PIC16C64/74 microcontrollers from Microchip Technol-
ogy Inc. can be interfaced with ease into a
multi-microprocessor environment using its built-in Par-
allel Slave Port (PSP). With their very high operating
speeds (cycle times as low as 200 ns with a clock rate
of 20 MHz), and an array of on-chip peripherals, these
microcontrollers make ideal smart interfaces to the real
world.M Using the 8-Bit Parallel Slave Port
AN579
The port pins are connected to two 8-bit latches, one for
Author: Scott Fink data output (from the PIC16CXXX) and one for data
Microchip Technology Inc. input. The PIC16CXXX sends data by writing to the
output latch, and receives data by reading the input
INTRODUCTION latch (note that the input and output latches are at the
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