MPC561MZP56 Freescale, MPC561MZP56 Datasheet - Page 751

• 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

17.8
The MMCSM is a versatile counter submodule capable of performing complex counting and timing
functions, including modulus counting, in a wide range of applications. The MMCSM may also be
configured as an event counter, allowing the overflow flag to be set after a predefined number of events
(internal clocks or external events), or as a time source for other submodules.
The main components of the MMCSM are an 8-bit prescaler counter, an 8-bit prescaler register, a 16-bit
up-counter register, a 16-bit modulus latch register, counter loading and interrupt flag generation logic.
The contents of the modulus latch register is transferred to the counter under the following three
conditions:
Software can also write a value to the modulus register for later loading into the counter with one of the
two first criteria.
A software control register selects whether the clock input to the counter is one of the prescaler outputs or
the corresponding input signal. The polarity of the external input signal is also programmable.
The following sections describe the MMCSM in detail. A block diagram of the MMCSM is shown in
Figure
Freescale Semiconductor
1. When an overflow occurs
2. When an appropriate transition occurs on the external load signal
3. When the program writes to the counter register. In this case, the value is first written into the
17-10.
modulus register and immediately transferred to the counter.
MIOS14 Modulus Counter Submodule (MMCSM)
The MMCSM can also operate as a free running counter by loading the
modulus value of zero.
MPC561/MPC563 Reference Manual, Rev. 1.2
NOTE
Modular Input/Output Subsystem (MIOS14)
17-19