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    • 2. 发明申请
    • AUTOMATIC BIT FAIL MAPPING FOR EMBEDDED MEMORIES WITH CLOCK MULTIPLIERS
    • 具有时钟乘法器的嵌入式存储器的自动位失效映射
    • US20050120270A1
    • 2005-06-02
    • US10707071
    • 2003-11-19
    • Darren AnandKevin GormanMichael Nelms
    • Darren AnandKevin GormanMichael Nelms
    • G06F11/00G11C29/00G11C29/14G11C29/56
    • G11C29/56G11C29/14G11C29/56008G11C2029/5604
    • A bit fail map circuit accurately generates a bit fail map of an embedded memory such as a DRAM by utilizing a high speed multiplied clock generated from a low-speed Automated Test Equipment (ATE) tester. The circuit communicates between the ATE tester, the embedded memory under test, Built-In Self-Test (BIST) and Built-In Redundancy Analysis (BIRA). An accurate bit fail map of an embedded DRAM memory is provided by pausing the BIST test circuitry at a point when a fail is encountered, namely a mismatch between BIST expected data and the actual data read from the array, and then shifting the bit fail data off the chip using the low-speed ATE tester clock. Thereafter, the high-speed test is resumed from point of fail by again running the BIST using the high-speed internal clock, to provide at-speed bit Fail Maps.
    • 位故障映射电路通过利用从低速自动测试设备(ATE)测试器产生的高速倍增时钟,精确地生成诸如DRAM的嵌入式存储器的位故障映射。 该电路在ATE测试仪,被测嵌入式内存,内置自检(BIST)和内置冗余分析(BIRA)之间进行通信。 通过在遇到失败时暂停BIST测试电路,即BIST预期数据与从阵列读取的实际数据之间的不匹配,然后移位位故障数据,提供嵌入式DRAM存储器的精确位故障映射 使用低速ATE测试仪时钟关闭芯片。 此后,通过使用高速内部时钟再次运行BIST,从故障点恢复高速测试,以提供高速位Fail Map。
    • 3. 发明申请
    • Integrated Redundancy Architecture and Method for Providing Redundancy Allocation to an Embedded Memory System
    • 集成冗余架构和方法为嵌入式存储系统提供冗余分配
    • US20050160310A1
    • 2005-07-21
    • US10707797
    • 2004-01-13
    • Wayne EllisKevin Gorman
    • Wayne EllisKevin Gorman
    • G06F11/00G11C29/00G11C29/44
    • G11C29/44G11C29/4401G11C29/74
    • An integrated redundancy architecture for an embedded memory system whereby a third memory element is added to the redundancy architecture such that all row and column fails may be stored in real-time. Architecture (20) includes a first memory element (22) (FME 22) having a register (24), a second memory element (26) (SME 26) having a register (28), a third memory element (30) (TME 30) having a register (32), and a finite state machine (34) (FSM 34) having a decision algorithm (36). FME (22), SME (26), TME (30), and FSM (34) are electrically connected to a built-in self-test (BIST) module (38). BIST module (38) outputs failed row and column addresses (40), also referred to as “fails,” for rows and columns that are identified as defective during the BIST to the memory elements and FSM (34). FSM (34) allocates redundancy resources of the memory system according to decision algorithm (36).
