Functional Description; Arm ® Cortex ® -M4 Core; Figure 6.1-1 Cortex ® -M4 Block Diagram - Nuvoton ISD94124BYI Technical Reference Manual

6

FUNCTIONAL DESCRIPTION

® ®
6.1 ARM Cortex -M4 Core
®
The Cortex -M4 processor, a configurable, multistage, 32-bit RISC processor, has three AMBA
AHB-Lite interfaces for best parallel performance and includes an NVIC component. The processor
with optional hardware debug functionality can execute Thumb code and is compatible with other
®
Cortex -M profile processors. The profile supports two modes -Thread mode and Handler mode.
Handler mode is entered as a result of an exception. An exception return can only be issued in
Handler mode. Thread mode is entered on Reset, and can be entered as a result of an exception
®
return. The Cortex -M4F is a processor with the same capability as the Cortex
includes floating point arithmetic functionality. The ISD94100 series contains an embedded
Cortex ® -M4F processor. Throughout this document, the name Cortex
®
M4 and Cortex -M4F processors. The following figure shows the functional controller of the
processor.
®
Cortex -M4 processor features:

A low gate count processor core, with low latency interrupt processing that has:

A subset of the Thumb instruction set, defined in the ARMv7-M Architecture
Reference Manual
Sep 9, 2019
ISD94100 Series Technical Reference Manual
®
Figure 6.1-1 Cortex -M4 Block Diagram
Page 46 of 928
®
-M4 processor and
® -M4 refers to both Cortex
Rev1.09
® -