MC68306 Motorola, MC68306 Datasheet - Page 51

• Manufacturer Part Number: MC68306
• Description: Integrated EC000 Processor
• Manufacturer: Motorola

Figures 3-18, 3-19, and 3-20 apply to processors using 3-wire bus arbitration. Figures
3-21, 3-22, and 3-23 apply to processors using 2-wire bus arbitration.
MOTOROLA
FC2–FC0
D15–D0
BGACK
A31–A1
DTACK
Figure 3-18. Three-Wire Bus Arbitration Timing Diagram—Processor Active
UDS
R/W
LDS
CLK
BR
BG
AS
BUS THREE-STATED
BG ASSERTED
BR VALID INTERNAL
BR SAMPLED
BR ASSERTED
S0 S1 S2 S3 S4 S5 S6 S7
PROCESSOR
MC68306 USER'S MANUAL
BUS RELEASED FROM THREE STATE AND
PROCESSOR STARTS NEXT BUS CYCLE
BGACK NEGATED INTERNAL
BGACK SAMPLED
BGACK NEGATED
ALTERNATE BUS MASTER
S0 S1 S2 S3 S4 S5 S6 S7 S0 S1
PROCESSOR
3- 19