    • 用于嵌入式存储器系统的集成冗余架构,由此第三存储器元件被添加到冗余架构,使得可以实时地存储所有行和列失败。 架构(20)包括具有寄存器(24)的第一存储器元件(22)(FME 22),具有寄存器(28)的第二存储元件(26)(SME 26),第三存储器元件(30) 具有寄存器(32)和具有判定算法(36)的有限状态机(34)(FSM 34)。 FME(22),SME(26),TME(30)和FSM(34)电连接到内置自检(BIST)模块(38)。 对于在存储元件和FSM(34)的BIST期间被识别为有缺陷的行和列,BIST模块(38)输出失败的行和列地址(40),也称为“失败”。 FSM(34)根据决策算法(36)分配存储器系统的冗余资源。
    • 5. 发明申请
    • AUTOMATIC SHUTDOWN OR THROTTLING OF A BIST STATE MACHINE USING THERMAL FEEDBACK
    • 使用热反馈自动关机或弯曲状态机
    • US20070230260A1
    • 2007-10-04
    • US11278238
    • 2006-03-31
    • Kevin GormanEmory KellerMichael Ouellette
    • Kevin GormanEmory KellerMichael Ouellette
    • G11C29/00G11C7/00
    • G11C29/16G11C2029/5002
    • A Built-In-Self-Test (BIST) state machine providing BIST testing operations associated with a thermal sensor device(s) located in proximity to the circuit(s) to which BIST testing operations are applied. The thermal sensor device compares the current temperature value sensed to a predetermined temperature threshold and determines whether the predetermined threshold is exceeded. A BIST control element suspends the BIST testing operation in response to meeting or exceeding said predetermined temperature threshold, and initiates resumption of BIST testing operations when the current temperature value normalizes or is reduced. A BIST testing methodology implements steps for mitigating the exceeded temperature threshold condition in response to determining that the predetermined temperature threshold is met or exceeded. These steps include one of: ignoring the BIST results of the suspect circuit(s), or by causing the BIST state machine to enter a wait state and adjusting operating parameters of the suspect circuits while in the wait state.
    • 内置自测试(BIST)状态机,提供与位于BIST测试操作所在电路附近的热传感器设备相关的BIST测试操作。 热传感器装置将感测到的当前温度值与预定温度阈值进行比较,并确定是否超过预定阈值。 BIST控制元件响应于满足或超过所述预定温度阈值而暂停BIST测试操作,并且当当前温度值归一化或降低时,启动BIST测试操作的恢复。 响应于确定满足或超过预定温度阈值,BIST测试方法实现了减轻超过温度阈值条件的步骤。 这些步骤包括:忽略可疑电路的BIST结果,或通过使BIST状态机进入等待状态,并在等待状态下调整可疑电路的工作参数。
    • 10. 发明申请
    • SELF-TEST CIRCUITRY TO DETERMINE MINIMUM OPERATING VOLTAGE
    • 自检电路确定最小工作电压
    • US20060259840A1
    • 2006-11-16
    • US10908452
    • 2005-05-12
    • Wagdi AbadeerGeorge BracerasAnthony BonaccioKevin Gorman
    • Wagdi AbadeerGeorge BracerasAnthony BonaccioKevin Gorman
    • G01R31/28
    • G01R31/3004
    • A solution for determining minimum operating voltages due to performance/power requirements would be valid for a wide range of actual uses. The solution includes a test flow methodology for dynamically reducing power consumption under applied conditions while maintaining application performance via a BIST circuit. There is additionally provided a test flow method for dynamically reducing power consumption to the lowest possible stand-by/very low power level under applied conditions that will still be sufficient to maintain data/state information. One possible application would be for controlling the voltage supply to a group of particular circuits on an ASIC (Application Specific Integrated Circuit). These circuits are grouped together in a voltage island where they would receive a voltage supply that can be different from the voltage supply other circuits on the same chip are receiving. The same solution could be applied to a portion of a microprocessor (the cache logic control, for example).
    • 用于确定由于性能/功率要求而导致的最小工作电压的解决方案对于广泛的实际应用是有效的。 该解决方案包括测试流程方法,用于在应用条件下动态降低功耗,同时通过BIST电路保持应用性能。 另外提供了一种测试流程方法,用于在仍然足以维护数据/状态信息的应用条件下将功耗动态地降低到最低可能待机/极低功率水平。 一种可能的应用是用于控制对ASIC(专用集成电路)上的一组特定电路的电压供应。 这些电路分组在一个电压岛中,在那里它们将接收可以与同一芯片正在接收的其它电路的电压供给不同的电压源。 相同的解决方案可以应用于微处理器的一部分(例如,高速缓存逻辑控制)。