MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 836

• 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

D.10 Multichannel Pulse-Width Modulation (MCPWM)
MPC555 / MPC556
USER’S MANUAL
MCPWM generates pulse-width modulated outputs with full 0% to 100% duty cycle
range independent of other TPU activity. This capability requires two TPU channels
plus an external gate for one PWM channel. (A simple one-channel PWM capability is
supported by the QOM function.)
Multiple PWMs generated by MCPWM have two types of high time alignment: edge
aligned and center aligned. Edge-aligned mode uses n + 1 TPU channels for n PWMs;
center-aligned mode uses 2n + 1 channels. Center-aligned mode allows a user-de-
fined “dead time” to be specified so that two PWMs can be used to drive an H-bridge
without destructive current spikes. This feature is important for motor control applica-
tions. See Motorola TPU Progamming Note
(MCPWM),
Figure D-13
tion in each mode.
(TPUPN05/D).
through
Figure D-18
TPU ROM FUNCTIONS
Rev. 15 October 2000
show the host interface areas for the MCPWM func-
Multichannel PWM TPU Function
MOTOROLA
D-22