公开(公告)号：AT534077T

公开(公告)日：2011-12-15

申请号：AT06735222

申请日：2006-02-16

Applicant: MICROCHIP TECH INC

Inventor： MASGRAS CRISTIAN ,  PYSKA MICHAEL ,  BOLES EDWARD ,  TRIECE JOSEPH ,  WOJEWODA IGOR ,  CHEN MEI-LING

IPC: G06F11/27 ,  G11C29/46

Abstract: A special mode key match comparison module has N-storage elements and a special mode key match comparator. The N-storage elements accumulate a serial data stream, and then determine whether a digital device should operate in a normal user mode, in a public programming mode, or in a particular private test mode. To reduce the possibility of accidentally decoding a false test or programming mode, the data stream has a sufficiently large number of N-bits to substantially reduce the probability of a false decode. To further reduce the possibility of accidentally decoding a programming or test mode, the special mode key match comparison module may be reset if less or more than N-clocks are detected during the accumulation of the N-bit serial data stream. The special mode key match data patterns may represent a normal user mode, a public programming mode, and particular private manufacturer test modes.

公开(公告)号：WO2006091468A3

公开(公告)日：2006-12-21

申请号：PCT/US2006005462

申请日：2006-02-16

Applicant: MICROCHIP TECH INC ,  MASGRAS CRISTIAN P ,  PYSKA MICHAEL ,  BOLES EDAWRD BRIAN ,  TRIECE JOSEPH W ,  WOJEWODA IGOR ,  CHEN MEI-LING

Inventor： MASGRAS CRISTIAN P ,  PYSKA MICHAEL ,  BOLES EDAWRD BRIAN ,  TRIECE JOSEPH W ,  WOJEWODA IGOR ,  CHEN MEI-LING

IPC: G06F11/27 ,  G11C29/46

CPC classification number: G01R31/31701 ,  G06F11/273 ,  G11C29/003 ,  G11C29/46

Abstract: A special mode key match comparison module has N-storage elements and a special mode key match comparator. The N-storage elements accumulate a serial data stream, and then determine whether a digital device should operate in a normal user mode, in a public programming mode, or in a particular private test mode. To reduce the possibility of accidentally decoding a false test or programming mode, the data stream has a sufficiently large number of N-bits to substantially reduce the probability of a false decode. To further reduce the possibility of accidentally decoding a programming or test mode, the special mode key match comparison module may be reset if less or more than N-clocks are detected during the accumulation of the N-bit serial data stream. The special mode key match data patterns may represent a normal user mode, a public programming mode, and particular private manufacturer test modes.

Abstract translation: 特殊模式键匹配比较模块具有N个存储元件和特殊模式键匹配比较器。 N个存储元件累积串行数据流，然后确定数字设备是否应以正常用户模式，公共编程模式或特定专用测试模式运行。 为了减少意外解码错误测试或编程模式的可能性，数据流具有足够大数目的N位以显着降低错误解码的可能性。 为了进一步降低意外解码编程或测试模式的可能性，如果在N位串行数据流的累积期间检测到少于或多于N个时钟，则可以重置特殊模式密钥匹配比较模块。 特殊模式键匹配数据模式可以表示正常用户模式，公共编程模式和特定的私人制造商测试模式。