction represents the tri-state buffer as active-high with an
inverter at the OE register data port. Similarly, the aclr and apreset signals are also active-high at the input ports
of the DDIO megafunction.
The optional PCI clamp is only available on column I/O pins.
ioe_clk[7..0]
Figure
2–54:
clkout
aclr/apreset
sclr/spreset
ce_out
oe
Chip-Wide Reset
Output Register
Output Register
OE Register
OE Register
ENA
D
CLRN/PRN
D
CLRN/PRN
D
CLRN/PRN
D
CLRN/PRN
ENA
ENA
ENA
Q
Q
Q
Q
Notes
Used for
DDR, DDR2
SDRAM
clk
Open-Drain Output
(1),
Drive Strength
Pin Delay
(2)
Output
Control
OE Register
t CO Delay
V CCIO
V CCIO
Altera Corporation
PCI Clamp (3)
Termination
On-Chip
Bus-Hold
Circuit
Programmable
Pull-Up
Resistor
May 2007