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公开(公告)号:US06615391B2
公开(公告)日:2003-09-02
申请号:US10087486
申请日:2002-03-01
IPC分类号: G06F1750
CPC分类号: H01L27/10855 , G11C29/40 , G11C29/48 , H01L21/28044 , H01L21/28114 , H01L21/6708 , H01L21/6715 , H01L21/76895 , H01L21/76897 , H01L27/10814 , H01L27/10852 , H01L27/10858 , H01L28/91 , H01L29/42376 , H01L29/4941
摘要: A semiconductor memory device (300) having a parallel test circuit is disclosed. A test data path (308) receives parallel I/O line (I/O0-I/O7) values, and generates therefrom test result data values (PASS and DATA_TST). The test result data values (PASS and DATA_TST) are coupled to a gate control circuit (312). The gate control circuit (312) provides either a first logic value, a second logic value, or an intermediate logic value to an open drain output driver (314) depending upon the test result data values (PASS and DATA_TST). In response to the logic values received from the gate control circuit (312), the open drain output driver (314) drives a data output (DQ) to a first, second or intermediate logic level.
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2.
公开(公告)号:US06381718B1
公开(公告)日:2002-04-30
申请号:US09372869
申请日:1999-08-12
IPC分类号: H04B1700
摘要: A semiconductor memory device (300) having a parallel test circuit is disclosed. A test data path (308) receives parallel I/O line (I/O0-I/O7) values, and generates therefrom test result data values (PASS and DATA_TST). The test result data values (PASS and DATA_TST) are coupled to a gate control circuit (312). The gate control circuit (312) provides either a first logic value, a second logic value, or an intermediate logic value to an open drain output driver (314) depending upon the test result data values (PASS and DATA_TST). In response to the logic values received from the gate control circuit (312), the open drain output driver (314) drives a data output (DQ) to a first, second or intermediate logic level.
摘要翻译: 公开了一种具有并联测试电路的半导体存储器件(300)。 测试数据路径(308)接收并行I / O线(I / O0-I / O7)值,并由其生成测试结果数据值(PASS和DATA_TST)。 测试结果数据值(PASS和DATA_TST)耦合到门控制电路(312)。 门控制电路(312)根据测试结果数据值(PASS和DATA_TST)向开漏输出驱动器(314)提供第一逻辑值,第二逻辑值或中间逻辑值。 响应于从栅极控制电路(312)接收到的逻辑值,开漏输出驱动器(314)将数据输出(DQ)驱动到第一,第二或中间逻辑电平。
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公开(公告)号:US06408411B1
公开(公告)日:2002-06-18
申请号:US09373265
申请日:1999-08-12
IPC分类号: G01R3128
CPC分类号: G11C29/40 , G11C11/401 , G11C2029/1208 , G11C2029/2602
摘要: A semiconductor memory device (300) having a parallel test circuit is disclosed. A test data path receives parallel I/O line (I/O0-I/O7) values, and generates therefrom test result data values (PASS and DATA_TST). The test result data values (PASS and DATA_TST) are coupled to a two-bit register (312) and output in a sequential fashion to an open drain output driver (314). In this manner, test result data values are provided by driving an output (DQ) in a rapid sequential fashion, rather than placing the output at one of three states (such as logic high state, a logic low state, or a high impedance state).
摘要翻译: 公开了一种具有并联测试电路的半导体存储器件(300)。 测试数据路径接收并行I / O线(I / O0-I / O7)值,并从其产生测试结果数据值(PASS和DATA_TST)。 测试结果数据值(PASS和DATA_TST)被耦合到两位寄存器(312)并以顺序方式输出到开漏输出驱动器(314)。 以这种方式,通过以快速顺序的方式驱动输出(DQ)来提供测试结果数据值,而不是将输出置于三种状态之一(例如逻辑高状态,逻辑低状态或高阻抗状态 )。
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