sak-xc2766x-96f66l-ac Infineon Technologies Corporation, sak-xc2766x-96f66l-ac Datasheet - Page 93

• Manufacturer Part Number: sak-xc2766x-96f66l-ac
• Description: 16/32-bit Single-chip Microcontroller With 32-bit Performance
• Manufacturer: Infineon Technologies Corporation

Preliminary
Wakeup Clock
When wakeup operation is selected (SYSCON0.CLKSEL = 00
derived from the low-frequency wakeup clock source:
f
In this mode, a basic functionality can be maintained without requiring an external clock
source and while minimizing the power consumption.
Selecting and Changing the Operating Frequency
When selecting a clock source and the clock generation method, the required
parameters must be carefully written to the respective bitfields, to avoid unintended
intermediate states.
Many applications change the frequency of the system clock (
order to optimize system performance and power consumption. Changing the operating
frequency also changes the switching currents, which influences the power supply.
While the core voltage is generated by the on-chip EVRs, the operating frequency can
only be changed by maximum factors of 5 or in maximum steps of 20 MHz, whichever
condition is tighter.
To avoid the indicated problems, recommended sequences are provided which ensure
the intended operation of the clock system interacting with the power system.
Data Sheet
SYS
=
f
WU
.
91
XC2000 Family Derivatives
f
SYS
Electrical Parameters
B
), the system clock is
) during operation in
V2.0, 2008-03
XC2766X