Basics Of Raspberry Pi

Raspberry Pi 

System on Chip (SoC)
• What is System on Chip?
– A complex IC that integrates the major functional elements
into a single chip or chipset.
• programmable processor
• on-chip memory
• accelerating function hardware (e.g. GPU)
• both hardware and software
• analog components

 Benefits of SoC
– Reduce overall system cost
– Increase performance
– Lower power consumption
– Reduce size

SoC in Raspberry Pi: Broadcom
BCM2835 SoC Multimedia processor

• CPU
– ARM 1176JZF-S (armv6k) 700MHz
– RISC Architecture and low power draw
– Not compatible with traditional PC software

• GPU
– Broadcom Video IV
– Specialized graphical instruction sets

• RAM
– 512MB (Model B rev.2)
– 256 MB (Model A, Model B rev.1)

Connecting a Display and Audio

• HDMI
– Digital signal
– Video and audio signal
– DVI cannot carry audio signal
– Up to 1920x1200 resolution

• Composite RCA
– Analog signal
– 480i, 576i resolution
• 3.5mm jack

Universal Serial Bus

• Two USB 2.0 ports in RPi

• Buy a powered USB hub

Passive models are cheaper and smaller, but lack the ability to run currenthungry

devices like CD drives and external hard drives

Storage: Secure Digital (SD)

• Form factor

– SD, Mini SD, Micro SD

• Types of Card

– SDSC (SD): 1MB to 2GB

– SDHC: 4GB to 32 GB

– SDXD up to 2TB

The card should be at least 2GB in

capacity to store all the required files

Networking

USB Ethernet Converter

IEEE 802.11 Wi-Fi

– Protocols

• 802.11 b, up to 11Mbps

• 802.11 g, up to 54Mbps

• 802.11 n, up to 300Mbps

• 802.11 ac (draft), up to

1Gbps

– Frequency band

• 2.4GHz, 5GHz

Low Speed Peripherals

• General Purpose

Input/Output (GPIO)

– Pins can be configured to

be input/output

– Reading from various

environmental sensors

• Ex: IR, video,

temperature, 3-axis

orientation, acceleration

– Writing output to dc

motors, LEDs for status

Power Consumption

• microUSB power connector

– 2.5W (model A)

– 3.5W (model B)

• Powered USB hub

– To provide more power for USB peripherals