MCF5272VF66 Freescale Semiconductor, MCF5272VF66 Datasheet - Page 529

• Manufacturer Part Number: MCF5272VF66
• Description: IC MPU 32BIT 66MHZ 196-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF527xr

Specifications of MCF5272VF66

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 66MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SPI, UART/USART, USB
• Peripherals: DMA, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (4K x 32)
• Program Memory Type: ROM
• Ram Size: 1K x 32
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 196-MAPBGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Appendix B
Buffering and Impedance Matching
When required:
Freescale Semiconductor
What to do:
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configuration.
and hold times are met and to minimize EMC noise in terms of overshoot and undershoot of
signals.
SDRAM and a large number of external peripherals are required for a particular system
Some peripherals may have excessive input capacitance.
Minimize signal reflections at higher clock speeds.
Minimize capacitive loading on signals to SDRAMs.
Operation of MCF5272 at highest frequencies, i.e. 66MHz, requires clean signals to ensure setup
Add buffers on address and control signals shared by SDRAM and other peripherals.
NEVER put buffers between the MCF5272 device and the SDRAMs.
Put termination resistors as close as possible to outputs.
Or use buffers that have integral termination resistors.
MCF5272 ColdFire
®
Integrated Microprocessor User’s Manual, Rev. 3
B-1