High Quality Content by WIKIPEDIA articles! 32-bit and 64-bit PowerPC processors have been a favorite of embedded computer designers. To keep costs low on high-volume competitive products, the CPU core is usually bundled into a system-on-chip (SOC) integrated circuit. SOCs contain the processor core, cache and the processor`s local data on-chip, along with clocking, timers, memory (SDRAM), peripheral (network, serial I/O), and bus (PCI, PCI-X, ROM/Flash bus, I2C) controllers. IBM also offers an open bus architecture (called CoreConnect) to facilitate connection of the processor core to memory and peripherals in a SOC design. IBM and Motorola have competed along parallel development lines in overlapping markets. A recent development is the BookE PowerPC Specification, implemented by both IBM and Freescale Semiconductor, which defines embedded extensions to the PowerPC programming model.