MCF5270CAB100 Freescale Semiconductor, MCF5270CAB100 Datasheet - Page 155

• Manufacturer Part Number: MCF5270CAB100
• Description: MCU V2 COLDFIRE 64K SRAM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: MCF527xr

Specifications of MCF5270CAB100

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SPI, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 160-QFP
• Processor Series: MCF527x
• Core: ColdFire V2
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: NNDK-MOD5272-KIT, NNDK-MOD5270-KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

7.4.6
In PLL mode, the PLL synthesizes the system clocks. The PLL can multiply the reference clock
frequency by 4x to 18x, provided that the system clock frequency remains within the range listed
in the electrical specifications. For example, if the reference frequency is 8 MHz, the PLL can
synthesize frequencies of 32 MHz to 144 MHz. In addition, the RFD can reduce the system
frequency by dividing the output of the PLL. The RFD is not in the feedback loop of the PLL, so
changing the RFD divisor does not affect PLL operation. Finally, the PLL can be frequency
modulated to reduce electromagnetic interference often associated with clock circuitry.
Figure 7-9
values. Actual component values depend on crystal specifications.
The following subsections describe each major block of the PLL. Refer to
these functional sub-blocks interact.
Freescale Semiconductor
PLL Operation
shows the external support circuitry for the crystal oscillator with example component
VSSPLL
C1
ON-CHIP
Figure 7-9. Crystal Oscillator Example
EXTAL
MCF5271 Reference Manual, Rev. 2
RF
XTAL
RS
VSSPLL
C2
8-MHz Crystal Configuration
C1 = C2 = 16 pF
RF ≥ 1 MΩ
RS = 470 Ω
Figure 7-10
Functional Description
to see how
7-21