ECE 424 Embedded Systems Design Lecture 5: Platform Architecture Ning Weng

ECE 424 Embedded Systems

Design

Lecture 5: Platform ArchitectureNing Weng

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ES Platform ArchitectureWhat makes an embedded platform in the level of building blocks?

• Goal: a high level of familiarity with platform─ Components─ Physically connections – schematic level─ Logic view from software @ processor view

• Key─ Memory map and associated register maps of varying

devices• Key components:

─ Processor─ Interrupt controller─ Memories─ Times─ Devices InterfacesNing Weng

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System Overview

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Memory Map Representation

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A list of physical address of all the resources on the platfrom

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Basic Interrupt Controller

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Timer: logic configuration

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Timer: • What, Why and How.• Examples: OS Tick and WDT

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Memory Technologies• Volatile and no-volatile

• Example: DRAM on platform, a flash ROM device and local on-die SRAM

• Memory controller: coverts internal memory transactions to access memory devices

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Throughput via Pipelining

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DRAM Overview

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2 Phases: Row address Strobe and Column address Strobe3 latencies:

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Flash Structure

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Summary NAND/NOR Flash and SSD

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NAND Device

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PCIe Hierarchy

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USB Hierarchy

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Summary• Embedded Platform components• Many peripherals either integrated into SOC or

part of platform boards

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For Next Class• Read Chapter 5 for Processor Architecture