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CHAPTER 4
Functional Description
Introduction ................................................................................................................4-1
Summary of Features .................................................................................................4-1
Processor and Memory .......................................................................................4-2
I/O Implementation.............................................................................................4-3
ASICs..................................................................................................................4-4
Block Diagram ...........................................................................................................4-4
Functional Description...............................................................................................4-4
Data Bus Structure ..............................................................................................4-6
Microprocessor ...................................................................................................4-6
MC68xx060 Cache ......................................................................................4-6
No-VMEbus-Interface Option ............................................................................4-7
Memory Options .................................................................................................4-7
DRAM .........................................................................................................4-7
SRAM ..........................................................................................................4-8
About the Battery.........................................................................................4-9
EPROM and Flash Memory ......................................................................4-11
Battery-Backed-Up RAM and Clock................................................................4-11
VMEbus Interface and VMEchip2 ...................................................................4-12
I/O Interfaces ....................................................................................................4-12
Serial Communications Interface ..............................................................4-12
IndustryPack (IP) Interfaces ......................................................................4-15
Ethernet Interface ......................................................................................4-16
SCSI Interface............................................................................................4-17
SCSI Termination ......................................................................................4-17
Local Resources ................................................................................................4-17
Programmable Tick Timers .......................................................................4-17
Watchdog Timer ........................................................................................4-18
Software-Programmable Hardware Interrupts...........................................4-18
Local Bus Timeout ....................................................................................4-18
Local Bus Arbiter..............................................................................................4-19
Connectors ........................................................................................................4-19
Remote Status and Control ........................................................................4-20
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