Clocks and Power Control
MPC561/MPC563 Reference Manual, Rev. 1.2
8-12
Freescale Semiconductor
NOTE
CLKOUT does not have a 50% duty cycle when the general system clock is
divided. The CLKOUT wave form is the same as that of GCLK2_50.
Figure 8-6. Divided System Clocks Timing Diagram
The system clocks GCLK1 and GCLK2 frequency is:
Therefore, the complete equation for determining the system clock frequency is:
GCLK1 Divide by 1
GCLK2 Divide by 1
GCLK1 Divide by 2
GCLK2 Divide by 2
GCLK1 Divide by 4
GCLK2 Divide by 4
FREQ
sys
FREQsysmax
2
DFNH
(
)
or 2
DFNL
1
+
(
)
-------------------------------------------------------------------
=
where FREQsysmax = VCOOUT/2
System Frequency=
OSCCLK
DIVF + 1
x
(MF + 1)
(2
DNFH
) or (2
DFNL
+ 1)
2
2
x
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...