MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 274

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

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

MPC555
USER’S MANUAL
/
MPC556
buclk_enable = 1
& hreset_b = 0
else
BUCLK_ENABLE = (STBUC | LOC) & LME lock indicates loss of lock
status bit (LOCS) for all cases and loss of clock sticky bit (LOCSS)
when state 3 is active. When BUCLK_ENABLE is changed, the chip
asserts HRESET to switch the system clock to BUCLK or PLL.
At PORESET negation, if the PLL is not locked, the loss-of-clock
sticky bit (LOCSS) is asserted, and the chip should operate with BU-
CLK.
Figure 8-8 Clock Source Flow Chart
3,BUCLK
6,BULCK
poreset_b = 1
LME = 1
CLOCKS AND POWER CONTROL
buclk_enable=0
& hreset_b=0
Rev. 15 October 2000
buclk-enable = 1
& hreset_b = 0
2,BUCLK
1,BUCLK
NOTES
else
4,osc
5, osc
LME = 0
buclk_enable = 0
& hreset_b = 0
hreset_b = 0
else
LOCS
MOTOROLA
8-14