GreenPAK™ with Asynchronous State Machine (ASM)

GreenPak™系列设备包括异步状态机（ASM）宏小区允许用户开发自己的自定义状态机设计。用户可以选择设置状态的定义，允许状态转换的定义以及将触发每个状态转换的信号的定义。此宏小区也可以灵活地连接到I / O引脚和用于状态转换输入的其他GPAK资源，并且可以从宏小区输出路由到其他资源或I / O引脚。该宏小区的两个重要性能参数是从状态到状态的转换时间小于1μs，并且在不存在状态转换时的待机电流小于1μA。

This ASM macro-cell is supported in a new ASM Editor window in GPAK Designer SW. Shown here is the view inside the ASM editor. This editor supports the flexibility to:

• 复选框to select states in project, up to the allowable maximum number of states based on silicon architecture
• Edit state names to match application
• Easy “point and click” actions to add state transitions
• Arrange state diagram for best comprehension
• Set value of output signals in Output RAM Array

在主要GPAK设计师GUI, ASM macro-cell shows up with inputs that drive state transitions, and outputs that can be routed to other internal resources, or out to pins. Inside each state, the allowed “next states” show up here, with an input that when asserted will cause that state transition to happen. The connection between resources used to make state transitions, and the state transition links is also shown back in the original ASM Editor window with labels on each of the state transition signals showing the source of the signal.

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.