MC68EC000 Motorola, MC68EC000 Datasheet - Page 65

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

Bus Operation
3-24
UDSB and/or LSDB
SIZ1–SIZ0
FC2–FC0
BGACKB
DTACKB
D15–D0
A31–A0
TSCAE
ERWB
Figure 3-19. 3-Wire Bus Arbitration Timing Diagram—SCM68000 Active
AOEB
COEB
RMCB
DOEB
RWB
BRB
BGB
ASB
DSB
CLKI
BUS THREE-STATED
BGB ASSERTED
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
BUS RELEASED FROM THREE STATE AND
PROCESSOR STARTS NEXT BUS CYCLE
BGACKB NEGATED INTERNAL
BGACKB SAMPLED
BGACKB NEGATED
ALTERNATE BUS MASTER
S0 S1 S2 S3 S4 S5 S6 S7 S0 S1
PROCESSOR
MOTOROLA