MAC7200 datasheet(756/976 Pages) FREESCALE

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eMIOS Features on MAC72xx

MAC7200 Microcontroller Family Reference Manual, Rev. 2

678

Freescale Semiconductor

NOTE

The terms “MTS” and “eMIOS” are used interchangeably in this document.

32.2

eMIOS Features on MAC72xx

•

8 or 16 unified channels, with every channel able to provide all timer functions and modes.

•

All channels can be enabled for eDMA service.

•

Channels can be individually disabled to assist with power saving.

•

Two or three 16-bit counter buses (A and B, or A, B and C) for sharing time base around the

module.

•

One global prescaler and an individual prescaler available for each channel.

•

Modulus counter mode on all channels.

•

Single action input capture or output compare modes on all channels.

•

Input pulse width and period measurement modes on all channels.

•

Double action output compare mode on all channels.

•

Output pulse width and frequency modulation modes on all channels.

•

Output pulse width modulation modes on all channels.

•

Center aligned output pulse width modulation with dead time insertion modes on all channels.

•

Pulse or edge accumulation and counting modes on all channels.

•

Windowed programmable time accumulation mode on all channels.

•

Quadrature decode modes on all channels.

•

General purpose I/O available on unused eMIOS pins.

•

Center-aligned PWM with dead-time insertion

32.3

eMIOS Protocol

As the eMIOS supports several different protocols, please refer to the eMIOS Block Guide for a complete

description of eMIOS modes.

32.4

eMIOS Implementation

The eMIOS module has several different configuration options. On the MAC72xx devices, the eMIOS

module has the following configuration:

•

MDIS Reset Value: The reset value of the MDIS bit is 1, meaning that the eMIOS is in a disabled

state after reset, and must be explicitly enabled before it can be used.

•

Number of channels: The number of unified eMIOS channels on the MAC72x2 is 8. In this

configuration, the Counter Bus A is driven by Channel 7. The number of unified eMIOS channels

on the MAC72x1 is 16. In this configuration, the Counter Bus A is driven by Channel 15.

•

Timer Width: The width of all eMIOS timer channels on the MAC72xx is 16 bits.

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