公开(公告)号：EP0746817A4

公开(公告)日：1996-03-13

申请号：EP92924262

申请日：1992-11-12

Applicant: MICROCHIP TECH INC

Inventor： YACH RANDY L ,  MITRA SUMIT

IPC: G06F1/04 ,  G06F1/24 ,  G06F11/267 ,  G06F15/78 ,  G06F11/00 ,  G06F1/00 ,  G06F9/00 ,  H03K17/22 ,  H03K17/28

CPC classification number: G06F1/24 ,  G06F11/221

Abstract: A microcontroller (10) is adapted, when operating, to execute programs and instructions and, in response, to generate control signals to selectively control external apparatus. The microcontroller (10) includes a power supply (70, 85) for supplying power to the overall device within a predetermined range suitable for its operation, and a clock for supplying a clock frequency to the microcontroller with a stability suitable for precise timing and counting within the device. The microcontroller (10) is selectively reset to prevent it from executing programs and instructions for purposes of generating the control signals, and is maintained in the reset condition despite initiation of a removal from the reset condition, until the power supplied by the power supply (70, 85) is in a predetermined range and the clock frequency supplied by the clock is stable.

Abstract translation: 微控制器在操作时适于执行程序和指令，并且作为响应，适于产生控制信号以选择性地控制外部设备。 微控制器包括用于在适于其操作的预定范围内向总体设备供电的电源，以及用于以适于在设备内精确定时和计数的稳定性向微控制器提供时钟频率的时钟。 微控制器被选择性地复位以防止它为了产生控制信号而执行程序和指令，并且尽管开始从复位状态移除直到电源提供的电源处于预定的状态 时钟提供的时钟频率稳定。 以这种方式，在实现器件稳定性之前，不允许微控制器的执行，以防止执行中的错误。 在所公开的实施例中，复位条件由上电定时器和振荡器启动定时器维持，每个定时器具有可编程的超时间隔，以仅在两个定时器的超时间隔已经到期时才结束复位条件。