MPC561MZP56 Freescale, MPC561MZP56 Datasheet - Page 349

• 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

9.5.2
During the data transfer phase, the data is transferred from master to slave (in write cycles) or from slave
to master (on read cycles).
During a write cycle, the master drives the data as soon as it can, but never earlier than the cycle following
the address transfer phase. The master has to take into consideration the “one dead clock cycle” switching
between drivers to avoid electrical contentions. The master can stop driving the data bus as soon as it
samples the TA line asserted on the rising edge of the CLKOUT.
During a read cycle, the master accepts the data bus contents as valid at the rising edge of the CLKOUT
in which the TA signal is sampled/asserted.
9.5.2.1
The basic read cycle begins with bus arbitration, followed by the address transfer, then the data transfer.
The handshakes illustrated in the following flow and timing figures
Figure
Freescale Semiconductor
9-6) are applicable to the fixed transaction protocol.
Single Beat Transfer
Single Beat Read Flow
4. Assert transfer start (TS)
3. Assert bus busy (BB) if no other master is driving bus
5. Drive address and attributes
2. Receive bus grant (BG) from arbiter
1. Request bus (BR)
Figure 9-4. Basic Flow Diagram of a Single Beat Read Cycle
Master
MPC561/MPC563 Reference Manual, Rev. 1.2
1. Receive address
2. Return data
3. Assert transfer acknowledge (TA)
(Figure
Slave
9-4,
Figure
External Bus Interface
9-5, and
9-9