EP2AGX95EF29C6N Datasheet, PDF (179/380 Pages) Altera Corporation – Device Interfaces and Integration

Chapter 6: I/O Features in Arria II Devices
I/O Structure
6–15
Table 6–7. Programmable Current Strength for Arria II GX Devices (Note 1) (Part 2 of 2)
I/O Standard
I_OL / I_OH Current Strength Setting (mA)
for Top, Bottom, and Right I/O Pins
HSTL-12 Class I
12, 10, 8
HSTL-12 Class II
16
BLVDS
8, 12, 16
Notes to Table 6–7:
(1) The default current strength setting in the Quartus II software is 50- R_S OCT without calibration for all
non-voltage reference and HSTL/SSTL Class I I/O standards. The default setting is 25- R_S OCT without calibration
for HSTL/SSTL Class II I/O standards.
(2) The default current strength setting in the Quartus II software is the current strength shown in brackets [].
Table 6–8. Programmable Current Strength for Arria II GZ Devices (Note 1), (2)
I/O Standard
I_OH / I_OL Current Strength
Setting (mA) for
Column I/O Pins
I_OH / I_OL Current Strength
Setting (mA) for
Row I/O Pins
3.3-V LVTTL
16, 12, 8, 4
12, 8, 4
3.3-V LVCMOS
16, 12, 8, 4
8, 4
2.5-V LVCMOS
16, 12, 8, 4
12, 8, 4
1.8-V LVCMOS
12, 10, 8, 6, 4, 2
8, 6, 4, 2
1.5-V LVCMOS
12, 10, 8, 6, 4, 2
8, 6, 4, 2
1.2-V LVCMOS
8, 6, 4, 2
4, 2
SSTL-2 Class I
12, 10, 8
12, 8
SSTL-2 Class II
16
16
SSTL-18 Class I
12, 10, 8, 6, 4
12, 10, 8, 6, 4
SSTL-18 Class II
16, 8
16, 8
SSTL-15 Class I
12, 10, 8, 6, 4
8, 6, 4
SSTL-15 Class II
16, 8
—
HSTL-18 Class I
12, 10, 8, 6, 4
12, 10, 8, 6, 4
HSTL-18 Class II
16
16
HSTL-15 Class I
12, 10, 8, 6, 4
8, 6, 4
HSTL-15 Class II
16
—
HSTL-12 Class I
12, 10, 8, 6, 4
8, 6, 4
HSTL-12 Class II
16
—
Notes to Table 6–8:
(1) The default setting in the Quartus II software is 50- R_S OCT without calibration for all non-voltage reference and
HSTL and SSTL Class I I/O standards. The default setting is 25- R_S OCT without calibration for HSTL and SSTL
Class II I/O standards.
(2) The 3.3-V LVTTL and 3.3-V LVCMOS are supported using V_CCIO and V_CCPD at 3.0 V.
1 Altera recommends performing IBIS or SPICE simulations to determine the right
current strength setting for your specific application.
December 2011 Altera Corporation
Arria II Device Handbook Volume 1: Device Interfaces and Integration