公开(公告)号：US20040136238A1

公开(公告)日：2004-07-15

申请号：US10697957

申请日：2003-10-30

Applicant: STMicroelectronics S.A.

Inventor： Sylvie Wuidart ,  Luc Wuidart

IPC: G11C011/34

CPC classification number: G11C17/18 ,  G11C11/5692 ,  G11C17/14

Abstract: A memory cell with at least two detectable states among which is an unprogrammed state, comprising, in series between two terminals of application of a read voltage, at least one first branch comprising: a pre-read stage comprising, in parallel, two switchable resistors having different values with a first predetermined difference; and a programming stage formed of a polysilicon programming resistor, a terminal of the programming resistor being accessible by a programming circuit capable of causing an irreversible decrease in its value.

Abstract translation: 具有至少两个可检测状态的存储单元是未编程状态，包括串行施加读取电压的两个端子之间的至少一个第一分支，包括：预读阶段，并联包括两个可切换电阻器 具有第一预定差值的不同值; 以及由多晶硅编程电阻器形成的编程阶段，编程电阻的端子可由能够导致其值不可逆地减小的编程电路访问。

公开(公告)号：US20020016890A1

公开(公告)日：2002-02-07

申请号：US09885450

申请日：2001-06-20

Applicant: STMicroelectronics S.A.

Inventor： Sylvie Wuidart

IPC: G06F012/14

CPC classification number: G06F12/1441 ,  G06F12/1483

Abstract: A secured microprocessor includes a rights allocation system for the allocation, to programs executable by the microprocessor, of permanent access rights to certain zones of the memory array of the microprocessor. The rights allocation system confers, on a sub-program shared by at least two programs, temporary rights of access to certain memory zones. The temporary rights are allocated when the sub-program is called by one of the programs as a function of the program calling the sub-program. The rights allocation system provides libraries in a secured microprocessor without harming the integrity of the rights conferred on programs using the libraries.

Abstract translation: 安全微处理器包括用于分配的权限分配系统，可由微处理器执行的程序，对微处理器的存储器阵列的特定区域的永久访问权限。 权利分配制度赋予由至少两个方案共享的子方案获得某些内存区域的临时访问权限。 当子程序被其中一个程序调用作为调用子程序的程序的函数时，临时权限被分配。 权利分配系统在安全的微处理器中提供库，而不会损害使用库的程序授予的权利的完整性。

公开(公告)号：US20030126513A1

公开(公告)日：2003-07-03

申请号：US10317005

申请日：2002-12-11

Applicant: STMicroelectronics S.A.

Inventor： Sylvie Wuidart

IPC: H04B001/74

CPC classification number: G06F11/1008 ,  G06F11/08 ,  G11C16/22

Abstract: An electrically erasable and programmable memory includes at least one non-erasable secured zone. Detection and/or correction of read errors in the secured zone is provided by recording redundant bits in the secured zone and delivering an error signal and/or a bit having the majority value when the redundant bits read in the secured zone are not equal.

Abstract translation: 电可擦除和可编程的存储器包括至少一个不可擦除的安全区域。 在安全区域中读取错误的检测和/或校正是通过在安全区域中记录冗余位并且当在安全区域中读取的冗余位不相等时传送误差信号和/或具有多数值的位来提供的。

公开(公告)号：US20020124183A1

公开(公告)日：2002-09-05

申请号：US10004527

申请日：2001-11-01

Applicant: STMicroelectronics S.A.

Inventor： Fabrice Marinet ,  Sylvie Wuidart

IPC: G06F011/30

CPC classification number: G06F21/755 ,  G06F2221/2143

Abstract: Before a predetermined processing sequence, the integrated circuit detects the state of at least one timer. The circuit controls the activation of the timer if it is not activated, and disables itself if the timer is activated.

Abstract translation: 在预定的处理顺序之前，集成电路检测至少一个定时器的状态。 如果定时器未激活，则电路控制定时器的激活，如果定时器被激活，则它将自动禁止。