TPU3 ROM Functions
MPC561/MPC563 Reference Manual, Rev. 1.2
D-22
Freescale Semiconductor
D.10
Multichannel Pulse-Width Modulation (MCPWM)
MCPWM generates pulse-width modulated outputs with full 0 to 100% duty cycle range independent of
other TPU3 activity. This capability requires two TPU3 channels plus an external gate for one PWM. (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 TPU3 channels for n PWMs, and center-aligned mode uses 2n + 1
channels. Center-aligned mode allows a user to define “dead time” so that two PWMs can be used to drive
an H-bridge without destructive current spikes. This feature is important for motor control applications.
See Freescale TPU Progamming Note
Multichannel PWM TPU Function (MCPWM), (TPUPN05/D).
shows the host interface areas for the MCPWM function in each mode.
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...