NXP Semiconductors freescale KV4 Series, Reference Manual

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AOI_BFCRT23n field descriptions (continued)
Field Description
00 Force the D input in this product term to a logical zero
01 Pass the D input in this product term
10 Complement the D input in this product term
11 Force the D input in this product term to a logical one
28.5 Functional Description
The AOI is a highly programmable module for creating combinational boolean outputs
for use as hardware triggers. Each AOI output channel, as shown in
Figure 28-1 , has one
logic function:
• Evaluation of a combinational boolean expression as a sum of four products where
each product term includes all four selected input sources available as true or
complement values
A typical application of the AOI module is to be integrated with one or more inter-
peripheral crossbar switch modules as illustrated in the following figure. The 20 external
inputs are shared by two crossbar switch modules. The crossbar switch on the top is used
to select the inputs to four 4-input AOI functions in the AOI module. The outputs of these
four AOI functions are output from the AOI module and are added to the original 20
external inputs to provide a total of 24 inputs to the bottom crossbar switch. As a result,
the bottom crossbar can not only direct any of the original 20 external inputs to any of its
outputs, it can also now direct any one of four 4-input AOI functions of those external
inputs to any of its outputs.
Chapter 28 Crossbar AND/OR/INVERT (AOI) Module
KV4x Reference Manual, Rev. 2, 02/2015
Freescale Semiconductor, Inc.
Preliminary
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