MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 532

• Manufacturer Part Number: MC56F8257MLH
• Description: DSC 64K FLASH 60MHZ 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8257MLH

• Core Processor: 56800E
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Product: DSCs
• Processor Series: 56800E
• Core: 56800E
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 54
• Data Ram Size: 8 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Phase Locked Loop
The key point to remember in this flow is that the clock source should not be switched
unless the desired clock is on and stable.
When a new DSP core clock is selected, the clock generation module will synchronize
the request and select the new clock. The OCCS Status Register (STAT) shows the status
of the DSP core clock source. Since the synchronizing circuit changes clock sources as to
avoid any glitches, the ZSRCS bits in STAT will show overlapping modes as an
intermediate step.
15.9
15.9.1 PLL Recommended Range of Operation
The voltage controlled oscillator (VCO) within the PLL has a characterized operating
range extending from 120MHz to 240MHz. The output of the PLL, F
input of the postscaler.
532
• Execute 4 NOPs instructions
• Disable previous clock source (i.e. power down Relaxation Osc if Crystal is
selected).
CLK_MODE
EXTAL_EN
COHL
Phase Locked Loop
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
EXTAL
Low-Power
High Gain
Oscillator
Oscillator
Preliminary
XTAL
XTL_CLK
EN
pll
, is fed to the
Freescale Semiconductor
Mux
OSC_CLK