MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 551

• 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

26.4.1.2.2 External Clock
An external source clock (DTnIN) can be used as is or divided by 16.
If f
26.4.2
Figure 26-18
and operating registers, which are described generally in the following sections and described in
detail in
26.4.2.1 Transmitter
The transmitter is enabled through the UART command register (UCRn). When it is ready to
accept a character, the UART sets USRn[TxRDY]. The transmitter converts parallel data from the
CPU to a serial bit stream on UnTXD. It automatically sends a start bit followed by the
programmed number of data bits, an optional parity bit, and the programmed number of stop bits.
The lsb is sent first. Data is shifted from the transmitter output on the falling edge of the clock
source.
Freescale Semiconductor
extc
Transmit Buffer
is the external clock frequency, then the baud rate can be described with this equation:
(2 Registers)
Section 26.3, “Memory Map/Register
(UTBn)
Transmitter and Receiver Operating Modes
UART
is a functional block diagram of the transmitter and receiver showing the command
Figure 26-18. Transmitter and Receiver Functional Diagram
UART Receive
Buffer (URBn)
(4 Registers)
Receiver Holding Register 1
UART Command Register (UCRn)
UART Mode Register 1 (UMR1n)
UART Mode Register 2 (UMR2n)
UART Status Register (USRn)
Transmitter Holding Register
Receiver Holding Register 2
MCF5235 Reference Manual, Rev. 2
Transmitter Shift Register
Receiver Holding Register 3
UARTn
Baudrate
Receiver Shift Register
Definition.”
=
-------------------- -
(16 or 1)
f
extc
R/W
R/W
R
W
W
R
FIFO
Functional Description
Interface
External
UnRXD
UnTXD
26-19