MT92220BG Zarlink Semiconductor, MT92220BG Datasheet - Page 2

• Manufacturer Part Number: MT92220BG
• Description: Description = 1023 Channel Voice Over IP/AAL2 Processor ;; Package Type = Epbga ;; No. Of Pins = 608
• Manufacturer: Zarlink Semiconductor

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Applications
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Description
The MT92220 device is a voice over IP/RTP assembly and disassembly engine that can convert up to 1023 full-
duplex PCM voice channels or 4096 HDLC channels to IP packets and back, conforming to IETF RFC791 (IPv4),
RFC2460 (IPv6), RFC768 (UDP) and RFC1889 (RTP). It can also perform AAL2 encapsulation and de-
encapsulation conforming to ITU I.363.2. On one side, the device communicates with an H.110 TDM bus carrying
voice in either PCM format, ADPCM or HDLC-encapsulated mini-packets; on the other side, it carries its packet
data over Ethernet, ATM (using AAL5 cells) or Packet over SONET or, in the case of AAL2, over ATM. A 16-bit
Intel/Motorola CPU interface is used to access and configure the device. Finally, three external SSRAM banks and
one external SDRAM bank are used for configuration and storage space.
Conventions
In this document, the following conventions are used:
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Proprietary Adaptive Silence Suppression
Less than 2.5 watts of power
608 pin PBGA package
High density voice gateway
Voice over IP and/or AAL2
3G and UMTS
Network processor
IP and/or AAL2 switching
Voice over DSL/cable
The transmission direction and the abbreviation TX always refer to the direction in which voice is converted
into IP packets or AAL2 cells.
The reception direction and the abbreviation RX refer to the direction in which packets or cells are converted
into PCM bytes or HDLC packets.
All numbers in this document are decimal unless otherwise specified.
Hexadecimal number can be identified by the ‘h’ suffix (ex: A5h).
Binary numbers are either in double quotes for multiple bits or in single quotes for individual bits (ex: “1001”,
‘0’).
The term “byte” means 8 bits.
The term “word” means 16 bits.
The term “dword” means 32 bits.
The word “high” means a binary value of ‘1’.
The word “low” means a binary value of ‘0’.
The verb “to clear” means to reset one or multiple bits to ‘0’
The verb “to set” means to put one or multiple bits to ‘1’.
All addresses are specified in hexadecimal and point to bytes. Addresses are converted from bytes to words
to double words using the little endian format, unless otherwise specified.
Zarlink Semiconductor Inc.