Motorola M68000 User Manual page 66

BUS THREE-STATED
BG ASSERTED
BR VALID INTERNAL
BR SAMPLED
BR ASSERTED
CLK
S0
BR
BG
BGACK
FC2–FC0
A23–A1
AS
UDS
LDS
R/W
DTACK
D15–D0
PROCESSOR
Figure 5-21. 3-Wire Bus Arbitration Timing Diagram—Special Case
5-20 M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
Freescale Semiconductor, Inc.
BUS RELEASED FROM THREE STATE AND
PROCESSOR STARTS NEXT BUS CYCLE
BGACK NEGATED INTERNAL
BGACK SAMPLED
BGACK NEGATED
S2 S4 S6
ALTERNATE BUS MASTER
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S0 S2 S4 S6 S0
PROCESSOR
MOTOROLA