Configurable Enhanced Modular IO Subsystem (eMIOS200)MPC5644A Microcontroller Reference Manual, Rev. 6Freescale Semiconductor 639Chapter 22Configurable Enhanced Modular IO Subsystem (eMIOS200)22.1 Device-specific features• Sixteen 24-bit wide channels• 3 channels internal timebases can be shared between channels• 1 timebase from the eTPU can be imported and used by the channels• Global enable feature for all eMIOS200 and eTPU timebases• Doze mode is not supported• Each channel has its own pin (not available on all package types)22.2 IntroductionThe eMIOS200 module provides the capability to generate or measure timed events, for examplegenerating PWM waveforms or measuring input pulse width. It is implemented with its own configurationof timer channels to suit the target applications needs, while maintaining full backwards compatibility withprevious eMIOS implementations. The MPC5644A has one eMIOS200 module that implementstwenty-four 24-bit counters.The overall architecture of the eMIOS200 resembles that of its predecessor, the MIOS. The MIOS timerblock provided a framework where a set of sublocks with different timer functions were assembled toattend the specific needs of a device. The MPC5644AeMIOS200 builds on this concept by using amodified Unified Channel module that provides a superset of the functionality of individual MIOSchannels, while providing a consistent user interface. This allows more flexibility as each channel can beprogrammed for different functions in different applications of the device. In addition, the eMIOS200architecture allows the use of dedicated channels that perform specific functions not included in MIOSinheritance.NOTEThe MPC5644A eMIOS200 uses a modified version of the Unified Channelblock that contains a reduced set of functions compared to the MPC55xxUnified Channel. See Section 22.2.3, Channel configurations, for details.Figure 22-1 shows the block diagram of the MPC5644A eMIOS200 module.
