viii
PCI Local Bus Memory Map ............................................................................. 2-4
CompactPCI Memory Map ................................................................................ 2-5
PCI Arbitration ................................................................................................... 2-5
Interrupt Handling .............................................................................................. 2-6
DMA Channels................................................................................................... 2-7
Sources of Reset ................................................................................................. 2-7
Endian Issues ...................................................................................................... 2-8
Processor/Memory Domain ........................................................................ 2-8
Role of the Raven ASIC.............................................................................. 2-9
PCI Domain................................................................................................. 2-9
PCI and Ethernet ......................................................................................... 2-9
CHAPTER 3
Functional Description
Introduction ............................................................................................................... 3-1
Features...................................................................................................................... 3-1
General Description ................................................................................................... 3-2
Block Diagram........................................................................................................... 3-4
CompactPCI Interface ........................................................................................ 3-5
Ethernet Interface ............................................................................................... 3-5
PCI Mezzanine Interface .................................................................................... 3-7
PC87307 ISA Super I/O Device (ISASIO) ........................................................ 3-7
Asynchronous Serial Ports .......................................................................... 3-8
Parallel Port/Printer Interface...................................................................... 3-8
Floppy Disk/Tape Drive Controller ............................................................ 3-8
Keyboard and Mouse Interface ................................................................... 3-9
PCI Peripheral Bus Controller (PBC) ................................................................ 3-9
Real-Time Clock/NVRAM/Watchdog Timer Function ................................... 3-10
Programmable Timers ...................................................................................... 3-11
Raven General Purpose Timers................................................................. 3-11
Raven Watchdog Timers........................................................................... 3-11
M48T559 Watchdog Timer....................................................................... 3-12
Interval Timers .......................................................................................... 3-12
16-Bit Timers ............................................................................................ 3-12
Serial Communications Interface ..................................................................... 3-13
Z8536 CIO Device .................................................................................... 3-13
Base Module Feature Register ......................................................................... 3-14
Serial Port Signal Multiplexing ........................................................................ 3-14
Signal Multiplexing (MX)......................................................................... 3-15
ABORT(ABT) Switch (S2) .............................................................................. 3-17
RESET(RST) Switch (S1)................................................................................ 3-17
