公开(公告)号：US07330051B1

公开(公告)日：2008-02-12

申请号：US11354766

申请日：2006-02-14

申请人： Joseph Huang ,  Chiakang Sung ,  Michael H. M. Chu ,  Yan Chong

发明人： Joseph Huang ,  Chiakang Sung ,  Michael H. M. Chu ,  Yan Chong

IPC分类号： H03K19/173

CPC分类号： H03K19/17744

摘要： The amount of simultaneous switching noise generated through the operation of a programmable device can be reduced by reducing the number of pins switching at the same time. An I/O bank can include a number of I/O pin subsets, or DQS groups, each programmed to switch at a different time so that the switching times of the various pins can be staggered for each system clock cycle. Programmable delay elements can be used to control the delay of each subset. The programmable elements can be placed between the system clock and the output registers in order to delay the receiving of the clock signal by the registers and therefore delaying the switching of the output buffers. The programmable delay elements also can be placed between the output registers and the output buffers in order to delay the receiving of the output data by, and subsequent switching of, the output buffers.

摘要翻译： 通过可编程器件的操作产生的同时开关噪声的量可以通过减少引脚数目同时减少。 I / O bank可以包括多个I / O引脚子集或DQS组，每组都被编程为在不同的时间切换，使得各个引脚的切换时间可以在每个系统时钟周期内交错。 可编程延迟元件可用于控制每个子集的延迟。 可编程元件可以放置在系统时钟和输出寄存器之间，以便延迟寄存器对时钟信号的接收，从而延迟输出缓冲器的切换。 可编程延迟元件也可以放置在输出寄存器和输出缓冲器之间，以便延迟输出缓冲器的输出数据的接收和随后的切换。

公开(公告)号：US07492185B1

公开(公告)日：2009-02-17

申请号：US11956182

申请日：2007-12-13

申请人： Joseph Huang ,  Chiakang Sung ,  Michael H. M. Chu ,  Yan Chong

发明人： Joseph Huang ,  Chiakang Sung ,  Michael H. M. Chu ,  Yan Chong

IPC分类号： H03K19/173

CPC分类号： H03K19/17744

摘要： The amount of simultaneous switching noise generated through the operation of a programmable device can be reduced by reducing the number of pins switching at the same time. An I/O bank can include a number of I/O pin subsets, or DQS groups, each programmed to switch at a different time so that the switching times of the various pins can be staggered for each system clock cycle. Programmable delay elements can be used to control the delay of each subset. The programmable elements can be placed between the system clock and the output registers in order to delay the receiving of the clock signal by the registers and therefore delaying the switching of the output buffers. The programmable delay elements also can be placed between the output registers and the output buffers in order to delay the receiving of the output data by, and subsequent switching of, the output buffers.

摘要翻译： 通过可编程器件的操作产生的同时开关噪声的量可以通过减少引脚数目同时减少。 I / O bank可以包括多个I / O引脚子集或DQS组，每组都被编程为在不同的时间切换，使得各个引脚的切换时间可以在每个系统时钟周期内交错。 可编程延迟元件可用于控制每个子集的延迟。 可编程元件可以放置在系统时钟和输出寄存器之间，以便延迟寄存器对时钟信号的接收，从而延迟输出缓冲器的切换。 可编程延迟元件也可以放置在输出寄存器和输出缓冲器之间，以便延迟输出缓冲器的输出数据的接收和随后的切换。

公开(公告)号：US07593273B2

公开(公告)日：2009-09-22

申请号：US11935310

申请日：2007-11-05

申请人： Michael H. M. Chu ,  Joseph Huang ,  Chiakang Sung ,  Yan Chong ,  Andrew Bellis ,  Philip Clarke ,  Manoj B. Roge

发明人： Michael H. M. Chu ,  Joseph Huang ,  Chiakang Sung ,  Yan Chong ,  Andrew Bellis ,  Philip Clarke ,  Manoj B. Roge

IPC分类号： G11C7/10

CPC分类号： G11C7/1051 ,  G11C7/1066 ,  G11C7/1078 ,  G11C7/1093 ,  H03L7/06 ,  H03L7/0812

摘要： Circuits, methods, and apparatus for transferring data from a device's input clock domain to a core clock domain. One example achieves this by using a retiming element between input and core circuits. The retiming element is calibrated by incrementally sweeping a delay and receiving data at each increment. Minimum and maximum delays where data is received without errors are averaged. This average can then be used to adjust the timing of a circuit element inserted in an input path between an input register clocked by an input strobe signal and an output register clocked by a core clock signal. In one example, an input signal may be delayed by an amount corresponding to the delay setting. In other examples, each input signal is registered using an intermediate register between the input register and the output register, where a clock signal is delayed by an amount corresponding to the delay setting.

