Core Hang Conditions - Analog Devices ADSP-21364 EZ-KIT Lite Manual

Table 1-4. While Target is Halted Options
Option
Stop I/O DMA Stops IO DMAs in emulator space. This option disables DMA requests when
Stop External
Port (EP) Bus
Access
Table 1-5. On Emulator Exit Options
Option Description
On Emulator Determines the state the processor is left in when the emulator relinquishes con-
Exit trol of the processor:
Reset DSP and Run causes the processor to reset and begin execution from its
reset vector location.
Run from current PC causes the processor to begin running from its current
location.

Core Hang Conditions

Certain peripheral devices, such as host ports, DMA, and link ports, can
hold off the execution of processor instructions. This is known as a hung
condition and commonly occurs when reading from an empty port or
writing to a full port. If an attempt to halt the processor is made during
one of these conditions, the EZ-KIT Lite may encounter a core hang.
Normally, a core hang can be cleared by the board using a special
clear/abort bit. However, there are cases in which it is desirable or possible
not to clear the core hang. Sometimes it is desirable to wait for the core
ADSP-21364 EZ-KIT Lite Evaluation System Manual
Description
the emulator has control of the processor. data in the EP, LINK, or SPORT
DMA buffers are held there unless the internal DMA request was already
granted. This option holds off incoming data and ceases outgoing data. Because
SPORT-receive data cannot be held off, it is lost, and the overrun bit is set. The
direct write buffer (internal memory write) and the EP pad buffer are allowed
to flush any remaining data to internal memory.
Stops IO processor external port (EP) operation in emulator space.
This option disables all EP requests when the emulator has control of the pro-
cessor. After acknowledging an emulation interrupt, this option deasserts ACK
(deasserts REDY if host access), preventing further data from being accepted if
the EP is accessed.
Using EZ-KIT Lite
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