EP2C8T144C8N Datasheet, PDF (329/470 Pages) Altera Corporation – Cyclone II Device Handbook, Volume 1

High-Speed Differential Interfaces in Cyclone II Devices
RSDS I/O Standard Support in Cyclone II Devices
The RSDS specification is used in chip-to-chip applications between the
timing controller and the column drivers on display panels. Cyclone II
devices meet the National Semiconductor Corporation RSDS Interface
Specification and support the RSDS output standard. Table 11–2 shows
the RSDS electrical characteristics for Cyclone II devices.
Table 11–2. RSDS Electrical Characteristics for Cyclone II Devices Note (1)
Symbol
Parameter
Condition
Min
Typ
Max
Unit
V_{C C I O}
V_OD (2)
V_OS (3)
T_r/T_f
Output supply voltage
Differential output voltage
Output offset voltage
Transition time
2.375
2.5
2.625
V
R_L = 100 Ω
100
600
mV
R_L = 100 Ω
1.125
1.25
1.375
V
20% to 80%
500
ps
Notes to Table 11–2:
(1) The specifications apply at the resistor network output.
(2) V_OD = V_OH - V_OL.
(3) V_OS = (V_OH + V_OL) / 2.
Figure 11–6 shows the RSDS transmitter output signal waveforms.
Figure 11–6. Transmitter Output Signal Level Waveforms for RSDS Note (1)
Single-Ended Waveform
V_OS
V_OD
Positive Channel (p) = V_OH
Negative Channel (n) = V_OL
Ground
Differential Waveform (Mathematical Function of Positive & Negative Channel)
V_OD
0V
V_OD
p − n (2)
Notes to Figure 11–6:
(1) The V_OD specifications apply at the resistor network output.
(2) The p – n waveform is a function of the positive channel (p) and the negative channel (n).
Altera Corporation
February 2007
11–7
Cyclone II Device Handbook, Volume 1