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.