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……