MPC561MZP56 Freescale, MPC561MZP56 Datasheet - Page 376

• Manufacturer Part Number: MPC561MZP56
• Manufacturer: Freescale

Specifications of MPC561MZP56

• Cpu Family: MPC56x
• Device Core: PowerPC
• Device Core Size: 32b
• Frequency (max): 56MHz
• Interface Type: QSPI/SCI/SPI/UART
• Total Internal Ram Size: 32KB
• # I/os (max): 56
• Number Of Timers - General Purpose: 22
• Operating Supply Voltage (typ): 2.6/5V
• Operating Supply Voltage (max): 2.7/5.25V
• Operating Supply Voltage (min): 2.5/4.75V
• On-chip Adc: 2(32-chx10-bit)
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 388
• Package Type: BGA
• Program Memory Type: ROMLess
• Program Memory Size: Not Required
• Lead Free Status / RoHS Status: Not Compliant

External Bus Interface
Figure 9-27
9-36
1
2
External master will be granted external bus ownership if EARP is greater than the internal access priority.
Parked access is instruction or data access from the RCPU which is initiated on the internal bus without
requesting it first in order to improve performance.
Instruction access
External access
Parked access
illustrates the internal finite-state machine that implements the arbiter protocol.
Data access
Table 9-4. Priority Between Internal and External Masters over External Bus
Type
No Longer
Needs the Bus
MPC500 Device
BR = 1
External Device With Higher
Priority than the Current Internal
Bus Master Requests the Bus
BG = 1
BB = three
state
2
IDLE
External Master
Requests Bus
BR = 0
Figure 9-27. Internal Bus Arbitration State Machine
MPC561/MPC563 Reference Manual, Rev. 1.2
external → external/internal
Internal → external
Internal → external
Internal → external
Direction
MCU Needs
the Bus
External Master
Release Bus
Device Owner
MPC500
External
BG = 0
BB = three
state
BG = 1
BB = 0
Owner
Internal Master With Higher
Priority than the External Device
Requires the Bus
EARP (could be programmed to 0 – 7)
MPC500 Device
MPC500 Device
Still Needs
the Bus
BB = 1
Bus
MPC500
BG = 1
BB = three
state
Device
Priority
Wait
0
3
4
BB = 0
Freescale Semiconductor
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