Emerson MVME55006E, Installation And Use Manual

Page: 48 / 146

Functional Description
MVME55006E Single Board Computer Installation and Use (6806800A37H )
48
2.6 System Controller
The GT-64260B system controller for PowerPC architecture processors is a single chip solution
that provides the following features:

A 64-bit interface to the CPU bus

A 64-bit SDRAM interface

A 32-bit generic device interface for Flash, etc.

Two 64-bit, 66 MHz PCI bus interfaces

Three 10/100Mb Ethernet MAC ports (two ports not used)

A DMA engine for moving data between the buses

An interrupt controller

An I2C device controller

PowerPC bus arbiter

Counter/timers

Watchdog timer
Each of the device buses are de-coupled from each other, enabling concurrent operation of the
CPU bus, PCI buses and access to SDRAM. Refer to the
GT-64260B System Controller for PowerPC
Processors Data Sheet , listed in Appendix C, Related Documentation , for more details.
2.6.1 CPU Bus Interface
The GT-64260B supports MPX or 60x bus mode operation. The MVME5500 board has
jumper/build option resistors to select either operating mode at power-up.
2.6.2 Memory Controller Interface
The GT-64260B can access up to four banks of SDRAM for a total of 1GB of SDRAM memory.
The memory bus is capable of operating up to 133 MHz.
The MVME5500 board has two banks on board and a connector for an expansion mezzanine
board with two additional banks.