80960KA Datasheet, PDF (10/43 Pages) Intel Corporation – EMBEDDED 32-BIT MICROPROCESSOR

80960KA
debug instruction. In each case, the 80960KA
executes the instruction first and then calls a trace
handling routine (usually part of a software debug
monitor). Further program execution is halted until the
routine completes, at which time execution resumes
at the next instruction. The 80960KA’s tracing
mechanisms, implemented completely in hardware,
greatly simplify the task of software test and debug.
1.1.10. Fault Detection
The 80960KA has an automatic mechanism to handle
faults. Fault types include trace and arithmetic faults.
When the processor detects a fault, it automatically
calls the appropriate fault handling routine and saves
the current instruction pointer and necessary state
information to make efficient recovery possible. Like
interrupt handling routines, fault handling routines are
usually written to meet the needs of specific applica-
tions and are often included as part of the operating
system or kernel.
For each of the fault types, there are numerous
subtypes that provide specific information about a
fault. The fault handler can use this specific infor-
mation to respond correctly to the fault.
1.1.11. Built-in Testability
Upon reset, the 80960KA automatically conducts an
exhaustive internal test of its major blocks of logic.
Then, before executing its first instruction, it does a
zero check sum on the first eight words in memory to
ensure that the memory image was programmed
correctly. If a problem is discovered at any point
during the self-test, the 80960KA asserts its FAILURE
pin and will not begin program execution. Self test
takes approximately 47,000 cycles to complete.
System manufacturers can use the 80960KA’s self-
test feature during incoming parts inspection. No
special diagnostic programs need to be written. The
test is both thorough and fast. The self-test capability
helps ensure that defective parts are discovered
before systems are shipped and, once in the field, the
self-test makes it easier to distinguish between
problems caused by processor failure and problems
resulting from other causes.
1.1.12. CHMOS
The 80960KA is fabricated using Intel’s CHMOS IV
(Complementary High Speed Metal Oxide Semicon-
ductor) process. The 80960KA is currently available
in 16, 20 and 25 MHz versions.
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