MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 550

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

UART Modules
26.4.1.2 Calculating Baud Rates
The following sections describe how to calculate baud rates.
26.4.1.2.1 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 = 0xF4.
26-18
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 26-17. Clocking Source Diagram
Tx Buffer
Rx Buffer
=
Rx
Tx
------------------------------ -
[
32 x 9600
75MHz
Timer Module
MCF5235 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
)
Freescale Semiconductor