PT CPC5565, User Manual, Page: 101 / 118

101
Chapter 6
Reset
This chapter discusses the various reset types and reset sources on the CPC5565. Because
many embedded systems have different requirements for board reset functions, the
incorporation of this sub-system on the CPC5565 has been designed to provide maximum
flexibility.
Reset Types and Sources
The CPC5565's three reset types are listed below. The sources for each reset type are detailed
in the following topics.
• Backend Power Down: The backend logic is powered off. All on-board devices are reset.
• Push Button Reset: All on-board devices are reset
• NMI: Non-Maskable Interrupt. Though not a reset in the strict sense, an NMI can have the same
effect as other resets.
• The CPC5565 can be reset by the J1 PCI reset signal (this is switch selectable - see “SW1-4: Drone
Reset Control” on page 38 ).
General Reset Sources
Push-Button Reset
When the reset button on the front panel is pressed, the CPC5565 resets itself.
Sources for push-button reset include:
• Front panel push-button reset switch (see Figure 2-1, “CPC5565 Front Panel,” on page 19
)
• Programmable watchdog timer
NMI\SMI\SERIRQ Sources
Watchdog Timer
The watchdog timer can be programmed to generate a non-maskable interrupt or system
management interrupt if it is not strobed within a given time-out period.