Z32F0641MCU Datasheet, PDF (28/205 Pages) Zilog, Inc. – High Performance low-power Cortex-M3 core

Operation Mode
Z32F0641 Product Specification
System Control Unit
The INIT mode is the initial state of the chip when reset is asserted. The RUN mode is for maximum
performance of the CPU with a high-speed clock system. The SLEEP mode can be used as the low- power
consumption mode. Low-power consumption is achieved by halting the processor core and unused
peripherals.
Figure 4.8 shows the operating mode transition diagram.
Power-on
Reset
INIT
Reset Event
Reset Event
MCU
Initialization
SLEEP
Wake-up Event
WFI
SLEEPDEEP=0
RUN
Figure 4.8. Operating Mode
RUN Mode
In RUN mode, the CPU core and the peripheral hardware is operated by using the high-speed clock. After
reset, followed by the INIT state, the chip enters RUN mode.
SLEEP Mode
In SLEEP mode, only the CPU is stopped. Each peripheral function can be enabled by the function enable
and clock enable bit in the PER and PCER register.
PS034404-0417
PRELIMINARY
25