Rainbow Electronics AT75C320 - Manual (Page 6)

6
AT75C320
1769A–07/01
Figure 2. DSP Subsystem Block Diagram
Application Example
Figure 3. Standalone Internet Telephone
24K x 16
Program RAM
OakDSPCore
16K x 16
General-
purpose RAM
256 x 16
Dual-port
Mailbox
On-chip
Emulation
Module
2K x 16 X-RAM
2K x 16 Y-RAM
Codec Interface
Bus Interface Unit
DSP Subsystem
ASB
Oak Program Bus Oak Data Bus
VolP
Protocol
Stack
ARM7TDMI Core
External Bus
Interface
SDRAM
Controller
SRAM
Controller
SDRAM
Flash
Line
Interface
Data
Codec
Speaker
Phone
Interface
Voice
Codec
V.34
Modem
DSP Subsystem
Voice
Processing
DSP Subsystem
Analog Front-End
AT75C320
Keyboard Screen
Line
Speaker
Microphone
Handset