xc2234l-20f80l Infineon Technologies Corporation, xc2234l-20f80l Datasheet - Page 90

• Manufacturer Part Number: xc2234l-20f80l
• Description: Lim 16/32-bit Single-chip Microcontroller With 32-bit Performance Xc2000 Family / Econo Line
• Manufacturer: Infineon Technologies Corporation

PRELIMINARY
Table 26
Parameter
VCO output frequency
4.6.2.2
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.
4.6.2.3
When selecting a clock source and the clock generation method, the required
parameters must be carefully written to the respective bit fields, 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.
To ensure proper operation of the on-chip EVRs while they generate the core voltage,
the operating frequency shall only be changed in certain steps. This prevents overshoots
and undershoots of the supply voltage.
Data Sheet
SYS
=
f
WU
.
Wakeup Clock
Selecting and Changing the Operating Frequency
System PLL Parameters
Symbol
f
VCO
CC 48
Min.
−
96
−
86
Values
Typ.
−
−
−
−
XC2000 Family / Econo Line
Max.
112
38
160
76
f
Unit Note /
MHz
MHz
MHz
MHz
SYS
Electrical Parameters
B
XC2230L, XC2234L
), the system clock is
) during operation in
Test Condition
VCOSEL
;
VCOmode
trolled
VCOSEL
;
VCOmode
e running
VCOSEL
;
VCOmode
trolled
VCOSEL
;
VCOmode
e running
V1.0, 2010-12
= 00b
= 00b
= 01b
= 01b
= con
= fre
= con
= fre