MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 558

• 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
master station. Slave stations not addressed continue monitoring the data stream. Data fields in the
data stream are separated by an address character. After a slave receives a block of data, its CPU
disables the receiver and repeats the process. Functional timing information for multidrop mode
is shown in
A character sent from the master station consists of a start bit, a programmed number of data bits,
an address/data (A/D) bit flag, and a programmed number of stop bits. A/D = 1 indicates an
address character; A/D = 0 indicates a data character. The polarity of A/D is selected through
UMR1n[PT]. UMR1n should be programmed before enabling the transmitter and loading the
corresponding data bits into the transmit buffer.
In multidrop mode, the receiver continuously monitors the received data stream, regardless of
whether it is enabled or disabled. If the receiver is disabled, it sets the RxRDY bit and loads the
character into the receiver holding register FIFO provided the received A/D bit is a one (address
tag). The character is discarded if the received A/D bit is zero (data tag). If the receiver is enabled,
all received characters are transferred to the CPU through the receiver holding register during read
operations.
26-26
USRn[RxRDY]
USRn[TxRDY]
Transmitter
Receiver
Figure
Enabled
Enabled
UnRXD
UnTXD
internal
module
internal
module
select
select
UMR1n[PM] = 11
UMR1n[PT] = 1
26-24.
UMR1n
UMR1n[PM] = 11
Figure 26-24. Multidrop Mode Timing Diagram
[PM] = 11
A/D
ADD 1
0
UMR1n[PT] = 0
ADD1
ADD1
MCF5235 Reference Manual, Rev. 2
A/D
A/D
C0
1
1
ADD 1
Peripheral Station
C0
C0
Master Station
A/D
A/D
Status Data
UMR1n[PT] = 2
(C0)
ADD 2
ADD2
ADD2
A/D
A/D
1
1
Freescale Semiconductor
Status Data
(ADD 2)
A/D
0