HC210 datasheet(205/228 Pages) ALTERA

205 / 228 page

Altera Corporation

8–17

September 2008

Preliminary

On-Chip Termination

Similarly, when using HardCopy II HC230 and HC240 devices as

companion devices, you must restrict the I/O drive settings, as shown in

Table 8–11.

On-Chip

Termination

Like Stratix II devices, HardCopy II devices feature on-chip termination

(OCT) to provide I/O impedance matching and termination capabilities.

To maintain compatibility with Stratix II prototype devices, HardCopy II

devices support on-chip series termination (RS) for single-ended I/O

standards and on-chip differential termination (RD) for differential I/O

standards. However, some HardCopy II pins do not support the on-chip

termination that may be available on the same Stratix II pin. This section

highlights the termination schemes that HardCopy II devices support.

Table 8–11. HC230 and HC240 Device Programmable Drive Strengths

I/O Standard

IOH and IOL Current

Strength Setting (mA) for

Column I/O Pins

IOH and IOL Current

Strength Setting (mA) for

Row I/O Pins

3.3-V LVTTL

24, 20, 16, 12, 8, 4 (1)

12, 8, 4

3.3-V LVCMOS

24, 20, 16, 12, 8, 4 (1)

8, 4

2.5-V LVTTL/LVCMOS

16, 12, 8, 4

12, 8, 4

1.8-V LVTTL/LVCMOS

12, 10, 8, 6, 4, 2

8, 6, 4, 2

1.5-V LVCMOS

8, 6, 4, 2

4, 2

SSTL-2 class I

12, 8

(2)

SSTL-2 class II

24, 20, 16

(2)

SSTL-18 class I

12, 10, 8, 6, 4

(2)

SSTL-18 class II

20, 18, 16, 8

HSTL-18 class I

12, 10, 8, 6, 4

HSTL-18 class II

20, 18, 16

HSTL-15 class I

12, 10, 8, 6, 4

HSTL-15 class II

20, 18, 16

Notes to Table 8–11:

(1)

HardCopy II devices do not support some of the settings available in the Stratix II

prototype device. For more information, refer to the Stratix II Device Family Data

Sheet in volume 1 of the Stratix II Device Handbook.

(2)

Row I/O pins do not support SSTL I/O standards.

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