MC68EC000 Motorola, MC68EC000 Datasheet - Page 69

• Manufacturer Part Number: MC68EC000
• Description: Core Processor (SCM 68000)
• Manufacturer: Motorola

Bus Operation
3-28
UDSB and/or LDSB
SIZ1–SIZ0
FC2–FC0
BGACKB
DTACKB
D15–D0
A31–A0
TSCAE
ERWB
RMCB
COEB
AOEB
DOEB
RWB
CLKI
BRB
BGB
DSB
ASB
Figure 3-23. 2-Wire Bus Arbitration Timing Diagram—Bus Inactive
BUS RELEASED FROM THREE STATE AND PROCESSOR STARTS NEXT BUS CYCLE
BRB NEGATED
BGB ASSERTED AND BUS THREE STATED
BRB VALID INTERNAL
BRB SAMPLED
BRB ASSERTED
S0 S1 S2 S3 S4 S5 S6 S7
PROCESSOR
Freescale Semiconductor, Inc.
EC000 CORE PROCESSOR USER’S MANUAL
For More Information On This Product,
Go to: www.freescale.com
INACTIVE
BUS
ALTERNATE BUS MASTER
S0 S1 S2 S3 S4
MOTOROLA
PROCESSOR