Rainbow Electronics NUC140 - Manual (Page 22)

NUC140 Series DATA SHEET
5 FUNCTIONAL DESCRIPTION
5.1 ARM
®
Cortex™-M0 core
The Cortex™-M0 processor is a configurable, multistage, 32-bit RISC processor. It has an AMBA
AHB-Lite interface and includes an NVIC component. It also has optional hardware debug
functionality. The processor can execute Thumb code and is compatible with other Cortex-M profile
processor.
Figure 5-1 shows the functional blocks of processor.
Publication Release Date: May 31, 2010
- 22 - Revision V1.02
Cortex-M0
Processor
core
Nested
Vectored
Interrupt
Controller
(NVIC)
Breakpoint
and
Watchpoint
unit
Debugger
interface
Bus matrix
Debug
Access Port
(DAP)
Debug Cortex-M0 processor
Cortex-M0 components
Interrupts
Wakeup
Interrupt
Controller
(WIC)
Serial Wire or
JTAG debug port
AHB-Lite interface
Figure 5-1 Functional Block Diagram
The implemented device provides:
• A low gate count processor that features:
– The ARMv6-M Thumb® instruction set.
– Thumb-2 technology.
– ARMv6-M compliant 24-bit SysTick timer.
– A 32-bit hardware multiplier.
– The system interface supports little-endian data accesses.
– The ability to have deterministic, fixed-latency, interrupt handling.
– Load/store-multiples and multicycle-multiplies that can be abandoned and restarted to facilitate
rapid interrupt handling.
– C Application Binary Interface compliant exception model.
This is the ARMv6-M, C Application Binary Interface(C-ABI) compliant exception model that
enables the use of pure C functions as interrupt handlers.
– Low power sleep-mode entry using Wait For Interrupt(WFI), Wait For Even(WFE) instructions,
or the return from interrupt sleep-on-exit feature.
• NVIC that features:
– 32 external interrupt inputs, each with four levels of priority.