EP3C5E144C8N Datasheet, PDF (321/348 Pages) Altera Corporation – Ability to disable external JTAG port

Chapter 2: Cyclone III LS Device Data Sheet
2–7
Electrical Characteristics
Table 2–8 lists the percentage change of the OCT resistance with voltage and
temperature.
Table 2–8. Cyclone III LS Devices OCT Variation After Calibration at Device Power-Up ⁽¹⁾
Nominal Voltage
3.0
2.5
1.8
1.5
1.2
dR/dT (%/°C)
0.262
0.234
0.219
0.199
0.161
dR/dV (%/mV)
–0.026
–0.039
–0.086
–0.136
–0.288
Note to Table 2–8:
(1) Use this table to calculate the final OCT resistance with the variation of temperature and voltage.
Equation 2–1. ^{(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 2–1:
(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 percentage change of resistance with temperature.
(10) dR/dV is the percentage change of resistance with voltage.
(11) V₂ is final voltage.
(12) V₁ is the initial voltage.
December 2011 Altera Corporation
Cyclone III Device Handbook
Volume 2