Artesyn MVME55006E Single Board Computer Installation and Use (July 2014) - Manual (Page 51)

Functional Description
MVME55006E Single Board Computer Installation and Use (6806800A37J) 51
2.6.3 Interrupt Controller
The MVME5500 uses the interrupt controller integrated into GT-64260B to manage the GT-
64260B internal interrupts, as well as the external interrupt requests. The external interrupt
sources include the following:
 On-board PMC interrupts
 LAN interrupts
 VME interrupts
 RTC interrupt
 Watchdog timer interrupts
 Abort switch interrupt
 External UART interrupts
The interrupt controller provides up to seven interrupt output pins for various interrupt
functions. For additional details regarding the external interrupt assignments, refer to the
MVME5500 Single-Board Computer Programmer’s Reference Guide.
2.6.4 I2C Serial Interface and Devices
A two-wire serial interface for the MVME5500 board is provided by a master/slave capable I2C
serial controller integrated into the GT-64260B device. The I2C serial controller provides two
basic functions. The first function is to optionally provide GT-64260B register initialization
following a reset. The GT-64260B can be configured (by setting jumper J17) to automatically
read data out of a serial EEPROM following a reset and initialize any number of internal registers.
In the second function, the controller is used by the system software to read the contents of the
VPD EEPROM contained on the MVME5500 board, along with the SPD EEPROM(s), to further
initialize the memory controller and other interfaces.
The MVME5500 board contains the following I2C serial devices:
 256 byte EEPROM for fixed GT-64260B initialization
 8KB EEPROM for VPD
 8KB EEPROM for user-defined VPD