APPLICATIONS

„ CO

„ DLC

„ IVD

„ Voice-enabled DSLAM

„ PBX/KTS

„ Test head

„ Pair gain

FEATURES

„ Software interface using VP API-II

„ Software downloadable, field upgradeable, expandable

„ Provides expanded line and circuit testing in

conjunction with Legerity’s VE790 Series chip sets

„ DTMF detection (Q.24, up to 16 channels

simultaneously)

„ Quad tone and howler tone generation

„ Arbitrary single tone detection

„ 15-kHz energy detection

„ SNR tests

„ Dial pulse measurement

„ Aggregated codec/filter control lowers demand on

host micro-processor

„ Master MPI port to the Legerity SLAC™ device

„ Slave PCM port can be used as an alternative

„ Internal PLL and timing circuits with programmable

dividers

„ Serial and parallel controller interface options

„ 16 I/Os to support controlling up to 32 lines

„ 3.3-V compliant I/O; Internal 3.3-V to 2.5-V linear

regulator for the core logic

DESCRIPTION

The Le79112 VoiceEdge™ Control Processor (VCP) is a digital

signal processing platform that works with the Legerity VE790

series chip sets using the MPI interface, PCM port, and an

interrupt line from the codec/filter. The primary functions of the

Le79112 VCP are to program and control the codec/filter to

implement enhanced call control and test capabilities.

The Le79112 VCP, in combination with the VE790 series chip

set, supports up to 32 channels of universal telephone line

interface with higher level voice functionality. This enables the

design of a low-cost, high-performance, fully software

programmable line interface for multiple country applications.

All AC, DC, signaling parameters, and data are fully

programmable. Additionally, the Le79112 VCP has integrated

self-test and line-test capabilities to resolve faults to the line or

line circuit. The integrated test capability is crucial for remote

applications where dedicated test hardware is not cost

effective.

The Le79112 VCP is compatible with Le79Q2281, Le79Q2284,

and Le792288 ISLAC devices.