MT8920B Mitel Networks Corporation, MT8920B Datasheet - Page 14

• Manufacturer Part Number: MT8920B
• Description: ISO-cmos St-bus Family St-bus Parallel Access Circuit
• Manufacturer: Mitel Networks Corporation

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