PIC18F87J11_12 Datasheet, PDF (189/466 Pages) Microchip Technology – 64/80-Pin, High-Performance, 1-Mbit Flash Microcontrollers

PIC18F87J11 FAMILY
12.4 Application Examples
This section introduces some potential applications for
the PMP module.
12.4.1
MULTIPLEXED MEMORY OR
PERIPHERAL
Figure 12-27 demonstrates the hookup of a memory or
other addressable peripheral in Full Multiplex mode.
Consequently, this mode achieves the best pin saving
from the microcontroller perspective. However, for this
configuration, there needs to be some external latches
to maintain the address.
FIGURE 12-27: EXAMPLE OF A MULTIPLEXED ADDRESSING APPLICATION
PIC18F
PMD<7:0>
PMALL
PMALH
PMCS
PMRD
PMWR
373 ^A<7:0>
D<7:0>
A<15:8>
373
A<15:0>
D<7:0>
CE
OE WR
Address Bus
Data Bus
Control Lines
 2007-2012 Microchip Technology Inc.
DS39778E-page 189