HC210 datasheet(206/228 Pages) ALTERA

206 / 228 page

8–18

Altera Corporation

September 2008

HardCopy Series Handbook, Volume 1

On-Chip Series Termination

Stratix II and HardCopy II devices support I/O driver on-chip series

termination (RS) through drive-strength control for single-ended I/O

standards. There are two ways to implement the RS in Stratix II and

Hardcopy II devices:

■

RS without calibration for both row and column I/O pins

■

RS with calibration only for column I/O pins

On-Chip Series Termination without Calibration

HardCopy II devices support output-driver impedance matching to

closely match the impedance of the transmission line. If you select

matching impedance, you cannot select programmable-current drive

strength. Table 8–12 lists the HardCopy II HC230 and HC240 output

standards that support on-chip series termination without calibration.

Table 8–12. HC230 and HC240 Selectable I/O Drivers with On-Chip Series

Termination without Calibration

Note (1)

I/O Standard

Column I/O Pins

Row I/O Pins

3.3-V LVTTL

25 or 50

3.3-V LVCMOS

25 or 50

2.5-V LVTTL

25 or 50

2.5-V LVCMOS

25 or 50

1.8-V LVTTL

25 or 50

1.8-V LVCMOS

25 or 50

1.5-V LVTTL

1.5-V LVCMOS

2.5-V SSTL class I

(2)

2.5-V SSTL class II

(2)

1.8-V SSTL class I

(2)

1.8-V SSTL class II

1.8-V HSTL class I

(2)

1.8-V HSTL class II

1.5-V HSTL class I

(3)

Notes to Table 8–12:

(1)

These numbers are preliminary and pending silicon characterization.

(2)

HardCopy II HC230 and HC240 devices do not support on-chip series

termination with this I/O standard on these pins.

(3)

Support pending HardCopy II characterization.

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