ANALOG DEVICES EPROM Booting In Host Mode with 100 Pin 218x Processors Manual

About this manual

The document describes a method to boot Analog Devices' adsp218x series of DSP processors (specifically models 2184, 2185, 2186, 2187, and 2189) using the Byte Memory interface (BDMA). This is necessary when the processor is configured for host memory mode via the Mode C pin. In this configuration, the external address bus is limited to a single bit (A0), requiring specific hardware setup with address generators.

What's inside

• Overview
• Full Memory Mode
• Host Mode
• Accessing Peripherals
• Byte Memory Accesses
• System File Configuration

Frequently asked questions

How is the adsp218x processor configured for host memory mode?

The processor is configured for host memory mode by setting the external mode C pin to logic state 1 during reset.

What happens to the external address pins when the processor is in host mode?

The external address pins A[13:1] are repurposed to function as the lower 13 bits of the IDMA address/data bus.

What hardware is required to facilitate booting the DSP in host mode?

Address generators are required to drive the external address pins of the EPROM to facilitate booting.