28478G-18 Mindspeed Technologies, 28478G-18 Datasheet - Page 60

• 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

MUSYCC provides a PCI bridge to a local bus interface on MUSYCC called the Expansion Bus (EBUS). The
EBUS provides a host processor across the PCI bus to access up to 1 MB of peripheral memory space on the
EBUS.
Although EBUS utilization is optional, the most notable application for the EBUS is the connection to peripheral
devices (e.g., Bt8370 T1/E1 framers) local to MUSYCC’s serial port.
of the EBUS interface with and without local Multiprocessor Unit (MPU).
Figure 3-1.
28478-DSH-002-E
EBUS Functional Block Diagram with Local MPU
8478_007
Preliminary Information / Mindspeed Proprietary and Confidential
Address/Data
3.0 Expansion Bus (EBUS)
Interrupt
Clock
Mindspeed Technologies
Regenerated
Interface
Inverted
EBUS
and
Arbiter
Bus
Bus Arbitration
Address/Data
Control
EINT*
Clock
®
Figures 3-1
Expansion
Local
Bus
and
3-2
Motorola
Framer
Bt8370
T1/E1
MPU
Intel
illustrate block diagrams
47