Smart Internet Appliance Processor (siap)

The AT75C DSP subsystem is an autonomous DSP-based computation block that co- exists on-chip with other processors and functions. It is built around a 16-bit, fixed- point, industry-standard OakDSPCore. Additionally, the DSP subsystem embeds all elements necessary to run complex DSP algorithms independently without any exter- nal resources. The self-contained subsystem contains the OakDSPCore itself, program memory, data memory, an on-chip emulation module and a flexible codec Interface These resources allow the subsystem to run complex DSP routines, such as V.34 modem emulation or state-of-the-art voice compression. The codec Interface permits connection of any external industry-standard codec device, allowing the DSP subsystem to handle directly external Analog signals such as telephone line or handset signals. Communication between the DSP subsystem and the on-chip ARM7TDMI core is achieved through a semaphore-operated dual-port mailbox. By ATMEL Corporation