资料介绍
This application note describes the methodology to use
the Parallel Master Port (PMP) module to interface with
external data memory; either external Flash or external
RAM. This application note also lists the APIs and
describes how to implement different types of
interfaces.
Using the PMP module, the memory devices with
64K locations (Kbytes or K words) can be interfaced
with no extra I/Os and software. This application note
describes how to interface the memory devices with
more than 64K locations using some I/O pins and
provides the required APIs.
This application note describes the following topics:
• “External Data Memory Interface Overview”
• “Functional Implementation”
• “Expansion Of External Memory”
• “Reference Code” AN1210
Using External Data Memory with
PIC24F/24H/dsPIC33F Devices
Author: Vidyadhar Vivekananda Signals Required for Interfacing Memory
Microchip Technology Inc. Devices
Table 1 provides the signals required to interface
INTRODUCTION different types of memory devices.
This application note describes the methodology to use
the Parallel Master Port (PMP) module to interface with TABLE 1: TYPICAL MEMORY DEVICE
external data memory; either external Flash or external INTE
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