Key features are shown below. ? MPC603e series e300 core – Superscalar architecture – 760 MIPS at 400 MHz （–40 o C to +85 o C） – 16 KB Instruction cache， 16 KB Data cache – Double precision FPU – Instruction and Data MMU – Standard and Critical interrupt capability ? SDRAM / DDR Memory Interface – Up to 133 MHz operation – SDRAM and DDR SDRAM support – 256 MB addressing range per CS， two CS available – 32-bit data bus – Built-in initialization and refresh ? Flexible multi-function External Bus Interface – Supports interfacing to ROM/Flash/SRAM memories or other memory mapped devices – 8 programmable Chip Selects – Non-multiplexed data access using 8-/16-/32-bit databus with up to 26-bit address – Short or Long Burst capable – Multiplexed data access using 8-/16-/32-bit databus with up to 25-bit address ? Peripheral Component Interconnect （PCI） Controller – Version 2.2 PCI compatibility – PCI initiator and target operation – 32-bit PCI Address/Data bus – 33 and 66 MHz operation – PCI arbitration function ? ATA Controller – Version 4 ATA compatible external interface—IDE Disk Drive connectivity ? BestComm DMA subsystem – Intelligent virtual DMA Controller – Dedicated DMA channels to control peripheral reception and transmission – Local memory （SRAM 16 KB） ? 6 Programmable Serial Controllers （PSC） – UART or RS232 interface – CODEC interface for Soft Modem， Master/Slave CODEC Mode， I2S and AC97