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    • 47. 发明授权
    • Input/output circuit with user programmable functions
    • 具有用户可编程功能的输入/输出电路
    • US06870397B1
    • 2005-03-22
    • US10635992
    • 2003-08-06
    • Brian FoxAndreas PapalioliosSteven P. WinegardenEdmond Y. Cheung
    • Brian FoxAndreas PapalioliosSteven P. WinegardenEdmond Y. Cheung
    • H03K19/177H03K19/77
    • H03K19/17744
    • The I/O circuit of the present invention provides optimal flexibility and performance using a number of different structures and methods. The present invention provides a signal follower circuit for an input pad. In one embodiment, the output buffer is capable of injecting a constant onto a pad during reconfiguration of a configurable system logic circuit. The present invention also provides a circuit for generating a programmable data propagation delay, thereby guaranteeing zero hold time for an arbitrary input register. Zero hold time is accomplished by allowing the user to optimally characterize clock delay to a given input/output circuit. The present invention also provides fast switching between input pads, thereby minimizing data propagation delay between the input pads. Additionally, the present invention reduces time spent in production product test by facilitating the testing of multiple routes with one test configuration. A circuit expanding the number of data input channels available to system routing is provided. Lastly, a plurality of identical input/output block tiles (IOBTs) is disclosed, thereby enabling each I/O circuit to provide the same signals regardless of the IOBTs location in the I/O circuit.
    • 本发明的I / O电路使用多种不同的结构和方法提供最佳的灵活性和性能。 本发明提供一种用于输入焊盘的信号跟随器电路。 在一个实施例中,输出缓冲器能够在配置的系统逻辑电路的重新配置期间将常数注入焊盘。 本发明还提供了一种用于产生可编程数据传播延迟的电路,由此保证任意输入寄存器的零保持时间。 零保持时间通过允许用户最佳地表征给定输入/输出电路的时钟延迟来实现。 本发明还提供了输入焊盘之间的快速切换,从而使输入焊盘之间的数据传播延迟最小化。 此外,本发明通过促进对具有一个测试配置的多个路由的测试来减少在生产产品测试中花费的时间。 提供了扩展系统路由可用数据输入通道数量的电路。 最后,公开了多个相同的输入/输出块块(IOBT),从而使每个I / O电路能够提供相同的信号,而不管I / O电路中的IOBT位置如何。
    • 49. 发明授权
    • Configuration in a configurable system on a chip
    • 配置在芯片上的可配置系统中
    • US06851047B1
    • 2005-02-01
    • US09419386
    • 1999-10-15
    • Brian FoxAndreas Papaliolios
    • Brian FoxAndreas Papaliolios
    • G06F13/14G06F13/28G06F15/177H03K19/177
    • G06F13/14
    • The present invention allows a user to customize the configuration sequence of a configurable system on a chip (CSoC), thereby adding considerable flexibility to the configuration process. The present invention also provides certain features, transparent to the user, which optimize system resources and ensure the correct initialization of the CSoC. The CSoC leverages an on-chip central processing unit (CPU) to control the configuration process of the configurable system logic (CSL). Advantageously, the CSL configuration memory cells as well as other programmable locations in the CSoC are addressable as part of a system bus address space. The system bus is a multi-use structure that can be used for both configuring and reading of memory cells. In this manner, the CSoC optimizes system resources.
    • 本发明允许用户定制芯片(CSoC)上可配置系统的配置顺序,从而为配置过程增加了相当大的灵活性。 本发明还提供对用户透明的某些特征,其优化系统资源并确保CSoC的正确初始化。 CSoC利用片上中央处理单元(CPU)来控制可配置系统逻辑(CSL)的配置过程。 有利地,CSL配置存储器单元以及CSoC中的其他可编程位置作为系统总线地址空间的一部分可寻址。 系统总线是一种多用途结构,可用于配置和读取存储单元。 以这种方式,CSoC优化系统资源。