AT75C Datasheet, PDF (1/171 Pages) ATMEL Corporation – Smart Internet Appliance Processor (SIAP)

Features
• Fully Autonomous DSP System
• 16-bit Fixed-point OakDSPCore^®
• 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
• Communication with External Processor through Dual-port Mailbox
Description
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.
Smart Internet
Appliance
Processor
(SIAP^™)
AT75C
DSP Subsystem
Rev. 1368C–INTAP–08/02
1