MC68HC000EI20 Freescale Semiconductor, MC68HC000EI20 Datasheet - Page 58

• Manufacturer Part Number: MC68HC000EI20
• Description: IC MPU 16BIT 20MHZ 68-PLCC
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC000EI20

• Processor Type: M680x0 32-Bit
• Speed: 20MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

5-12
1) NEGATE BG (AND WAIT FOR BGACK
1) ASSERT BUS GRANT (BG)
TO BE NEGATED)
TERMINATE ARBITRATION
REARBITRATE OR RESUME
GRANT BUS ARBITRATION
PROCESSOR OPERATION
PROCESSOR
Figure 5-13. 3-Wire Bus Arbitration Cycle Flowchart
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
(Not Applicable to 48-Pin MC68008 or MC68EC000)
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
1) PERFORM DATA TRANSFERS (READ
1) EXTERNAL ARBITRATION DETER-
2) NEXT BUS MASTER WAITS FOR
3) NEXT BUS MASTER ASSERTS BUS
4) BUS MASTER NEGATES BR
1) ASSERT BUS REQUEST (BR)
1) NEGATE BGACK
ACKNOWLEDGE BUS MASTERSHIP
AND WRITE CYCLES) ACCORDING
TO THE SAME RULES THE PRO-
CESSOR USES
MINES NEXT BUS MASTER
CURRENT CYCLE TO COMPLETE
GRANT ACKNOWLEDGE (BGACK)
TO BECOME NEW MASTER
OPERATE AS BUS MASTER
RELEASE BUS MASTERSHIP
REQUESTING DEVICE
REQUEST THE BUS
MOTOROLA