NXP Semiconductors MPC5606S - Block Diagram

Clock Description
MPC5606S Microcontroller Reference Manual, Rev. 7
Freescale Semiconductor 225
• Event generation for various failures detected inside monitoring unit
8.10.3 Block diagram
Figure 8-29. Clock Monitor Unit diagram
8.10.4 Functional description
The names of the clocks involved in this block have the following meaning:
• CK_FXOSC: clock from the external crystal oscillator
• CK_SIRC: clock from the low-frequency internal RC oscillator
• CK_FIRC: clock from the high-frequency internal RC oscillator
• CK_PLL: clock from the PLL
• FOSC: frequency of external crystal oscillator clock
• FRCslow: frequency of low-frequency internal RC oscillator
• FRCfast: frequency of high-frequency internal RC oscillator
• FPLL: frequency of FMPLL clock
CMU_MDR Register
FXOSC Supervisor
FOSC < FRC
fast
/ n
CMU_HREF Register
Fixed
Prescaler
/4
FPLL > href or
FPLL < FRC
fast
/ 4
FPLL < lfref
CMU_LFREF register
Frequency Meter
CMU_FDR
register
PLL Supervisor
OLR_evt
FLC_evt_a
FHH_evt_a
FLL_evt_a
FXOSC ON/OFF
From MC_ME
PLL ON/OFF
From MC_ME
MUX 1
CKSEL1[1:0]
00
01
10
11
CK_FIRC
CK_FIRC
CK_SIRC
CK_SXOSC
CK_FXOSC
ckpll_a