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ASICs..................................................................................................................4-3
Block Diagram ...........................................................................................................4-4
Functional Description...............................................................................................4-4
Data Bus Structure ..............................................................................................4-4
Microprocessor ...................................................................................................4-6
MC68xx040 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 ......................................................................4-10
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 ......................................................................4-16
Ethernet Interface ......................................................................................4-16
SCSI Interface............................................................................................4-17
SCSI Termination ......................................................................................4-17
Local Resources................................................................................................4-18
Programmable Tick Timers .......................................................................4-18
Watchdog Timer ........................................................................................4-18
Software-Programmable Hardware Interrupts...........................................4-19
Local Bus Timeout ....................................................................................4-19
Local Bus Arbiter..............................................................................................4-20
Connectors ........................................................................................................4-20
Remote Status and Control ........................................................................4-20
CHAPTER 5
Pin Assignments
Connector Pin Assignments .......................................................................................5-1
IndustryPack A, B, C, D Connectors .........................................................................5-1
Remote Reset Connector - J6.....................................................................................5-3
Serial Port Module Connector - J15...........................................................................5-3
Serial Port 2 Connector - J18 .....................................................................................5-4
Serial Port 1/Console Connector - J25.......................................................................5-5
VMEbus Connectors - P1, P2 ....................................................................................5-6
ix
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