Z16C30_08 Datasheet, PDF (53/102 Pages) Zilog, Inc. – CMOS USC Universal Serial Controller

Z16C30
Product Specification
49
Any Transaction
Up To and Including
BCR W rite
No AS
Reset
At Least One AS
BCR
Write
Transaction
BCR[2]=0
BCR[15]=1
Non-Multiplexed
Bus
BCR[2]=0
BCR[15]=0
BCR[2]=1
Multiplexed
Bus
BCR[2]=0
BCR[15]=1
BCR[2]=0
BCR[15]=0
BCR[2]=1
8-Bit With
Separate
Address
8-Bit Without
Separate
Address
16-Bit
8-Bit With
Separate
Address
Note:
The presence of one transaction with an /AS active between reset, up to
and including the BCR write, chooses a multiplexed type of bus.
8-Bit Without
Separate
Address
16-Bit
Figure 29. BCR Reset Sequence and Bit Assignments
DS007902-0708
PRELIMINARY
Functional Description