AT75C Datasheet | Atmel

Features - - - - - - - - - - - Fully Autonomous DSP System 16-bit Fixed-point Oak DSPCore® 24K x 16 of Uploadable Program RAM 16K x 16 of Data RAM 2K x 16 of X-RAM 2K x 16 of Y-RAM X-RAM and Y-RAM Accessible within the Same Cycle JTAG Interface Available on AT75C220 and AT75C320 On-chip Emulation Module Flexible Codec Interface munication with External Processor through Dual-port Mailbox Description The AT75C DSP subsystem is an autonomous DSP-based putation block that coexists on-chip with other processors and functions. It is built around a 16-bit, fixedpoint, industry-standard Oak DSPCore. Additionally, the DSP subsystem embeds all elements necessary to run plex DSP algorithms independently without any external resources. The self-contained subsystem contains the Oak DSPCore itself, program memory, data memory, an on-chip emulation module and a flexible codec interface. These resources allow the subsystem to run plex DSP routines, such as V.34 modem emulation or state-of-the-art voice pression. 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. munication between the DSP subsystem and the on-chip ARM7TDMI™ core is achieved through a semaphore-operated dual-port mailbox. Smart Internet Appliance Processor (SIAP™) AT75C DSP Subsystem Rev. 1368C- INTAP- 08/02 Architectural Overview Figure 1. AT75C DSP Subsystem Block Diagram Oak Program Bus 2K x 16 X-RAM Oak Data Bus Codec Interface 2K x 16 Y-RAM 24K x 16 Program RAM Oak DSPCore 16K x 16 Generalpurpose RAM On-chip Emulation Module 256 x 16 Dual-port Mailbox Bus Interface Unit DSP Subsystem AT75C DSP Subsystem 1368C- INTAP- 08/02 AT75C DSP Subsystem Processing Unit A block diagram of the Oak DSPCore architecture is shown in Figure 2. Figure 2. AT75C Oak DSPCore Block Diagram On-core Y-RAM Data Address Arithmetic Unit On-core...