MCF5272CVF66 Freescale Semiconductor, MCF5272CVF66 Datasheet - Page 380

• Manufacturer Part Number: MCF5272CVF66
• Description: IC MPU 32BIT 66MHZ 196-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF527xr

Specifications of MCF5272CVF66

• 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: -40°C ~ 85°C
• Package / Case: 196-MAPBGA
• Family Name: MCF5xxx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 66MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 196
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Not Compliant

UART Modules
16.5.1.1
As
Note that when autobaud mode is enabled, the UFPDn, UDUn, and UDLn are automatically loaded with
the calculated baud rate. However, the calculated value can be overridden by a programmed value at any
time.
The choice of URT_CLK or CLKIN is programmed in the UCSR.
16.5.1.2
The following sections describe how to calculate baud rates.
16.5.1.2.1
When CLKIN is the UART clocking source, it goes through a divide-by-32 prescaler and then passes
through the 16-bit divider of the concatenated UDUn and UDLn registers. The UFPD register can be used
16-20
Figure 16-23
•
•
An external clock signal on the URT_CLK pin that can be divided by 16. When not divided,
URT_CLK provides a synchronous clock mode; when divided by 16, it is asynchronous.
CLKIN supplies an asynchronous clock source that is prescaled by 32 and then divided by the
16-bit value programmed in UDUn and UDLn. See
Registers
programmed in UFPDn.
Programmable Divider
Calculating Baud Rates
URT_CLK
URT_RxD
URT_TxD
CLKIN Baud Rates
CLKIN
shows, the UART transmitter and receiver can use the following clock sources:
(UDUn/UDLn).” The precision of this clock source can be tuned using the 4-bit value
MCF5272 ColdFire
Rx Buffer
Tx Buffer
Figure 16-23. Clocking Source Diagram
Tx
Rx
®
Integrated Microprocessor User’s Manual, Rev. 3
Clocking sources programmed in UCSR
Generator
Prescaler
Prescaler
Clock
x16
x1
UART
Section 16.3.11, “UART Divider Upper/Lower
(UFPD)
Divider
4-Bit
1-Bit Divider
(UDU, UDL)
Prescaler
16-Bit
Freescale Semiconductor