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