mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 371

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
External Reference Clock
TRIM
DRST
IREFSTEN
Reference
Internal
Clock
n=0-7
RDIV
/ 2
FTRIM
IREFST CLKST OSCINIT
The MCG requires the attachment of a crystal oscillator (XOSC) module,
which provides an external reference clock.
n
LOC
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Monitor
Clock
CME
Figure 16-1. Multipurpose Clock Generator (MCG) Block Diagram
/ 2
OSCINIT
5
DIV32
(XOSC) (required)
Crystal Oscillator
DMX32
LP
IREFS
EREFSTEN
EREFS
RANGE
/(4,8,12,...,48)
HGO
Detector
Filter
Phase
VDIV
DCOM
DCOL
DCOH
FLL
NOTE
Charge
Internal
Pump
Filter
ERCLKEN
IRCLKEN
LP
DRS
Multipurpose Clock Generator (MCG)
DCOOUT
VCOOUT
VCO
PLLS
/ 2
PLL
CLKS
Multipurpose Clock Generator (MCGV3)
LOLS
Detector
Lock
n=0-3
BDIV
/ 2
LOCK
n
MCGPLLSCLK
MCGIRCLK
MCGERCLK
MCGOUT
MCGFFCLK
MCGFFCLKVALID
MCGLCLK
16-3