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公开(公告)号：US20230388028A1
公开(公告)日：2023-11-30
申请号：US18138087
申请日：2023-04-23
申请人： Rambus Inc.
CPC分类号： H04B17/11 , H04L7/0004 , H04L7/043 , H04L7/10 , H04L27/00 , H04B17/21 , H04L7/0016 , H04L7/0087 , H04B17/00
摘要： A method and system that provides for execution of a first calibration sequence, such as upon initialization of a system, to establish an operation value, which utilizes an algorithm intended to be exhaustive, and executing a second calibration sequence from time to time, to measure drift in the parameter, and to update the operation value in response to the measured drift. The second calibration sequence utilizes less resources of the communication channel than does the first calibration sequence. In one embodiment, the first calibration sequence for measurement and convergence on the operation value utilizes long calibration patterns, such as codes that are greater than 30 bytes, or pseudorandom bit sequences having lengths of 2N−1 bits, where N is equal to or greater than 7, while the second calibration sequence utilizes short calibration patterns, such as fixed codes less than 16 bytes, and for example as short as 2 bytes long.
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公开(公告)号：US20230224101A1
公开(公告)日：2023-07-13
申请号：US18078936
申请日：2022-12-10
申请人： Rambus Inc.
IPC分类号： H04L1/24 , H04L7/00 , G11C7/10 , H04L25/02 , G11C29/02 , H04L25/12 , H04L27/00 , H04L7/10 , G11C7/04 , H04L7/033
CPC分类号： H04L1/242 , H04L7/0016 , G11C7/1084 , H04L25/0292 , G11C29/028 , H04L25/12 , G11C29/022 , H04L27/00 , G11C7/1057 , H04L7/10 , H04L7/0091 , G11C29/025 , H04L7/0087 , G11C7/04 , G11C2207/2254 , H04L7/033
摘要： A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.
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公开(公告)号：US11552748B2
公开(公告)日：2023-01-10
申请号：US17386111
申请日：2021-07-27
申请人： Rambus Inc.
IPC分类号： H04L7/00 , H04L1/24 , H04L7/10 , H04L25/02 , H04L25/12 , G11C29/02 , G11C7/10 , H04L27/00 , G11C7/04 , H04L7/033
摘要： A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.
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公开(公告)号：US20200351038A1
公开(公告)日：2020-11-05
申请号：US16861164
申请日：2020-04-28
申请人： Rambus Inc.
摘要： A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.
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公开(公告)号：US20200258555A1
公开(公告)日：2020-08-13
申请号：US16790183
申请日：2020-02-13
申请人： Rambus Inc.
摘要： A memory system includes a memory controller with a plurality N of memory-controller blocks, each of which conveys independent transaction requests over external request ports. The request ports are coupled, via point-to-point connections, to from one to N memory devices, each of which includes N independently addressable memory blocks. All of the external request ports are connected to respective external request ports on the memory device or devices used in a given configuration. The number of request ports per memory device and the data width of each memory device changes with the number of memory devices such that the ratio of the request-access granularity to the data granularity remains constant irrespective of the number of memory devices.
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公开(公告)号：US10593390B2
公开(公告)日：2020-03-17
申请号：US15785918
申请日：2017-10-17
申请人： Rambus Inc.
IPC分类号： G06F12/00 , G11C11/406 , G06F13/16
摘要： Described are dynamic memory systems that perform overlapping refresh and data access (read or write) transactions that minimize the impact of the refresh transaction on memory performance. The memory systems support independent and simultaneous activate and precharge operations directed to different banks. Two sets of address registers enable the system to simultaneously specify different banks for refresh and data-access transactions.
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公开(公告)号：US10523344B2
公开(公告)日：2019-12-31
申请号：US16393817
申请日：2019-04-24
申请人： Rambus Inc.
摘要： A method and system that provides for execution of a first calibration sequence, such as upon initialization of a system, to establish an operation value, which utilizes an algorithm intended to be exhaustive, and executing a second calibration sequence from time to time, to measure drift in the parameter, and to update the operation value in response to the measured drift. The second calibration sequence utilizes less resources of the communication channel than does the first calibration sequence. In one embodiment, the first calibration sequence for measurement and convergence on the operation value utilizes long calibration patterns, such as codes that are greater than 30 bytes, or pseudorandom bit sequences having lengths of 2N−1 bits, where N is equal to or greater than 7, while the second calibration sequence utilizes short calibration patterns, such as fixed codes less than 16 bytes, and for example as short as 2 bytes long.
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公开(公告)号：US10236051B2
公开(公告)日：2019-03-19
申请号：US15666496
申请日：2017-08-01
申请人： Rambus Inc.
IPC分类号： G11C11/24 , G11C11/4076 , G11C7/10 , G06F13/16 , G06F13/40 , G11C5/06 , G11C29/02 , G11C29/50 , G11C8/18 , G11C7/22 , G06F1/10 , G11C11/409 , G11C11/4096 , G06F1/06 , G06F1/12 , G06F3/06 , G11C7/04
摘要： A memory controller component includes transmit circuitry and adjusting circuitry. The transmit circuitry transmits a clock signal and write data to a DRAM, the write data to be sampled by the DRAM using a timing signal. The adjusting circuitry adjusts transmit timing of the write data and of the timing signal such that an edge transition of the timing signal is aligned with an edge transition of the clock signal at the DRAM.
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公开(公告)号：US09667359B2
公开(公告)日：2017-05-30
申请号：US14718019
申请日：2015-05-20
申请人： Rambus Inc.
CPC分类号： H04B17/11 , H04B17/00 , H04B17/21 , H04L7/0004 , H04L7/0016 , H04L7/0087 , H04L7/043 , H04L7/10 , H04L27/00
摘要： A method and system that provides for execution of a first calibration sequence, such as upon initialization of a system, to establish an operation value, which utilizes an algorithm intended to be exhaustive, and executing a second calibration sequence from time to time, to measure drift in the parameter, and to update the operation value in response to the measured drift. The second calibration sequence utilizes less resources of the communication channel than does the first calibration sequence. In one embodiment, the first calibration sequence for measurement and convergence on the operation value utilizes long calibration patterns, such as codes that are greater than 30 bytes, or pseudorandom bit sequences having lengths of 2N−1 bits, where N is equal to or greater than 7, while the second calibration sequence utilizes short calibration patterns, such as fixed codes less than 16 bytes, and for example as short as 2 bytes long.
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公开(公告)号：US20160056948A1
公开(公告)日：2016-02-25
申请号：US14932192
申请日：2015-11-04
申请人： Rambus Inc.
IPC分类号： H04L7/00
CPC分类号： H04L7/0016 , G11C7/04 , G11C2207/2254 , H04L7/0087 , H04L7/0091 , H04L7/033 , H04L7/10 , H04L25/0292 , H04L25/12
摘要： A method and system provides for execution of calibration cycles from time to time during normal operation of the communication channel. A calibration cycle includes de-coupling the normal data source from the transmitter and supplying a calibration pattern in its place. The calibration pattern is received from the communication link using the receiver on the second component. A calibrated value of a parameter of the communication channel is determined in response to the received calibration pattern. The steps involved in calibration cycles can be reordered to account for utilization patterns of the communication channel. For bidirectional links, calibration cycles are executed which include the step of storing received calibration patterns on the second component, and retransmitting such calibration patterns back to the first component for use in adjusting parameters of the channel at first component.
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