BCM1112 Просмотр технического описания (PDF) - Broadcom Corporation
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BCM1112 Datasheet PDF : 2 Pages
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OVERVIEW
Uart 0 Uart 1
18 GPIOs
External
Interrupt
Controller
18 GPIOs
Peripheral Bus
Watchdog
Timer
Timers
MIPS JTAG
MIPS32 CPU
+ 8K I-Cache
+ 4K D-Cache
Analog Processor Module
CODEC Channel 3
CODEC Channel 2
CODEC Channel 1
16-bit D/A
16-bit D/A
48 KB
Program
Memory
32 KB
Data
Memory
ZSP JTAG
ZSP DSP
10BT/100BT
Auto-MDIX Phy
10BT/100BT
Auto-MDIX Phy
port 0
port 1
3 Port
Ethernet
Switch
port 2
IPB
Bridge
High
Speed
Serial
Port 2
High
Speed
Serial
Port 1
TDM
IOM-2
Port
50 MHz
External Bus
Interface
SDRAM
Interface
Ethernet LED
Driver
64KB Buffer
Memory
DMA
Arbiter
Flash/
EPROM
SDRAM
The Broadcom BCM1112 represents a new level of integration for
Ethernet Residential Gateway and Stand-Alone Media Terminal Adapter
applications.
Key modules integrated in the BCM1112 include:
• MIPS32 150 MHz processor with 8K 2-way set associative I-cache
and a 4K 2-way associative D-cache. This MCU supports the VoIP
protocol stacks, jitter buffer management, and application program.
Programming is done in C, on top of Broadcom's object-oriented
signal processing API.
• ZSP 108 MHz DSP with 48K instruction and 32K data RAM. The
DSP supports a wide range of vocoders, fax modems, and a variety
of telephony algorithms (e.g., DTMF and Call Progress Tones).
• Analog Codecs. Three ADCs and DACs are integrated, eliminating
the need for an analog switch to allow the sharing of a codec between
multiple interfaces.
• 10/100BASE-T Ethernet Switch, Media Access Controllers, and
Transceivers. The three-port Ethernet switch integrates three full-
duplex capable Media Access Controllers (MACs), a Serial
Management Port, an address resolution engine, a non-blocking
switch controller, 64K of internal switch memory, 802.1p
prioritization for voice packets, 802.1Q VLAN tagging support for
segmenting physical networks into multiple logical networks, and a
set of Management Information Base (MIB) statistics registers. The
two transceivers perform all of the functions for 100BASE-T
Ethernet in full- or half-duplex mode over Category (CAT) 5 twisted
pair cable and 10BASE-T Ethernet in full- or half-duplex mode over
CAT 3, 4, or 5 twisted pair cable. They support Auto MDI/MDIX
detection to allow the use of any cable type in either port. The
transceivers also integrate support for in-line powering over Ethernet.
The BCM1112 integrates all the key silicon components of an Ethernet
IP Gateway into a single device, thereby reducing the overall system cost
and complexity of Terminal Adapter products, while at the same time
increasing their voice quality and the reliability of the network to which
they are attached.
Broadcom®, the pulse logo, Connecting everything®, and the Connecting everything logo are among the
trademarks of Broadcom Corporation and/or its affiliates in the United States, certain other countries and/
or the EU. Any other trademarks or trade names mentioned are the property of their respective owners.
®
BROADCOM CORPORATION
16215 Alton Parkway, P.O. Box 57013
Irvine, California 92619-7013
© 2004 by BROADCOM CORPORATION. All rights reserved.
1112-PB02-R
02/23/05
Phone: 949-450-8700
Fax: 949-450-8710
E-mail: info@broadcom.com
Web: www.broadcom.com
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