RS8973 Mindspeed Technologies, RS8973 Datasheet - Page 31

• Manufacturer Part Number: RS8973
• Description: Single-chip Sdsl/hdsl Transceiver
• Manufacturer: Mindspeed Technologies

RS8973
Single-Chip SDSL/HDSL Transceiver
Figure 2-4. Digital Front-End Block Diagram
N8973DSD
2.2.3.1 Digital
Echo-Free
from NEC
Front-End
ADC Data
Signal
Overflow
Detector
Overflow Monitor
Prior to the main signal processing, the input signal must be adjusted for any DC
offset. The front-end module also monitors the input signal level, which includes
measuring DC and AC input signal levels, detecting and counting overflows, and
detecting alarms based on the far-end signal level.
features of the digital front-end module.
DC Offset
from MCI
Accumulator
+
Level Meter
Absolute
Register
Far-End
Result
Value
Overflow
–
Register
Counter
Preliminary Information
Result
Accumulator
DC Level
Register
Meter
Result
Conexant
High Threshold
Low Threshold
from MCI
from MCI
Accumulator
Signal Level
Absolute
Register
Result
Meter
Value
r, To EC
Comparator
Comparator
Far-End
Alarms
Figure 2-4
2.0 Functional Description
summarizes the
high_felm
Interrupt
low_felm
Interrupt
2.2 Receive Section
2-7