摘要翻译： 用于将数据从设备的输入时钟域传送到核心时钟域的电路，方法和装置。 一个例子是通过在输入和电路之间使用重新定时元件实现这一点。 重新定时元素通过逐渐扫描延迟并在每个增量处接收数据进行校准。 平均接收无差错数据的最小和最大延迟。 然后可以使用该平均值来调整插入由输入选通信号计时的输入寄存器和由核心时钟信号计时的输出寄存器之间的输入路径中的电路元件的定时。 在一个示例中，输入信号可以被延迟与延迟设置相对应的量。 在其他示例中，使用输入寄存器和输出寄存器之间的中间寄存器来注册每个输入信号，其中时钟信号被延迟与延迟设置相对应的量。

公开(公告)号：US07589556B1

公开(公告)日：2009-09-15

申请号：US11925717

申请日：2007-10-26

申请人： Johnson Tan ,  Andrew Bellis ,  Philip Clarke ,  Yan Chong ,  Joseph Huang ,  Michael H. M. Chu ,  Chiakang Sung

发明人： Johnson Tan ,  Andrew Bellis ,  Philip Clarke ,  Yan Chong ,  Joseph Huang ,  Michael H. M. Chu ,  Chiakang Sung

IPC分类号： G06F7/38

CPC分类号： H03M9/00 ,  H03K5/131 ,  H03K5/133 ,  H03K5/135 ,  H03K2005/00058

摘要： Circuits, methods, and apparatus for the dynamic control of calibration data that adjusts the timing of input and output signals on an integrated circuit. This dynamic control allows input and output circuits to self-calibrate by compensating for temperature and voltage changes in an efficient manner, without the need for device reconfiguration. Calibration settings can be maintained while new calibration settings are loaded. Skew between clock and data signals, as well as among multiple data signals, can be reduced. Dynamic control is achieved while consuming only a minimal resources including route paths.

摘要翻译： 用于动态控制校准数据的电路，方法和装置，用于调整集成电路上的输入和输出信号的时序。 该动态控制允许输入和输出电路通过以有效的方式补偿温度和电压变化而进行自校准，而不需要对器件重新配置。 加载新的校准设置时，可以保持校准设置。 可以减少时钟和数据信号之间以及多个数据信号之间的偏移。 实现动态控制，同时仅消耗包括路由路径在内的最小资源。

公开(公告)号：US08671303B2

公开(公告)日：2014-03-11

申请号：US13349228

申请日：2012-01-12

申请人： Yan Chong ,  Bonnie I. Wang ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

发明人： Yan Chong ,  Bonnie I. Wang ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

IPC分类号： G11C8/00

CPC分类号： G11C7/22 ,  G11C7/1066 ,  G11C7/222

摘要： Circuits, methods, and apparatus for memory interfaces that compensate for skew between a clock signal and DQ/DQS signals that may be caused by a fly-by routing topology. The skew is compensated by clocking the DQ/DQS signals with a phase delayed clock signal, where the phase delay has been calibrated. In one example calibration routine, a clock signal is provided to a receiving device. A DQ/DQS signal is also provided and the timing of their reception compared. A delay of the DQ/DQS signal is changed incrementally until the DQ/DQS signal is aligned with the clock signal at the receiving device. This delay is then used during device operation to delay a signal that clocks registers providing the DQ/DQS signals. Each DQ/DQS group can be aligned to the clock, or the DQS and DQ signals in a group may be independently aligned to the clock at the receiving device.

