MCF5270CAB100 Freescale Semiconductor, MCF5270CAB100 Datasheet - Page 456

• 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

UART Modules
24.4.1.2 Calculating Baud Rates
The following sections describe how to calculate baud rates.
24.4.1.2.1 internal Bus Clock Baud Rates
When the internal bus clock is the UART clocking source, it goes through a divide-by-32 prescaler
and then passes through the 16-bit divider of the concatenated UBG1n and UBG2n registers. The
baud-rate calculation is as follows:
Using a 75 MHz internal bus clock and letting baud rate = 9600, then
therefore UBG1n = 0x00 and UBG2n = 0x.
24-18
DTnOUT
If DTnIN is a clocking source for either the timer or UART, that timer
module cannot use DTnIN for timer input capture.
UnRXD
UnTXD
DTnIN
f
sys/2
Divider
Figure 24-17. Clocking Source Diagram
Tx Buffer
Rx Buffer
=
Rx
Tx
------------------------------ -
[
32 x 9600
75MHz
Timer Module
MCF5271 Reference Manual, Rev. 2
On-Chip
Baudrate
]
=
244 decimal
Clocking sources programmed in UCSR
NOTE
(
=
Generator
Prescaler
Prescaler
---------------------------------- -
[
32 x divider
Clock
x16
x1
f
sys 2 ⁄
UART
)
=
0x00F4 hexadecimal
]
Divider
16-Bit
(
TIN
TIN
Prescaler
x32
)
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