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ML7204-001

VoIP CODEC

Oki Electric Industry 

OKI Semiconductor

ML7204-001

VoIP CODEC

FEDL7204-001DIGEST-01

Issue Date: Aug. 12, 2004

GENERAL DESCRIPTION

The ML7204-001 is a speech CODEC for VoIP. As a speech CODEC, this LSI allows selection of

G.729.A/G711 and supports the PLC (Packet Loss Concealment) function.

With an echo canceler that handles 32 ms-delay and FSK detection/generation, DTMF detection/generation, and

tone detection/generation functions, the ML7204-001 is the most suitable LSI for adding the VoIP function to

TAs and routers.

FEATURES

• Power supply voltage

Digital power supply voltage (DVDD0, 1, 2): 3.0 to 3.6 V

Analog power supply voltage (AVDD):

3.0 to 3.6 V

• Speech CODEC:

G.729.A (8 kbps)/G.711 (64 kbps) µ-law and A-law (supports individual setting for transmission and

reception)

Supports ITU-T G.711 Appendix 1 compliant PLC (Packet Loss Concealment) function

Supports the 2-channel processing function (for 3-way communication)

• Built-in FIFO buffer (640 bytes) for transmission/reception data transfer

Allows selection of Frame/DMA (slave) interface

• Echo canceler for handling 32 ms delay

• DTMF detection

• DTMF generation (the tone generation function enables generation of DTMF signals)

• Tone detection:

2 types (1650 Hz and 2100 Hz: Detection frequency can be changed)

• Tone generation:

2 types

• FSK detection

• FSK generation

• Built-in 16-bit timer:

1 channel

• Dial pulse detection function (secondary function of general-purpose I/O ports)

• Dial pulse transmission function (secondary function of general-purpose I/O ports)

• General-purpose I/O ports

64-pin package: Equipped with 7 ports (with some of them having secondary function allocation)

100-pin package: Equipped with 21 ports (with some of them having secondary function allocation)

• Two types of built-in linear PCM CODEC (CODEC_A and CODEC_B)

• Analog interface

CODEC_A side: Incorporates one type each of input amplifier and output amplifier (10 kΩ driving)

CODEC_B side: Incorporates one type each of input amplifier and output amplifier (10 kΩ driving)

• PCM interface coding format:

Allows selection of 16-bit linear/G.711 (64 kbps) µ-law or A-law

• PCM serial transmission rate: 64 kHz to 2.048 MHz (fixed to 2.048 MHz for output)

• PCM time slot assignment function (allows up to 2 slots for input and 1 slot for output individually)

When set to µ-law/A-law: Supports up to 32 slots (BCLK: 2.048 MHz)

When set to 16-bit linear: Supports up to 16 slots (BCLK: 2.048 MHz)

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