28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 14

• Manufacturer Part Number: 28478G-18
• Description: Multichannel Synchronous Communications Controller 208-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of 28478G-18

• Package: 208BGA
• Maximum Data Rate: 32768 Kbps
• Transmission Media Type: Wire
• Power Supply Type: Analog
• Typical Supply Current: 250 mA
• Typical Operating Supply Voltage: 3.3 V
• Minimum Operating Supply Voltage: 3 V
• Maximum Operating Supply Voltage: 3.6 V

The Mindspeed MUSYCC is a high-throughput communications controller for synchronous, link-layer applications
that multiplexes and demultiplexes up to 256 data channels. Each channel can be configured to support HDLC,
Transparent, or SS7 applications. MUSYCC operates at the Layer 2 (the data link protocol level) reference of the
International Organization for Standardization (ISO) Open Systems Interconnection (OSI). MUSYCC is installed
between the multiple serial interface devices and the shared buffer memory of one or more host processors.
MUSYCC’s serial ports interface to a standard Pulse Code Modulation (PCM) highway, which operates at T1, E1,
2xE1, or 4xE1 rates. Data can be formatted in the HDLC protocol or left unformatted. The protocol is specified on a
per-channel and direction basis.
An on-device Peripheral Components Interface (PCI) controller, known as the host interface, is provided. Access to
MUSYCC is available thration cycles (see
Figure 1-1.
28478-DSH-002-E
System Block Diagram
8478_001
Memory
System
System
Host
Components
Memory
Local
Optional
Host
Local
Preliminary Information / Mindspeed Proprietary and Confidential
1.0 System Description
Bridge
Local
Bus
PCI
Mindspeed Technologies
EBUS
Figure
MUSYCC
Expansion
Interface
Interface
JTAG
(PCI)
Host
Bus
1-1).
Interface 0
Interface 1
Interface 2
Interface 3
Interface 4
Interface 5
Interface 6
Interface 7
Serial
Serial
Serial
Serial
Serial
Serial
Serial
Serial
®
Interface 0
Interface 1
Interface 2
Interface 3
Interface 4
Interface 5
Interface 6
Interface 7
Physical
Physical
Physical
Physical
Physical
Physical
Physical
Physical
1