1.2.26 Analog System Builder with ACM Access

This use model is effective if you require access to the ACM during normal operation. The primary use is to access the Real Time Counter (RTC) registers for calendar or real-time applications. Alternatively, the ACM can be used to access the Analog I/O configurations.

In this configuration, the ASB contains additional ports to access the ACM. For more information, refer to the ASB Advanced Options - ACM Bus section.

The interface to the ACM must be run at less than 10Mhz, and the User block must run at the same clock frequency as SLOWCLK.

Another option is to place some synchronization logic in between your own block and the ACM interface. This enables you to run your own logic at a clock frequency independent of the ACM. shown below describes the setup if you select the ACM Bus as part of the Init/CFG interface.

If you choose the ACM Bus Independent option (in Advanced Options), then the multiplexor displayed below is instantiated directly in the Analog System block (ASB below) and you need to hook directly onto the ACM Bus interface.