21-02-2012, 05:13 PM
SYMBIAN OS
[attachment=17652]
INTRODUCTION
Just like PCs have an operating system like Windows, Symbian is the O.S for mobile phones. But unlike PC design, mobile phone put constrains on a suitable O.S. The operating system has to have a low memory footprint, and low dynamic memory usage, and efficient power management framework and real time support for communication and telephony protocols. Symbian OS is designed for the mobile phone environment .It addresses constraints of mobile phones by providing a framework to handle low memory situations, a power management., and a rich software layer implementing industry standards for communication , telephony and data rendering .
EVOLUTION
Symbian OS development was a joint venture of world’s leading mobile phone companies like Nokia , Ericsson and Motorola . After the introduction of first generation mobile phones, these companies realized that adding new functionalities to their handsets was a key market sector. Thus back in 1998, they jointly developed an operating system suited for mobile phone environment.
CPU CORE
Central to data enabled mobile phones is a fast, low power, low cost CPU core, which has a compact code and can be highly integrated with peripherals .The family of ARM architecture RISC processors are usually used .The CPU core has a memory management unit (MMU) for efficient usage of valuable memory space, and a cache for speedy access of data. The CPU core must be capable of operating in various privileged access modes to handle interrupts and exceptions .It is here, all the logic calculations and decisions are being carried out.
SYSTEM ON CHIP (SoC)
The CPU core is placed in an SoC . SoC also contains timers, interrupt controllers, DMA controllers and other vital peripherals for the effective functioning of phone operating system.These SoCs are often commercially available and are some times custom build by handset manufacturers . Some of the SoCs developed by Intel are Intel strong ARM processor series and Intel X-scale series.
PHONE PCB
Phone PCB is the motherboard of mobile. The system on chip (SoC) is placed in the phone PCB. The I\O systems like LCD , keypad , audio codec , radio , etc. are connected to this PCB. It also contains some memory.
[attachment=17652]
INTRODUCTION
Just like PCs have an operating system like Windows, Symbian is the O.S for mobile phones. But unlike PC design, mobile phone put constrains on a suitable O.S. The operating system has to have a low memory footprint, and low dynamic memory usage, and efficient power management framework and real time support for communication and telephony protocols. Symbian OS is designed for the mobile phone environment .It addresses constraints of mobile phones by providing a framework to handle low memory situations, a power management., and a rich software layer implementing industry standards for communication , telephony and data rendering .
EVOLUTION
Symbian OS development was a joint venture of world’s leading mobile phone companies like Nokia , Ericsson and Motorola . After the introduction of first generation mobile phones, these companies realized that adding new functionalities to their handsets was a key market sector. Thus back in 1998, they jointly developed an operating system suited for mobile phone environment.
CPU CORE
Central to data enabled mobile phones is a fast, low power, low cost CPU core, which has a compact code and can be highly integrated with peripherals .The family of ARM architecture RISC processors are usually used .The CPU core has a memory management unit (MMU) for efficient usage of valuable memory space, and a cache for speedy access of data. The CPU core must be capable of operating in various privileged access modes to handle interrupts and exceptions .It is here, all the logic calculations and decisions are being carried out.
SYSTEM ON CHIP (SoC)
The CPU core is placed in an SoC . SoC also contains timers, interrupt controllers, DMA controllers and other vital peripherals for the effective functioning of phone operating system.These SoCs are often commercially available and are some times custom build by handset manufacturers . Some of the SoCs developed by Intel are Intel strong ARM processor series and Intel X-scale series.
PHONE PCB
Phone PCB is the motherboard of mobile. The system on chip (SoC) is placed in the phone PCB. The I\O systems like LCD , keypad , audio codec , radio , etc. are connected to this PCB. It also contains some memory.
