
Board Level Overview
VMEchip2 ASIC
Provides the VMEbus interface. The VMEchip2 includes:
❏Two tick timers
❏Watchdog timer
❏Programmable map decoders for the master and slave interfaces, and a VMEbus to/from local bus DMA controller
❏VMEbus to/from local bus
❏VMEbus interrupter
❏VMEbus system controller
❏VMEbus interrupt handler
❏VMEbus requester
Table 2-2. Bus Transfers
Transfer type | Can be... |
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D8, D16, or D32 | |
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VMEchip2 DMA to the | D16, D32, D16/BLT, |
VMEbus | D32/BLT, or D64/MBLT |
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PCCchip2 ASIC
The PCCchip2 ASIC provides two tick timers and the interface to the:
❏LAN chip
❏SCSI chip
❏Serial port chip
❏Printer port
❏BBRAM
2 |