Loongson 2F processor cpu

The Loongson2F is an evolution of the Loongson2E with the enhanced I/O and memory accessing bandwidth and a software work frequency changing scheme and compatibility to MIPS64. The Loongson2F has a standard 32-bit PCI/PCI-X interface, a standard 64-bit DDR2 interface, an 8/16- bit Local IO interface, a 4-bit GPIO interface and an enhanced processor core developed from Loongson2E. It is intended to be build into a system via standard PCI/PCI-X bus. It can both act as a master or a target PCI/PCI-X as device/host. It is also intended to achieve higher memory accessing bandwidth by utilizing a 64-bit DDR2 memory controller. It is expected to have better power management ability by using a software manageable work frequency changing scheme. The operating system can utilize this feature to change the processor frequency according to the workload. The Loongson2F integrates a video accelerate module in its write data path to PCI/PCI-X controller. Accompany with software driver, the video accelerate module can transfer YUV format video data to RGB format and do zoom action automatically. This can greatly reduce the processor's work load when the system utilizes a simple VGA controller.