HC311 Datasheet, PDF (8/26 Pages) Altera Corporation – HardCopy III Device

1–6
Chapter 1: DC and Switching Characteristics of HardCopy III Devices
Electrical Characteristics
Table 1–6. HardCopy III On-Chip Termination Calibration Accuracy Specifications – Preliminary (Part 2 of 2) (Note 1)
Calibration Accuracy
Symbol
Description
50−Ω RT 1.5
Internal parallel termination with calibration
(50-Ω setting)
50−Ω R_S 1.2
Internal series termination with calibration
(50-Ω setting)
50−Ω R_T 1.2
Internal parallel termination with calibration
(50-Ω setting)
Notes to Table 1–6:
(1) OCT calibration accuracy is valid at the time of calibration only.
(2) Pending silicon characterization.
Conditions
VCCIO = 1.5 V
Commercial (2) Industrial Unit
TBD
—
%
VCCIO = 1.2 V
TBD
—
%
VCCIO = 1.2 V
TBD
—
%
The accuracy listed in Table 1–6 is valid at the time of calibration. If the voltage or
temperature changes, the termination resistance value varies. Table 1–7 lists the
resistance tolerance for HardCopy III on-chip termination.
Table 1–7. On-Chip Termination Resistance Tolerance Specification for I/Os – Preliminary (Note 1)
Resistance Tolerance
Symbol
Description
R_{OCT _ UNC AL}
Internal series termination without calibration
R_{OCT_CAL}
Internal series termination with calibration
Notes to Table 1–7:
(1) Pending silicon characterization.
(2) For resistance tolerance after power-up calibration, refer to Table 1–8.
Commercial Max Industrial Max Unit
TBD
—
%
(2)
—
%
Table 1–8 lists OCT variation with temperature and voltage after power-up
calibration. Use Table 1–8 and Equation 1–1 to determine OCT variation without
re-calibration.
Equation 1–1.
R_OCT
=
R_CA
L
⎛
⎝
1
+
d_----R_--
dT
×
ΔT
+
d_----R_--
dV
×
Δ
V
⎞
⎠
1 Note that R_CAL is calibrated on-chip termination at power-up. ΔT and ΔV are
variations in temperature and voltage (V_CCIO) at power-up.
HardCopy III Device Handbook, Volume 3
© December 2008 Altera Corporation