ST20-C1 STMICROELECTRONICS [STMicroelectronics], ST20-C1 Datasheet - Page 190

• Manufacturer Part Number: ST20-C1
• Description: Instruction Set Reference Manual
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Internal memory
Interrupt
Interrupt controller
Interrupt handler
Interrupt latency
Interrupted
IOreg
Iptr
Linked list
Little-endian
List
Local
Logical shift
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On-chip memory .
A signal from outside the CPU to switch from normal execution to execution of an
interrupt handler . If the interrupt causes a scheduling event, then that may cause
an immediate trap .
An on-chip peripheral which arbitrates between interrupt requests and signals to
the CPU when an interrupt is required.
The code and data which defines the action when an interrupt is taken.
The time taken from receiving an interrupt signal to starting execution of the
interrupt handler .
A process is in an interrupted state if it is waiting for an interrupt handler to
complete and it will continue as soon as the interrupt handler has completed.
The input and output register, whose bits are directly connected to peripherals .
The instruction pointer .
A linked list is an ordered data structure where each element includes a pointer to
the next element. A list is identified b y a front pointer, which points to the first
element in the list. Linked lists are also called queues .
Little-endian ordering of data, used by all ST20s, means that less significant data
is always held in lower addresses. This applies to bits in bytes, bytes in words and
words in memory.
See linked list.
A local variable is one that is addressed by means of an offset from the workspace
pointer. Local variables are usually held on a stack and are defined within a
function or procedure. cf. non-local .
A shift in which the sign bit is shifted by the same amount as any other bit.