MPC561MZP56 Freescale, MPC561MZP56 Datasheet - Page 782
MPC561MZP56
Manufacturer Part Number
MPC561MZP56
Description
Manufacturer
Freescale
Datasheet
1.MPC561MZP56.pdf
(1420 pages)
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
Available stocks
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Company:
Part Number:
MPC561MZP56
Manufacturer:
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Modular Input/Output Subsystem (MIOS14)
The relationship between the output frequency obtained (F
(f
loaded in the counter (V
17.10.3.4 Pulse Width Registers
The pulse width section is composed of two 16-bit data registers (MPWMPULR1 and MPWMPULR2).
Only MPWMPULR1 is accessible by software. The software establishes the pulse width of the
MPWMSM output signal in MPWMPULR1. MPWMPULR2 is used as a double buffer of
MPWMPULR1.
When the MPWMSM is running in transparent mode, the pulse width value in MPWMPULR1 is
immediately transferred in MPWMPULR2 so that the new value takes effect immediately.
When the MPWMSM is not running in double-buffered mode, the pulse width value in MPWMPULR1
can be changed at any time without affecting the current pulse width of the output signal. The new value
in MPWMPULR1 will be transferred to MPWMPULR2 only when the down-counter reaches the value of
0x0001.
When the counter first reaches the value in MPWMPULR2, the output flip-flop is set. The output is reset
when the counter reaches 0x0001. The pulse width match starts the width of the output signal, it does not
affect the counter. MPWMPULR1 is software readable and writable at any time. The MPWMSM does not
modify the content of MPWMPULR1.
The PWM output pulse width can be as wide as one period minus one MPWMSM clock count: (i.e.,
MPWMPULR2 = MPWMPERR — [one MPWMSM clock count]). At the other end of the pulse width
range, MPWMPULR2 can contain 0x0001 to create a pulse width of one PWM clock count.
17-50
SYS
•
•
•
), the MCPSM clock divide ratio (N
The value 0x0000 in the period register, causes the counter to act like a free running counter. This
condition creates a period of 65536 PWM clock periods.
The value 0x0001 in the period register will always cause a period match to occur and the counter
will never decrement below 0x0001. This condition is defined as a period of “1” PWM clock count.
The output flip-flop is always set unless MPWMPULR = 0x0000, when the output flip-flop is
always reset. Refer to
100% duty cycles.
Writing value 0x0002 in the period register causes a period match to occur every two clock periods.
The counter decrements from 0x0002 to 0x0001, and then it is initialized back to 0x0002. This
condition is defined as a period of 2 clock counts. Note that the value 0x0002 loaded in the period
register and a value of 0x0001 in the pulse width register is the condition to obtain the maximum
possible output frequency for a given clock period.
When the MPWMSM is in disable mode, writing to MPWMPULR1 will
write automatically to MPWMPULR2.
COUNTER
f
PWMO
Section 17.10.3.5, “Duty Cycles (0% and
MPC561/MPC563 Reference Manual, Rev. 1.2
=
) is given by the following equation:
MCPSM
N
MCPSM
), the counter divide ratio (N
NOTE
• N
MPWMSM
f
SYS
PWMO
• V
COUNTER
) and the MIOS14 CLOCK frequency
100%)” for details about 0% and
MPWMSM
Freescale Semiconductor
) and the value
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