Altera GPIO Megafunction IP Core技术指南

需积分: 10 122 浏览量更新于2024-07-22 收藏 445KB PDF 举报

"这是一份Altera公司的GPIO (General Purpose Input/Output) Megafunction用户指南，主要面向FPGA开发工程师，介绍了Altera GPIO IP核的功能和特性。" Altera GPIO Megafunction是Altera公司为FPGA设计提供的一个关键组件，主要用于实现通用I/O功能，这些I/O接口不特定于收发器、内存接口或LVDS（低压差分信号）应用。该IP核具有以下关键组件： 1. **双数据速率输入/输出(DDIO)**：DDIO是一种数字组件，它能够将通信通道的数据速率加倍或减半。这对于在高速系统中保持信号完整性以及满足时序约束至关重要。不同FPGA家族的DDIO实现和特性可能会有所不同。 2. **延迟链**：延迟链可以被配置来执行特定的延迟操作，有助于解决I/O的时序关闭问题。这对于精确控制信号传输的时间和同步是必要的。 3. **I/O缓冲器**：I/O缓冲器负责连接FPGA内部逻辑与外部引脚，确保信号在进入或离开FPGA时的驱动能力和接收能力符合需求。缓冲器的特性也因FPGA系列而异。请注意，Altera GPIO IP核仅适用于Arria 10系列的器件。对于Arria V、Cyclone V和Stratix V设备，开发者需要参考“IP Migration for Arria V, Cyclone V, and Stratix V”进行IP核的迁移步骤。与Altera GPIO相关的其他信息和参考资料包括： - **Double Data Rate I/O (ALTDDIO_IN, ALTDDIO_OUT, and ALTDDIO_BIDIR) Megafunctions User Guide**：这可能是关于如何使用双数据速率I/O功能的详细指南，涵盖了输入、输出和双向操作的Megafunction。 - **I/O Buffer (ALTIOBUF) Megafunction User Guide**：此文档将深入讲解如何使用I/O缓冲器Megafunction，帮助用户理解和配置I/O缓冲器以满足其设计需求。对于那些热衷于FPGA开发的工程师来说，这份文档不仅提供了GPIO的基础知识，还可能包含如何优化和利用这些高级特性的实践指导，对提升设计效率和系统性能大有裨益。

When you set the Register mode option to Simple register, the full-rate DDIO works as a simple

Note:

When you set the Register mode option to Simple register, the Fitter chooses whether to pack the

offs.

Note:

Use the input path in four modes:

• Bypass—data goes from the delay element to the core, bypassing all DDIOs.

• Packed Register—the full-rate DDIO operates as a register, bypassing half-rate DDIOs.

• Double data rate Input/Output (DDIO) mode with full-rate conversion—The full-rate DDIO operates

as a regular DDIO, bypassing half-rate DDIOs.

• DDIO mode with half-rate conversion—The full-rate DDIO operates as a regular DDIO. Half-rate DDIOs

converts data for full-rate to half-rate.

All DDIOs share the same asynchronous clear and preset signals when used. Half-rate and full-rate DDIOs

connect to separate clocks. When you use half-rate and full-rate DDIOs, the full-rate clock must run at twice

the half-rate frequency. Use different phase relationships to meet timing requirements.

Input Path Waveform

The following figure shows the waveforms for an input path in DDIO mode with half-rate conversion. This

configuration uses all the blocks and refers to the same labels shown in Figure 2.

The actual timing relationship between different signals may vary depending on the specific design,

delays, and phases that you choose for the full-rate and half-rate clocks.

Note:

Figure 3: Input Path Waveform

Altera Corporation

Altera GPIO Megafunction User Guide

Send Feedback

Input Path Waveform

ug-altera_gpio

2014.08.18

剩余20页未读，继续阅读

拜仁辉煌

粉丝: 0
资源: 2

Altera GPIO Megafunction IP Core技术指南

Altera EP1C12 EP1C3 电路原理图压缩包解析

Altera FPGA配置指南

Altera ACEX1K FPGA器件：EP1K50数据手册

Altera_FPGA.rar_Altera FPGA_altera fpga_altera学习

Altera-Cyclone-III.rar_Altera Cyclone_altera cyclone iii_altera

altera lic

altera 软件

altera stratix

cordic altera

altera 选型

最新资源