MPC564EVB Freescale Semiconductor, MPC564EVB Datasheet - Page 374

• Manufacturer Part Number: MPC564EVB
• Description: KIT EVAL FOR MPC561/562/563/564
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC564EVB

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC56x
• Data Bus Width: 32 bit
• Interface Type: RS-232, Ethernet
• For Use With/related Products: MPC561, 562, 563, 564
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

External Bus Interface
9.5.7.3
BB assertion indicates that the current bus master is using the bus. New masters should not begin transfer
until this signal is negated. The bus owner should not relinquish or negate this signal until the transfer is
complete. To avoid contention on the BB line, the master should three-state this signal when it gets a
logical one value. This requires the connection of an external pull-up resistor to ensure that a master that
acquires the bus is able to recognize the BB line negated, regardless of how many cycles have passed since
the previous master relinquished the bus. Refer to
9-34
MPC500 Device
(Slave 1)
Bus Busy
Figure 9-25. Master Signals Basic Connection
MPC561/MPC563 Reference Manual, Rev. 1.2
External Bus
TS
BB
Figure
9-25.
Slave 2
Freescale Semiconductor
Master