Freescale Semiconductor MPC5553 - Page 420

MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
Freescale Semiconductor 11-5
11.1.1.4 FMPLL Crystal Reference Mode Without FM
Figure 11-4. FMPLL Crystal Reference Mode without FM
RSTCFG
PLLCFG
[0]
PLLCFG
[1]
Clock
Mode
MODE PLLSEL PLLREF
1
1
PLLCFG Pins
Ignored
Crystal
Ref
(Default)
11 1
000
Bypass
Mode
00 0
001
External
Ref
11 0
0 1 0
Crystal
Ref
1 1 1
011
1:1
Mode
10 0
1
0 = External Reference, 1 = Oscillator
OSC
EXTAL
PFD/
Charge
Filter RFD
Bus Interface
Control/Status
Registers
Successive
Approximation
Frequency
FM
Control
1
0
Pumps
Current
Controlled
Oscillator
(ICO)
XTAL
PREDIV
0
1
MFD
PLLCFG[0:1]
MDIS
DSPI x 4
MCKO_EN
MCKO_GT
MCKO
Divider
MCKO
MDIS
EBI
MDIS
eMIOS
MDIS
eTPU Engines
MDIS
eSCI x 2
MDIS
CAN Interface CLK
FlexCAN x 3
CLK_SRC
Message Buffer CLK
ENGCLK
Divider
CLKOUT
Divider
ENGCLK
CLKOUT
NPC
PLLREF
PLLSEL
MODE
Core, INTC, eDMA, SIU, BAM,
RAMs, eQADC, Flash, XBAR,
PBRIDGE_A, PBRIDGE_B
Oscillator Clock
SIU
System
Clock
1
0
PLL
(3 in MPC5553)
(2 in MPC5553)
F
prediv
F
ref_crystal
F
ref_ext