ep2c35 Altera Corporation, ep2c35 Datasheet - Page 62

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

I/O Structure & Features
2–50
Cyclone II Device Handbook, Volume 1
Open-Drain Output
Cyclone II devices provide an optional open-drain (equivalent to an
open-collector) output for each I/O pin. This open-drain output enables
the device to provide system-level control signals (that is, interrupt and
write-enable signals) that can be asserted by any of several devices.
Note to
(1)
LVCMOS (1.5 V)
SSTL-2 class I
SSTL-2 class II
SSTL-18 class I
SSTL-18 class II
HSTL-18 class I
HSTL-18 class II
HSTL-15 class I
HSTL-15 class II
Table 2–16. Programmable Drive Strength (Part 2 of 2)
The default current in the Quartus II software is the maximum setting for each
I/O standard.
I/O Standard
Table
2–16:
Top & Bottom I/O Pins
I
OH
/I
12
16
20
24
10
12
16
18
10
12
16
18
20
10
12
16
OL
2
4
6
8
8
6
8
8
8
Current Strength Setting (mA)
Altera Corporation
Side I/O Pins
Note (1)
February 2007
12
16
10
10
12
2
4
6
8
6
8
8
8