摘要翻译： 用于存储器接口的电路，方法和装置，其补偿可能由飞越路由拓扑引起的时钟信号和DQ / DQS信号之间的偏差。 通过使用相位延迟时钟信号对DQ / DQS信号进行时钟补偿，其中相位延迟已校准。 在一个示例性校准例程中，向接收设备提供时钟信号。 还提供了DQ / DQS信号，并将其接收的定时进行比较。 DQ / DQS信号的延迟逐渐改变，直到DQ / DQS信号与接收设备的时钟信号对齐。 然后在器件操作期间使用该延迟来延迟提供DQ / DQS信号的寄存器的信号。 每个DQ / DQS组可以与时钟对齐，或者组中的DQS和DQ信号可以独立地对准接收器件上的时钟。

公开(公告)号：US08122275B2

公开(公告)日：2012-02-21

申请号：US11843123

申请日：2007-08-22

申请人： Yan Chong ,  Bonnie I. Wang ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

发明人： Yan Chong ,  Bonnie I. Wang ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

IPC分类号： G11C8/00

CPC分类号： G11C7/22 ,  G11C7/1066 ,  G11C7/222

摘要： Circuits, methods, and apparatus for memory interfaces that compensate for skew between a clock signal and DQ/DQS signals that may be caused by a fly-by routing topology. The skew is compensated by clocking the DQ/DQS signals with a phase delayed clock signal, where the phase delay has been calibrated. In one example calibration routine, a clock signal is provided to a receiving device. A DQ/DQS signal is also provided and the timing of their reception compared. A delay of the DQ/DQS signal is changed incrementally until the DQ/DQS signal is aligned with the clock signal at the receiving device. This delay is then used during device operation to delay a signal that clocks registers providing the DQ/DQS signals. Each DQ/DQS group can be aligned to the clock, or the DQS and DQ signals in a group may be independently aligned to the clock at the receiving device.

摘要翻译： 用于存储器接口的电路，方法和装置，其补偿可能由飞越路由拓扑引起的时钟信号和DQ / DQS信号之间的偏差。 通过使用相位延迟时钟信号对DQ / DQS信号进行时钟补偿，其中相位延迟已校准。 在一个示例性校准例程中，向接收设备提供时钟信号。 还提供了DQ / DQS信号，并将其接收的定时进行比较。 DQ / DQS信号的延迟逐渐改变，直到DQ / DQS信号与接收设备的时钟信号对齐。 然后在器件操作期间使用该延迟来延迟提供DQ / DQS信号的寄存器的信号。 每个DQ / DQS组可以与时钟对齐，或者组中的DQS和DQ信号可以独立地对准接收器件上的时钟。

公开(公告)号：US07990786B2

公开(公告)日：2011-08-02

申请号：US12539582

申请日：2009-08-11

申请人： Michael H. M. Chu ,  Joseph Huang ,  Chiakang Sung ,  Yan Chong ,  Andrew Bellis ,  Philip Clarke ,  Manoj B. Roge

发明人： Michael H. M. Chu ,  Joseph Huang ,  Chiakang Sung ,  Yan Chong ,  Andrew Bellis ,  Philip Clarke ,  Manoj B. Roge

IPC分类号： G11C7/10

CPC分类号： G11C7/1051 ,  G11C7/1066 ,  G11C7/1078 ,  G11C7/1093 ,  H03L7/06 ,  H03L7/0812

摘要： Circuits, methods, and apparatus for transferring data from a device's input clock domain to a core clock domain. One example achieves this by using a retiming element between input and core circuits. The retiming element is calibrated by incrementally sweeping a delay and receiving data at each increment. Minimum and maximum delays where data is received without errors are averaged. This average can then be used to adjust the timing of a circuit element inserted in an input path between an input register clocked by an input strobe signal and an output register clocked by a core clock signal. In one example, an input signal may be delayed by an amount corresponding to the delay setting. In other examples, each input signal is registered using an intermediate register between the input register and the output register, where a clock signal is delayed by an amount corresponding to the delay setting.

