Force Out Logic - NXP Semiconductors freescale KV4 Series Reference Manual

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37.5.2.6 Force Out Logic

For each submodule, software can select between eight signal sources for the

FORCE_OUT signal: local CTRL2[FORCE], the Master Force signal from submodule0,

the local Reload signal, the Master Reload signal from submodule0, the Local Sync

signal, the Master Sync signal from submodule0, the EXT_SYNC signal from on- or off-

chip, or the EXT_FORCE signal from on- or off-chip depending on the chip architecture.

The local signals are used when the user simply wants to change the signals on the output

pins of the submodule without regard for synchronization with other submodules.

However, if it is required that all signals on all submodule outputs change at the same

time, the Master, EXT_SYNC, or EXT_FORCE signals should be selected.

Figure 37-238

illustrates the Force logic. The SEL23 and SEL45 fields each choose from

one of four signals that can be supplied to the submodule outputs: the PWM signal, the

inverted PWM signal, a binary level specified by software via the OUT23 and OUT45

bits, or the PWM_EXTA or PWM_EXTB alternate external control signals. The

selection can be determined ahead of time and, when a FORCE_OUT event occurs, these

values are presented to the signal selection mux that immediately switches the requested

signal to the output of the mux for further processing downstream.

Master Force

Local Reload

Master Reload

Freescale Semiconductor, Inc.

from generation h/w

from generation h/w

Figure 37-238. Force Out Logic

KV4x Reference Manual, Rev. 2, 02/2015

Chapter 37 Pulse Width Modulator A (PWMA/eFlexPWM)

Master Force

(from submod0