saf-xc878m-16ffi5v Infineon Technologies Corporation, saf-xc878m-16ffi5v Datasheet - Page 83

• Manufacturer Part Number: saf-xc878m-16ffi5v
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

Figure 20
Direct Drive (PLL Bypass Operation)
During PLL bypass operation, the system clock has the same frequency as the external
clock source.
PLL Mode
The CPU clock is derived from the oscillator clock, divided by the NR factor (PDIV),
multiplied by the NF factor (NDIV), and divided by the OD factor (KDIV). PLL output must
Data Sheet
OSCSS
OSC
Wrapper
fosc
PLL
CGU Block Diagram
PDIV
NR:1
PLLPD
fp
fn
detect
NF:1
core
NDIV
lock
PLL
fvco
f
SYS
76
=
KDIV
OD:1
f
OSC
PLL_LOCK
PLLBYP
watchdog
oscillator
External
Switching
circuitry
watchdog
Functional Description
PLL
XC87xCLM
V1.5, 2011-03
EXTOSCR
PLLR
f
SYS
(3.1)