MC68306 Motorola, MC68306 Datasheet - Page 46

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

PROCESSOR
REQUESTING DEVICE
REQUEST THE BUS
1) ASSERT BUS REQUEST (BR)
GRANT BUS ARBITRATION
1) ASSERT BUS GRANT (BG)
OPERATE AS BUS MASTER
1) EXTERNAL ARBITRATION DETER-
MINES NEXT BUS MASTER
2) NEXT BUS MASTER WAITS FOR
CURRENT CYCLE TO COMPLETE
ACKNOWLEDGE RELEASE OF
RELEASE BUS MASTERSHIP
BUS MASTERSHIP
1) NEGATE BUS REQUEST (BR)
1) NEGATE BUS GRANT (BG)
REARBITRATE OR RESUME
PROCESSOR OPERATION
Figure 3-13. Two-Wire Bus Arbitration Cycle Flowchart
3-14
MC68306 USER'S MANUAL
MOTOROLA