MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 331

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

9.5.7 Address Transfer Phase Signals
MPC555
USER’S MANUAL
Address transfer phase signals include the following:
Transfer attributes signals include RD/WR, BURST, TSIZ[0:1], AT[0:3], STS, and
BDIP. With the exception of the BDIP, these signals are available at the same time as
the address bus.
• Transfer start
• Address bus
• Transfer attributes
/
MPC556
BR
MPC555 /
MPC556
No Longer
Needs the Bus
External Device With Higher
Priority than the Current Internal
Bus Master Requests the Bus
= 1
BG
BB
Figure 9-26 Internal Bus Arbitration State Machine
IDLE
= t.s
External Master
Requests Bus
= 1
BR = 0
EXTERNAL BUS INTERFACE
MCU Needs
the Bus
Ext Master
Release Bus
Rev. 15 October 2000
MPC555 /
MPC556
External
Owner
BG
BB
Owner
BG
BB
= t.s
= 0
= 0
= 1
Priority than the External Device
Requires the Bus
Internal Master With Higher
MPC555 / MPC556
MPC555 /
MPC556
Still Needs
the Bus
BB
= 1
Bus
MPC555 /
MPC556
BG
BB
Wait
= t.s
= 1
BB
= 0
MOTOROLA
9-35