P0037 Terasic Technologies Inc, P0037 Datasheet - Page 29

• Manufacturer Part Number: P0037
• Description: BOARD DEV/EDUCATION ALTERA DE0
• Manufacturer: Terasic Technologies Inc
• Type: FPGAr

Specifications of P0037

• Contents: Board, Cable, CD, Power Supply
• For Use With/related Products: Cyclone III
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Chapter 1: Cyclone III Device Data Sheet
Glossary
Table 1–39. Glossary (Part 3 of 5)
© January 2010 Altera Corporation
Letter
R
S
R
Receiver Input
Waveform
RSKM (Receiver
input skew
margin)
Single-ended
Voltage
referenced I/O
Standard
SW (Sampling
Window)
L
Term
Receiver differential input discrete resistor (external to Cyclone III devices).
Receiver Input Waveform for LVDS and LVPECL Differential Standards.
HIGH-SPEED I/O Block: The total margin left after accounting for the sampling window and TCCS.
RSKM = (TUI – SW – TCCS) / 2.
The JEDEC standard for SSTl and HSTL I/O standards defines both the AC and DC input signal
values. The AC values indicate the voltage levels at which the receiver must meet its timing
specifications. The DC values indicate the voltage levels at which the final logic state of the
receiver is unambiguously defined. After the receiver input crosses the AC value, the receiver
changes to the new logic state. The new logic state is then maintained as long as the input stays
beyond the DC threshold. This approach is intended to provide predictable receiver timing in the
presence of input waveform ringing.
HIGH-SPEED I/O Block: The period of time during which the data must be valid to capture it
correctly. The setup and hold times determine the ideal strobe position in the sampling window.
Single-Ended Waveform
Differential Waveform (Mathematical Function of Positive & Negative Channel)
V
V
OH
OL
V
CM
V
ID
V
ID
Definitions
V
REF
Cyclone III Device Handbook, Volume 2
V
ID
Positive Channel (p) = V
Negative Channel (n) = V
Ground
0 V
p - n
V
V
IH(DC)
IL(DC)
V
V
IH ( AC )
IL(AC )
V
CCIO
V
IH
IL
SS
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