MT90812
Advance Information
STi0
STi1
EST1
M
U
X
Serial
to
Parallel
Converter
Data
Memory
Gain
Control
Output
Mux
Parallel
to
Serial
Converter
STo0
STo1
EST0
Conference
Connect Memory
FSK and Tone
Generation
Energy Detect
D-channel
TX/RX
Timing
&
Control
PLL
Ring
Frequency
R+
R-
HDLC
Resource
Allocator
HDLC
Controller
CPU
Microprocessor
Interface
Frame Pulses and Clocks
Figure 1 - Functional Block Diagram
C.O.
Trunks
2B+D
2B+D
2B+D
CODEC
2B+D
2B+D
2B+D
2B+D
2B+D
Ports
Local
TDM Bus
2B+D
2B+D
2B+D
2B+D
2B+D
Ports
Analog
Ports
...
Integrated
Digital Switch
-
digital switch
- conferencing
- tone generation
- energy detection
CODEC
MPU Interface
- D-channel
- Chip control
System Expansion bus (TDM)
Figure 2 - System Blocks - Typical Configuration
2
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