MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 550

• 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
as a time reference for other submodules. Note that the MMCSM can also operate as
a free running counter by loading the modulus value of zero.
The main components of the MMCSM are an 8-bit prescaler counter, an 8-bit prescal-
er register, a 16-bit up-counter register, a 16-bit modulus latch register, counter load-
ing and interrupt flag generation logic.
The contents of the modulus latch register is transferred to the counter under the fol-
lowing three conditions:
Software can also write a value to the modulus register for later loading into the
counter with one of the two first criteria.
A software control register selects whether the clock input to the counter is the pres-
caler output or the corresponding input pin. The polarity of the external input pin is also
programmable.
Refer to
1. When an overflow occurs
2. When an appropriate transition occurs on the external load pin
3. When the program writes to the counter register. In this case, the value is first
/
MPC556
written into the modulus register and immediately transferred to the counter.
Table 15-36
MODULAR INPUT/OUTPUT SUBSYSTEM (MIOS1)
for the MMCSM relative I/O pin implementation.
Rev. 15 October 2000
MOTOROLA
15-14