GreenPAK™ with Asynchronous State Machine (ASM)

GreenPAK™ family devices that include the Asynchronous State Machine (ASM) macro-cell allow the user to develop their own custom state machine designs. The user has the option to set the definition of the states, the definition of allowed state transitions, and the definition of the signals that will trigger each state transition. This macro-cell can also be flexibly connected to I/O pins and other GPAK resources for state transition inputs, and outputs from the macro-cell can be routed to other resources or I/O pins. Two important performance parameters for this macro-cell are transition times of less than 1 µS from state to state, and a standby current of less than 1µA when not in active state transition.

GPAK设计器SW中的新ASM编辑器窗口中支持此ASM宏单元。这里显示的是ASM编辑器内的视图。此编辑器支持灵活性：

• Check boxes to select states in project, up to the allowable maximum number of states based on silicon architecture
• 编辑要匹配应用程序的状态名称
• Easy “point and click” actions to add state transitions
• Arrange state diagram for best comprehension
• Set value of output signals in Output RAM Array

在主GPAK设计器GUI中，ASM Macro-Cell会显示出驱动状态转换的输入，以及可以路由到其他内部资源的输出，或输出。在每个州内，允许的“下一个状态”在此处显示，具有输入，当断言时会导致状态转换发生。用于制作状态转换的资源之间的连接以及状态转换链路也在原始ASM编辑器窗口中显示，其中每个状态转换信号上的标签显示信号源。

As this macro-cell does not require a clock input, it will consume less than 1 µA when not in active state transition. This gives the designer tremendous flexibility to create low power designs in minutes. This is especially valuable when designing event driven systems that are waiting long periods of time with little activity, as the ASM macro-cell can remain in a low power state waiting for input, and and react in less than a µS to change state.