MT8920B CMOS
Digital Signal Processor to ST-BUS Interface
-
-
-
-
-
-
-
-
-
-
-
Digital Filtering
Voice Conferencing
Speech/Data Compression
Encryption
Mode 2 allows many high speed devices to be easily
connected to the ST-BUS. Figure 12 shows a
TMS32020 digital signal processor interfaced to the
ST-BUS through the STPA. This simple interface
allows complex functions to be implemented in such
systems as PBX’s and computer systems. Some of
the possible functions include:
Tone Detection and Generation
Frequency Spectrum Analysis
Image Processing
µ-Law to A-Law Conversion
Echo Cancellation
Modulation
Speech Synthesis and Recognition
74HCT
138
TMS32020
MT8920B
DS
E2
A9
A8
A7
A6
E1
A
B
C
CS
STo0
A8-A0
D7-D0
A5-A0
STi0
D7-D0
STo1
STRB
RW
OE
WE
MSC
READY
MMS MS1 24/32
+5V +5V
Figure 12 - ST-BUS to DSP Interface
3-16
MITEL [ MITEL NETWORKS CORPORATION ]
