EP3C5E144C8N Datasheet, PDF (287/348 Pages) Altera Corporation – Ability to disable external JTAG port

Chapter 1: Cyclone III Device Data Sheet
1–7
Electrical Characteristics
The OCT resistance may vary with the variation of temperature and voltage after
calibration at device power-up. Use Table 1–8 and Equation 1–1 to determine the final
OCT resistance considering the variations after calibration at device power-up.
Table 1–8 lists the change percentage of the OCT resistance with voltage and
temperature.
Table 1–8. Cyclone III Devices OCT Variation After Calibration at Device Power-Up
Nominal Voltage
dR/dT (%/°C)
dR/dV (%/mV)
3.0
0.262
–0.026
2.5
0.234
–0.039
1.8
0.219
–0.086
1.5
0.199
–0.136
1.2
0.161
–0.288
Equation 1–1. ^{(1), (2), (3), (4), (5), (6)}
ΔR_V = (V₂ – V₁) × 1000 × dR/dV ⁽⁷⁾
ΔR_T = (T₂ – T₁) × dR/dT ⁽⁸⁾
For ΔR_x < 0; MF_x = 1/ (|ΔR_x|/100 + 1) ⁽⁹⁾
For ΔR_x > 0; MF_x = ΔR_x/100 + 1 ⁽¹⁰⁾
MF = MF_V × MF_T ⁽¹¹⁾
R_final = R_initial × MF ⁽¹²⁾
Notes to Equation 1–1:
(1) T₂ is the final temperature.
(2) T₁ is the initial temperature.
(3) MF is multiplication factor.
(4) R_final is final resistance.
(5) R_initial is initial resistance.
(6) Subscript × refers to both _V and _T.
(7) ΔR_V is variation of resistance with voltage.
(8) ΔR_T is variation of resistance with temperature.
(9) dR/dT is the change percentage of resistance with temperature after calibration at device power-up.
(10) dR/dV is the change percentage of resistance with voltage after calibration at device power-up.
(11) V₂ is final voltage.
(12) V₁ is the initial voltage.
December 2011 Altera Corporation
Cyclone III Device Handbook
Volume 2