2008
Chapter-3 L26: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
1
DEVICES AND COMMUNICATION
BUSES FOR DEVICES NETWORK–
Lesson-26: WIRELESS AND MOBILE
SYSTEM PROTOCOLS─ IrDA
2008
Chapter-3 L26: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
2
Wireless Personal Area Protocols
λ
IrDA (Infrared Data Association)
λ Bluetooth 2.4 GHz
λ
802.11 WLAN and 802.11b WiFi
λ ZigBee 900 MHz
2008
Chapter-3 L26: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
3
IrDA
λ Used in mobile phones, digital
cameras, keyboard, mouse, printers to
communicate to laptop computer and
for data and pictures download and
synchronization.
λ Used for control TV, air-conditioning,
LCD projector, VCD devices from a
distance
2008
Chapter-3 L26: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
4
λ Use infrared (IR) after suitable
modulation of the data bits.
λ Communicates over a line of sight
λ Phototransistor receiver for infrared
rays
IrDA devices
2008
Chapter-3 L26: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
5
Infrared Data Association (IrDA)
IrDA
protocol
Embedded
device
Computer in
personal area
network
IDA
Interface
IDA
Interface
2008
Chapter-3 L26: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
6
λ Supports data transfer rates of up to 4 Mbps
λ Supports bi-directional serial
communication over viewing angle between
± 15° and distance of nearly 1 m
λ At 5 m, the IR transfer data can be up to
data transfer rates of 75 kbps
λ Should be no obstructions or wall in
between the source and receiver
IrDA protocol suite
2008
Chapter-3 L26: "Embedded Systems - " , Raj Kamal,
Publs.: McGraw-Hill Education
7
λ Level 1─ m