EP3C5E144C8N Datasheet, PDF (345/348 Pages) Altera Corporation – Ability to disable external JTAG port

Chapter 2: Cyclone III LS Device Data Sheet
Glossary
2–31
Table 2–39. Glossary (Part 6 of 6)
Letter
Term
V_CM(DC)
V_DIF(AC)
V_DIF(DC)
V_ICM
V_ID
V_IH
V_IH(AC)
V_IH(DC)
V_IL
V_{IL (AC)}
V_{IL (DC)}
V_IN
V_OCM
V
V_OD
V_OH
V_OL
V_OS
V_{OX (AC)}
V_REF
V_{REF (AC)}
V_{REF (DC)}
V_{SWING (AC)}
V_{SWING (DC)}
V_TT
V_{X (AC)}
W
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X
—
Y
—
Z
—
Definitions
DC common mode input voltage.
AC differential Input Voltage—The minimum AC input differential voltage required for
switching.
DC differential Input Voltage—The minimum DC input differential voltage required for
switching.
Input Common Mode Voltage—The common mode of the differential signal at the receiver.
Input differential Voltage Swing—The difference in voltage between the positive and
complementary conductors of a differential transmission at the receiver.
Voltage Input High—The minimum positive voltage applied to the input that is accepted by
the device as a logic high.
High-level AC input voltage.
High-level DC input voltage.
Voltage Input Low—The maximum positive voltage applied to the input that is accepted by
the device as a logic low.
Low-level AC input voltage.
Low-level DC input voltage.
DC input voltage.
Output Common Mode Voltage—The common mode of the differential signal at the
transmitter.
Output differential Voltage Swing—The difference in voltage between the positive and
complementary conductors of a differential transmission at the transmitter. V_OD = V_OH – V_OL.
Voltage Output High—The maximum positive voltage from an output that the device
considers will be accepted as the minimum positive high level.
Voltage Output Low—The maximum positive voltage from an output that the device considers
will be accepted as the maximum positive low level.
Output offset voltage—V_OS = (V_OH + V_OL) / 2.
AC differential Output cross point voltage—The voltage at which the differential output signals
must cross.
Reference voltage for the SSTL and HSTL I/O standards.
AC input reference voltage for the SSTL and HSTL I/O standards. V_REF(AC) = V_REF(DC) + noise.
The peak-to-peak AC noise on V_REF must not exceed 2% of V_REF(DC).
DC input reference voltage for the SSTL and HSTL I/O standards.
AC differential Input Voltage—AC Input differential voltage required for switching. Refer to
Input Waveforms for the SSTL Differential I/O Standard.
DC differential Input Voltage—DC Input differential voltage required for switching. Refer to
Input Waveforms for the SSTL Differential I/O Standard.
Termination voltage for the SSTL and HSTL I/O standards.
AC differential Input cross point Voltage—The voltage at which the differential input signals
must cross.
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December 2011 Altera Corporation
Cyclone III Device Handbook
Volume 2