bcm1112 Broadcom Corp., bcm1112 Datasheet - Page 2

• Manufacturer Part Number: bcm1112
• Description: Bcm1112 - Voip Cpe Engine
• Manufacturer: Broadcom Corp.

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
• ZSP 108 MHz DSP with 48K instruction and 32K data RAM. The
• Analog Codecs. Three ADCs and DACs are integrated, eliminating
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1112-PB02-R
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.
DSP supports a wide range of vocoders, fax modems, and a variety
of telephony algorithms (e.g., DTMF and Call Progress Tones).
the need for an analog switch to allow the sharing of a codec between
multiple interfaces.
®
, the pulse logo, Connecting everything
02/23/05
Watchdog
Analog Processor Module
Timer
Auto-MDIX Phy
Auto-MDIX Phy
10BT/100BT
10BT/100BT
CODEC Channel 1
Uart 0
®
CODEC Channel 2
CODEC Channel 3
16-bit D/A
16-bit D/A
Timers
Uart 1
®
, and the Connecting everything logo are among the
18 GPIOs
Peripheral Bus
MIPS JTAG
port 0
port 1
Ethernet LED
Driver
Program
Memory
Memory
Controller
Interrupt
External
48 KB
32 KB
Data
O V E R V I E W
Ethernet
Switch
3 Port
+ 4K D-Cache
MIPS32 CPU
64KB Buffer
+ 8K I-Cache
Memory
ZSP JTAG
18 GPIOs
ZSP DSP
• 10/100BASE-T Ethernet Switch, Media Access Controllers, and
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.
port 2
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.
Arbiter
Bridge
DMA
IPB
External Bus
Speed
Speed
Port 2
Port 1
IOM-2
Serial
Serial
High
High
TDM
Interface
Interface
Port
SDRAM
50 MHz
EPROM
SDRAM
Flash/
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