摘要翻译： 用于将数据从设备的输入时钟域传送到核心时钟域的电路，方法和装置。 一个例子是通过在输入和电路之间使用重新定时元件实现这一点。 重新定时元素通过逐渐扫描延迟并在每个增量处接收数据进行校准。 平均接收无差错数据的最小和最大延迟。 然后可以使用该平均值来调整插入由输入选通信号计时的输入寄存器和由核心时钟信号计时的输出寄存器之间的输入路径中的电路元件的定时。 在一个示例中，输入信号可以被延迟与延迟设置相对应的量。 在其他示例中，使用输入寄存器和输出寄存器之间的中间寄存器来注册每个输入信号，其中时钟信号被延迟与延迟设置相对应的量。

公开(公告)号：US07706996B2

公开(公告)日：2010-04-27

申请号：US11735394

申请日：2007-04-13

申请人： Yan Chong ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

发明人： Yan Chong ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

IPC分类号： G06F11/00 ,  G06F19/00

CPC分类号： G06F13/4213

摘要： Circuits, methods and apparatus are provided to reduce skew among signals being provided or transmitted by a data interface. Signal path delays are varied such that signals transmitted by a memory interface are calibrated or aligned with each other along a rising and/or falling edge. For example, self-calibration, external circuitry, or design tools can provide skew adjustment of each output channel by determining one or more delays for each output channel path. When aligning multiple edges, the edges of the output signals may be aligned independently, e.g., using edge specific delay elements.

摘要翻译： 提供电路，方法和装置以减少由数据接口提供或发送的信号之间的偏差。 信号路径延迟是变化的，使得由存储器接口发送的信号沿着上升沿和/或下降沿彼此校准或对齐。 例如，自校准，外部电路或设计工具可以通过确定每个输出通道路径的一个或多个延迟来提供每个输出通道的偏移调整。 当对准多个边缘时，输出信号的边缘可以独立对准，例如使用边缘特定的延迟元件。

公开(公告)号：US07509223B2

公开(公告)日：2009-03-24

申请号：US11735386

申请日：2007-04-13

申请人： Yan Chong ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

发明人： Yan Chong ,  Chiakang Sung ,  Joseph Huang ,  Michael H. M. Chu

IPC分类号： G06F3/00

CPC分类号： G01R31/31922 ,  G01R31/3191 ,  G01R31/31937 ,  H04L7/0008 ,  H04L7/0041

摘要： Circuits, methods and apparatus are provided to reduce skew among signals being received by a data interface. Signal path delays are varied such that data and strobe signals received at a memory interface are calibrated or aligned with each other along a rising and/or falling edge. For example, self-calibration circuitry provides skew adjustment of each data signal path by determining one or more delays in each data signal path and strobe signal path based on relative timings of test signals. The rising or falling edges may be used for this alignment.

摘要翻译： 提供电路，方法和装置以减少由数据接口接收的信号之间的偏差。 变化信号路径延迟使得在存储器接口处接收的数据和选通信号沿着上升沿和/或下降沿彼此校准或对齐。 例如，自校准电路通过基于测试信号的相对定时确定每个数据信号路径和选通信号路径中的一个或多个延迟来提供每个数据信号路径的偏移调整。 上升或下降沿可用于此对齐。

公开(公告)号：US07876630B1

公开(公告)日：2011-01-25

申请号：US11935405

申请日：2007-11-06

申请人： Philip Clarke ,  Andrew Bellis ,  Yan Chong ,  Joseph Huang ,  Michael H. M. Chu

发明人： Philip Clarke ,  Andrew Bellis ,  Yan Chong ,  Joseph Huang ,  Michael H. M. Chu

IPC分类号： G11C7/00 ,  H03K19/00 ,  H03K5/12

CPC分类号： G11C7/106 ,  G11C7/1051 ,  G11C7/1066 ,  G11C7/22 ,  G11C7/222

摘要： Circuits, methods, and apparatus that isolate an input register from spurious transitions on a DQS signal. One example receives an enable signal from a core. A logic circuit, which may be referred to as a one-half period circuit, shortens enable pulses at their front end by one-half a period. The shortened enable signal is passed to a storage element such as a register. Active pulses of the shortened enable signal clear the register, which provides a control signal closing a switch, such as an AND gate. The switch passes the DQS signal to the input register when closed and isolates the input register from the DQS signal when open. The shortened enable signal prevents the switch from opening early and passing spurious transitions on the DQS signal, for example during back-to-back non-consecutive read cycles.