user manual
Board Level Overview
2-9
2
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 non-DMA programmed access
interface
❏ VMEbus interrupter
❏ VMEbus system controller
❏ VMEbus interrupt handler
❏ VMEbus requester
PCCchip2 ASIC
The PCCchip2 ASIC provides two tick timers and the interface to
the:
❏ LAN chip
❏ SCSI chip
❏ Serial port chip
❏ Printer port
❏ BBRAM
Table 2-2. Bus Transfers
Transfer type Can be...
Processor-to-VMEbus D8, D16, or D32
VMEchip2 DMA to the
VMEbus
D16, D32, D16/BLT,
D32/BLT, or D64/MBLT