the bus interface unit prefetches instructions from memory and store them in piq.
the bus interface unit prefetches instructions from memory and store them in piq.
the bus interface unit prefetches instructions from memory and store them in?
piq
the implementation of a pipeline architecture is possible only if the bus interface unit and the execution unit are independent. while the execution unit is decoding or executing an instruction which does not require the use of the data and address buses, the bus interface unit fetches instruction opcodes from the memory.









































this process is much faster than sending out an address, reading the opcode and then decoding and executing it. fetching the next instruction while the current instruction is being decoded or executed is called pipelining.
prefetch input queue
each external bus transceiver (driver/receiver) ic is recommended to connect via 180 ω protection resistors against both bus+ and bus- line.









































section::::iebus-enabled ics.:bus interface transceiver ics.:r2a11210sp (non promotion); by renesas.









































r2a11210sp









































is a bus interface transceiver (driver/receiver) ic for iebus with typically 30 mv hysteresis comparator input.









































section::::iebus-enabled ics.:bus interface transceiver ics.:ha12187fp (non promotion); by renesas, formerly hitachi.









































ha12187fp









































is a bus interface transceiver (driver/receiver) ic suitable for iebus.









































section::::iebus-enabled ics.:bus interface transceiver ics.:ha12240fp (current, as of 2018); by renesas, formerly hitachi.









































ha12240fp









































is a bus interface transceiver (driver/receiver) ic for iebus with hysteresis comparator input.
iebus