SPI/I2C UART with 128-Word FIFOs in WLP MAX3108 21 Maxim Integrated Echo Suppres" />
參數(shù)資料
型號: MAX3108EWA+T
廠商: Maxim Integrated Products
文件頁數(shù): 14/56頁
文件大?。?/td> 0K
描述: IC UART
產(chǎn)品培訓(xùn)模塊: Obsolescence Mitigation Program
標準包裝: 2,500
系列: *
SPI/I2C UART with 128-Word FIFOs in WLP
MAX3108
21
Maxim Integrated
Echo Suppression
The MAX3108 can suppress echoed data that is some-
times found in half-duplex communication networks,
such as RS-485 and IrDA. If the transceiver’s receiver
is not turned off while the transceiver is transmitting,
copies (echoes) of the transmitted data are received
by the UART. The MAX3108’s receiver can block the
reception of this echoed data by enabling echo sup-
pression. Figure 11 shows a typical RS-485 application
using the echo suppression feature. Set the MODE2[7]:
EchoSuprs bit high to enable echo suppression.
The MAX3108 can also block echoes with a long round
trip delay by disabling the transceiver’s receiver with
the RTS output while the MAX3108 is transmitting. The
transmitter can be configured to remain enabled after
the end of the transmission for a programmable period
of time called the hold time delay (Figure 12). The hold
time delay is set by the HDplxDelay[3:0] bits. See
the HDplxDelay description in the Detailed Register
Descriptions section for more information.
Echo suppression can operate simultaneously with auto
transceiver direction control.
Figure 11. Half-Duplex with Echo Suppression
Figure 12. Echo Suppression Timing
MAX3108
MAX14840E
TRANSMITTER
TX
B
A
D
RX
TxFIFO
RECEIVER
ECHO
SUPPRESSION
RxFIFO
DI
RO
RE
DE
R
RTS
TX
RX
DI TO RO PROPAGATION DELAY
HOLD DELAY
STOP
BIT
RTS
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