AM79C2031JC AMD (ADVANCED MICRO DEVICES), AM79C2031JC Datasheet - Page 14

• Manufacturer Part Number: AM79C2031JC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM79C2031JC

• Lead Free Status / RoHS Status: Supplier Unconfirmed

The PCM data can be either 8-bit companded A-law
code, 8-bit companded µ-law code, or 16-bit linear
code. Voice data is transmitted and received via the
PCM highway; control information is written to and read
from the ASLAC/ASLIC devices chipset over the
microprocessor interface.
Besides the CODEC functions, the ASLAC device
provides all the sensing, feedback, and clocking
necessary to completely control ASLIC device
functions with programmable parameters. The line
status is continuously available in the ASLAC Device
Signaling Register, which is continuously available via
the MPI interface, or on the PCM highway via a user-
programmable mode. A programmable interrupt
provides added flexibility in monitoring line status.
System-level parameters under programmable control
include active and disable loop-current limits, feed
resistance, and apparent battery-feed voltage. The
longitudinal operating point is programmable to
optimize the ASLIC device signal swing capability.
14
Am79213/Am79C203/031 Data Sheet
P R E L I M I N A R Y
The ASLAC device provides signals at 12 or 16 kHz
for metering functions. The frequency and level of
these signals are programmable.
The
supervision capability, including off-hook, ring-trip, and
ground-key detection. Detection thresholds for these
functions
debounce timer is available that eliminates false
detection due to contact bounce. For subscriber line
diagnostics, AC and DC line conditions can be
monitored using special test modes. Results are read
using the MPI commands.
ASLAC
are
device
programmable.
provides
A
extensive
programmable
loop