参数资料
型号: DK-DEV-4CGX150N
厂商: Altera
文件页数: 33/42页
文件大小: 0K
描述: KIT DEVELOPMENT CYCLONE IV GX
应用说明: Cyclone IV Design Guidelines
产品培训模块: Three Reasons to Use FPGA's in Industrial Designs
Cyclone IV FPGA Family Overview
软件下载: DK-DEV-4CGX150N Kit Install
特色产品: Cyclone? IV GX FPGA Development Kit
标准包装: 1
系列: CYCLONE® IV GX
类型: FPGA
适用于相关产品: Cyclone IV GX
所含物品: 板,线缆,文档,电源
其它名称: 544-2713
Chapter 1: Cyclone IV Device Datasheet
1–39
Glossary
December 2013
Altera Corporation
R
RL
Receiver differential input discrete resistor (external to Cyclone IV devices).
Receiver Input
Waveform
Receiver input waveform for LVDS and LVPECL differential standards:
Receiver input
skew margin
(RSKM)
High-speed I/O block: The total margin left after accounting for the sampling window and TCCS.
RSKM = (TUI – SW – TCCS) / 2.
S
Single-ended
voltage-
referenced I/O
Standard
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.
SW (Sampling
Window)
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.
Table 1–46. Glossary (Part 3 of 5)
Letter
Term
Definitions
Single-Ended Waveform
Differential Waveform (Mathematical Function of Positive & Negative Channel)
Positive Channel (p) = V
IH
Negative Channel (n) = V
IL
Ground
V
ID
V
ID
0 V
V
CM
p
- n
V
ID
VIH(AC)
VIH(DC)
VREF
VIL(DC)
VIL(AC)
VOH
VOL
VCCIO
VSS
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