Hey people! This is about the Apple's A4 processor and the "stuff on the chip". I was surprised that Samsung had quite a big part to play! Anyways, here it is!
The Apple A4 is a package on package (PoP) system-on-a-chip (SoC) designed by Apple and manufactured by Samsung. It combines an ARM Cortex-A8 CPU with a PowerVR GPU, and emphasizes power efficiency.The chip commercially debuted with the release of Apple's iPad tablet; followed shortly by the iPhone 4 smartphone, the 4th generation iPod Touch and the 2nd generation Apple TV.
Apple A4 is based on the ARM processor architecture. The first version released runs at 1 GHz for the iPad and contains an ARM Cortex-A8 CPU core paired with a PowerVR SGX 535 graphics processor (GPU) built on Samsung's 45 nm process. Clock speed for the units used in the iPhone 4, iPod Touch, and Apple TVs have not been revealed.
The Cortex-A8 core used in the A4 is thought to use performance enhancements developed by chip designer Intrinsity (which was subsequently acquired by Apple)in collaboration with Samsung. The resulting core, dubbed "Hummingbird", is able to run at far higher clock rates than other implementations while remaining fully compatible with the Cortex-A8 design provided by ARM. Other performance improvements include additional L2 cache. The same Cortex-A8 CPU core used in the A4 is also used in Samsung's S5PC110A01 SoC.
The A4 processor package does not contain RAM, but supports PoP installation. The top package of the A4 used in the iPad, in the iPod Touch 4th gen and in the Apple TV 2nd gen contains two low-power 128 MB DDR SDRAM chips for a total of 256MB RAM. For the iPhone 4 there are two chips of 256 MB for a total of 512 MB. RAM is connected to the processor using ARM's 64-bit-wide AMBA 3 AXI bus. This is twice the width of the RAM data bus used in previous ARM 11 and ARM 9 based Apple devices, to support the greater need for graphics bandwidth in the iPad.
SOURCE : WIKIPEDIA
The Apple A4 is a package on package (PoP) system-on-a-chip (SoC) designed by Apple and manufactured by Samsung. It combines an ARM Cortex-A8 CPU with a PowerVR GPU, and emphasizes power efficiency.The chip commercially debuted with the release of Apple's iPad tablet; followed shortly by the iPhone 4 smartphone, the 4th generation iPod Touch and the 2nd generation Apple TV.
Apple A4 is based on the ARM processor architecture. The first version released runs at 1 GHz for the iPad and contains an ARM Cortex-A8 CPU core paired with a PowerVR SGX 535 graphics processor (GPU) built on Samsung's 45 nm process. Clock speed for the units used in the iPhone 4, iPod Touch, and Apple TVs have not been revealed.
The Cortex-A8 core used in the A4 is thought to use performance enhancements developed by chip designer Intrinsity (which was subsequently acquired by Apple)in collaboration with Samsung. The resulting core, dubbed "Hummingbird", is able to run at far higher clock rates than other implementations while remaining fully compatible with the Cortex-A8 design provided by ARM. Other performance improvements include additional L2 cache. The same Cortex-A8 CPU core used in the A4 is also used in Samsung's S5PC110A01 SoC.
The A4 processor package does not contain RAM, but supports PoP installation. The top package of the A4 used in the iPad, in the iPod Touch 4th gen and in the Apple TV 2nd gen contains two low-power 128 MB DDR SDRAM chips for a total of 256MB RAM. For the iPhone 4 there are two chips of 256 MB for a total of 512 MB. RAM is connected to the processor using ARM's 64-bit-wide AMBA 3 AXI bus. This is twice the width of the RAM data bus used in previous ARM 11 and ARM 9 based Apple devices, to support the greater need for graphics bandwidth in the iPad.
SOURCE : WIKIPEDIA
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