MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 577

• 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

15.15.3 MIOS1 Double Edge Single Output Pulse Generation
MPC555
USER’S MANUAL
Software can initialize the MIOS1 to generate both the rising and the falling edge of an
output pulse. With a MDASM, pulses as narrow as 50 ns can be generated since soft-
ware action is not needed between the edges. Pulses as long as 2.1 s can be gener-
ated. When an interrupt is desired, it can be selected to occur on every edge or only
after the second edge.
Figure 15-11
ate both edges of a single output pulse. The software puts the compare value for one
edge in register A and the other one in register B2. The MDASM automatically creates
both edges and the pulse can be selected by software to be a high-going or a low-go-
ing. After the trailing edge, the MDASM stops to await further commands from the soft-
ware. Note that a single edge output can be generated by writing to only one register.
MIOS Modulus Counter Submodule
Prescaler
Select
Clock
or Pin
From
/
MPC556
Figure 15-11 MIOS1 Example: Double Edge Output Compare
shows how a counter submodule and a MDASM can be used to gener-
16-bit Up-Counter
MODULAR INPUT/OUTPUT SUBSYSTEM (MIOS1)
Submodule Bus
Rev. 15 October 2000
Counter
Buses
16-bit
Two
Select
Bus
in OCB mode (MOD3 - MOD0 = 0b0100)
16-bit Register A
16-bit Register B2
16-bit Compare A
16-bit Compare B
MIOS Double Action Submodule
Compare
Interrupt
Flip-Flop
Trailing
Output
Output
Edge
on
Output
MOTOROLA
Pin
15-41