GENERAL DESCRIPTION

STMicroelectronics’ STLC1502 is a high performance VoIP processor specially targeted for the time effective design of IP-Phones and analog gateway applications bundled with a comprehensive embedded software solution.

The main characteristics of the STLC1502 IP processor are as follows:

? HCMOS7 technology

? Power supply: Core 2.5 V and I/O: 3.3 V

? Industry standard 32-bit RISC microprocessor (ARM7/TDMI core)

? 16-bit, fixed point 120 MIPs DSP (D950)

? Two 10/100 Base-T Ethernet MACs

? VLAN support

? Ethernet Bridge

? JTAG

? Smart power management

REFERENCE SOFTWARE FEATURES

Some of the features of the SW provided are:

ARM7/TDMI

? Industry standard Real time OS: VxWorks

? Network Protocol Stack

? TCP/IP, UDP, TFTP, DHCP, HTTP server

? Ethernet/PC communication drivers

? High Level Chip Control

? Stack management

? SNMP (optional)

? Application Specific MIBS

? Signalling Protocol

? MGCP, H.323 (including H.450), SIP

D950 Voice Codec Unit (VCU) features:

? G.711 Packetized PCM

? G.729AB, 8kbps CS-ACELP

? G.726, 16-40 kbps ADPCM

? G.723.1a, 6.3/5.3 kbps MP-MLQ

? Encoding and decoding of PCM sample frames

? Packing/unpacking of compressed information in Codewords

? Fax Modem : T.38 Fax Relay, V.21, V.17, V.27ter and V.29 fax datapump

? Data Modem: V.34 datapump

? Rate selection

? High performance voice activity detector (VAD)

? Comfort noise generator (CNG)

? G.165 32 ms Line & acoustic echo canceller

? Low latency system implementation