MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 271
![KIT EVALUATION FOR MPC555](/photos/39/39/393932/mpc555evbimage_sml.jpg)
MPC555CME
Manufacturer Part Number
MPC555CME
Description
KIT EVALUATION FOR MPC555
Manufacturer
Freescale Semiconductor
Type
Microcontrollerr
Datasheet
1.MPC555CME.pdf
(966 pages)
Specifications of MPC555CME
Contents
Module Board, Installation Guide, Power Supply, Cable, Software and more
Processor To Be Evaluated
MPC555
Data Bus Width
32 bit
Interface Type
RS-232
For Use With/related Products
MPC555
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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MPC555
USER’S MANUAL
System Frequency (FREQ
The system clocks GCLK1 and GCLK2 frequency is:
Therefore, the complete equation for determining the system clock frequency is:
The clocks GCLK1_50 and GCLK2_50 frequency is:
Figure 8-7
where FREQsysmax = System Frequency (FREQ
/
MPC556
GCLK1 Divide by 1
GCLK2 Divide by 1
GCLK1 Divide by 2
GCLK2 Divide by 2
GCLK1 Divide by 4
GCLK2 Divide by 4
shows the timing of USIU clocks when DFNH = 1 or DFNL = 0.
Figure 8-6 Divided System Clocks Timing Diagram
FREQ
FREQ
SYS
50
CLOCKS AND POWER CONTROL
=
) =
------------------------------------------------------- -
(
sys
2
Rev. 15 October 2000
DFNH
FREQsysmax
OSCCLK
DIVF + 1
=
------------------------------------------------------- -
(
)or 2
2
DFNH
FREQsysmax
(
SYS
DFNL
)or 2
)/2
x
(
+
1
DFNL
(2
)
×
DFNH
--------------------------
EBDF
+
1
(MF + 1)
)
or 2
1
+
DFNL + 1
1
)
x
MOTOROLA
2
2
8-11
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