Harris Intelligent Transmitter Platinum-i Series - Cpld Complex Programmable Logic Device; Micro Controller CPLD

______________________________________________HARRIS
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WARNING: Disconnect and lockout AC primary power prior to servicing
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4.1.3 CPLD Complex Programmable Logic Device
This is the basic level controller and gives the transmitter a critical life support
functionality. This life support function is controlled by a watchdog circuit triggered
when the 376 micro is unresponsive.
The CPLD will control the transmitter ON/OFF state. It will respond to front panel and
customer parallel remote commands. The RF detector outputs will be monitored,
compared to references to protect the transmitter from fault conditions.
It also serves as memory mapped I/O to the 376 Microcontroller.
Figure 4-1 Controller Block Diagram