MPC561MZP56 Freescale, MPC561MZP56 Datasheet - Page 1150

• 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

Clock and Board Guidelines
C.2.3
C
The maximum noise allowed on XFC is 50 mV peak-to-peak with a typical cut-off frequency of 500 Hz.
The XFC capacitor creates a low pass filter in the PLL loop. The filter output feeds the PLL VCO. The
capacitor is charged and discharged by short current pulses, generated by the phase detector. So the
capacitor leakage and absorption directly affect the AC component in the VCO input voltage that creates
PLL output clock jitter. Therefore, the dielectric quality of C
Smaller C
but slower to gain lock. Because each board layout and application is unique, C
a system.
The minimum required value (including capacitor tolerance) for C
cases:
C-6
XFC
is the PLL feedback capacitor. It must be located as close as possible to the XFC and VDDSYN pads.
0 < (MF+1) < 4
(MF+1) >= 4
XFC
PLL Off-Chip Capacitor C
makes the PLL faster to gain lock but less stable. Higher C
Note: A filter cut off frequency of 500Hz is recommended, however this will result in a
capacitor size of 33uF using a 10 Ohm resistor. This may be too expensive or large
for the system. In this case the filter shown with cut- off frequency of 160kHz will suffice.
Note: A filter cut off frequency of 500Hz is recommended, however this will result in a
capacitor size of 15uF using a 8.2mH inductor. This may be too expensive or large
for the system. In this case the filter shown with cut- off frequency of 5.5kHz will suffice.
Keyed
VDD 2.6 V
Keyed
VDD 2.6 V
Figure C-7. LC Filter Example (Alternative)
MPC561/MPC563 Reference Manual, Rev. 1.2
8.2 mH
Board
Board
10 Ω
Figure C-6. RC Filter Example
100 nF
100 nF
VSSSYN
VSSSYN
XFC
C
C
XFC
XFC
= (2100 * (MF+1)) pF
= (1130 * (MF+1) – 80) pF
MPC56x Device
MPC56x Device
XFC
VDDSYN
XFC
VDDSYN
should be high.
is determined by the following two
XFC
makes the PLL more stable
XFC
must be evaluated in
Freescale Semiconductor