2024年2月19日发(作者：佘悠)
DC Characteristics for Different Pin TypesTable5–11 specifies the bus hold parameters for general I/O 5– Hold ParametersNote(1)VCCIO LevelParameterConditions1.8 VMinBus-hold low, sustaining
currentBus-hold high, sustaining
currentBus-hold low, overdrive
currentBus-hold high, overdrive
currentBus-hold trip point (2)Notes to Table5–11:(1)(2)There is no specification for bus-hold at VCCIO = 1.5 V for the HSTL I/O bus-hold trip points are based on calculated input voltages from the JEDEC standard.2.5 VMin50–50——0.73.3 VMin70–70——0.8UnitMax——200–2001.07Max——300–3001.7Max——500–5002.0μAμAμAμAVVIN >
VIL(maximum)VIN <
VIL(minimum)0 V < VIN < VCCIO0 V < VIN < VCCIO—30–30——0.68On-Chip Termination SpecificationsTable5–12 defines the specifications for internal termination resistance
tolerance when using series or differential on-chip 5– On-Chip Termination SpecificationsResistance ToleranceSymbolDescriptionConditionsExtended/Commercial IndustrialAutomotive
MaxMaxTemp Max±30±30±30 (1)±30±30±40±40±40±50Unit%%%25-Ω RS50-Ω RS50-Ω RSInternal series termination without VCCIO = 3.3Vcalibration (25-Ω setting)Internal series termination without VCCIO = 2.5Vcalibration (50-Ω setting)Internal series termination without VCCIO = 1.8Vcalibration (50-Ω setting)Note to Table5–12:(1)For commercial –8 devices, the tolerance is ±40%.Cyclone II Device Handbook, Volume 1
Operating ConditionsFigure5–er Input Waveforms for Differential I/O StandardsSingle-Ended WaveformPositive Channel (p) = VIHVID
(1)VICM
(2)Negative Channel (n) = VILGroundDifferential Waveform (Mathematical Function of Positive and Negative Channel)VID
(1)0 VVID
(1)p − n (3)Notes to Figure5–1:(1)(2)(3)VID is the differential input voltage. VID = |p – n|.VICM is the input common mode voltage. VICM = (p + n)/ p – n waveform is a function of the positive channel (p) and the negative channel (n).Cyclone II Device Handbook, Volume 1
2024年2月19日发(作者：佘悠)
DC Characteristics for Different Pin TypesTable5–11 specifies the bus hold parameters for general I/O 5– Hold ParametersNote(1)VCCIO LevelParameterConditions1.8 VMinBus-hold low, sustaining
currentBus-hold high, sustaining
currentBus-hold low, overdrive
currentBus-hold high, overdrive
currentBus-hold trip point (2)Notes to Table5–11:(1)(2)There is no specification for bus-hold at VCCIO = 1.5 V for the HSTL I/O bus-hold trip points are based on calculated input voltages from the JEDEC standard.2.5 VMin50–50——0.73.3 VMin70–70——0.8UnitMax——200–2001.07Max——300–3001.7Max——500–5002.0μAμAμAμAVVIN >
VIL(maximum)VIN <
VIL(minimum)0 V < VIN < VCCIO0 V < VIN < VCCIO—30–30——0.68On-Chip Termination SpecificationsTable5–12 defines the specifications for internal termination resistance
tolerance when using series or differential on-chip 5– On-Chip Termination SpecificationsResistance ToleranceSymbolDescriptionConditionsExtended/Commercial IndustrialAutomotive
MaxMaxTemp Max±30±30±30 (1)±30±30±40±40±40±50Unit%%%25-Ω RS50-Ω RS50-Ω RSInternal series termination without VCCIO = 3.3Vcalibration (25-Ω setting)Internal series termination without VCCIO = 2.5Vcalibration (50-Ω setting)Internal series termination without VCCIO = 1.8Vcalibration (50-Ω setting)Note to Table5–12:(1)For commercial –8 devices, the tolerance is ±40%.Cyclone II Device Handbook, Volume 1
Operating ConditionsFigure5–er Input Waveforms for Differential I/O StandardsSingle-Ended WaveformPositive Channel (p) = VIHVID
(1)VICM
(2)Negative Channel (n) = VILGroundDifferential Waveform (Mathematical Function of Positive and Negative Channel)VID
(1)0 VVID
(1)p − n (3)Notes to Figure5–1:(1)(2)(3)VID is the differential input voltage. VID = |p – n|.VICM is the input common mode voltage. VICM = (p + n)/ p – n waveform is a function of the positive channel (p) and the negative channel (n).Cyclone II Device Handbook, Volume 1