MCF5407AI220 Freescale Semiconductor, MCF5407AI220 Datasheet - Page 366

• Manufacturer Part Number: MCF5407AI220
• Description: IC MPU 32B 220MHZ COLDF 208-FQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF540xr

Specifications of MCF5407AI220

• Core Processor: Coldfire V4
• Core Size: 32-Bit
• Speed: 220MHz
• Connectivity: EBI/EMI, I²C, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 208-FQFP
• Maximum Clock Frequency: 220 MHz
• Operating Supply Voltage: 1.8 V, 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Program Memory Size: 24KB
• Cpu Speed: 220MHz
• Embedded Interface Type: I2C, UART
• Digital Ic Case Style: FQFP
• No. Of Pins: 208
• Supply Voltage Range: 3.3V
• Rohs Compliant: Yes
• For Use With: M5407C3 - KIT EVAL FOR MCF5407 W/ETHERNET
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Operation
14.5.1.1 Programmable Divider
As Figure 14-28 shows, the UART transmitter and receiver can use the following clock
sources:
The choice of TIN or CLKIN is programmed in the UCSR.
14.5.1.2 Calculating Baud Rates
The following sections describe how to calculate baud rates.
14.5.1.2.1 CLKIN Baud Rates
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.
Using a 54-MHz CLKIN, the baud-rate calculation is as follows:
14-24
• An external clock signal on the TIN pin that can be divided by 16. When not divided,
• CLKIN supplies an asynchronous clock source that is divided by 32 and then
TIN provides a synchronous clock mode; when divided by 16, it is asynchronous.
divided by the 16-bit value programmed in UDUn and UDLn. See Section 14.3.16,
“UART Divider Upper/Lower Registers (UDUn/UDLn).”
CLKIN
TOUT
RxD
TxD
TIN
If TIN is a clocking source for either the timer or UART, as is
the case for UART1 used as an 8- or 16-bit CODEC interface,
the timer module cannot use TIN for timer capture.
Figure 14-28. Clocking Source Diagram
Rx Buffer
Tx Buffer
Rx
Tx
Timer Module
On-Chip
MCF5407 User’s Manual
Clocking sources programmed in UCSR
NOTE:
Generator
Prescaler
Prescaler
Clock
x16
x1
UART
TIN
TIN
Divider
16-Bit
Prescaler
x32