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參數(shù)資料
| 型號： | XRT4500 |
| 廠商： | Exar Corporation |
| 英文描述： | MULTIPROTOCOL SERIAL NETWORK INTERFACE IC |
| 中文描述： | 多協(xié)議串行網(wǎng)絡(luò)接口芯片 |
| 文件頁數(shù)： | 49/99頁 |
| 文件大?。?/td> | 1384K |
| 代理商： | XRT4500 |
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XRT4500
MULTIPROTOCOL SERIAL NETWORK INTERFACE IC
REV. 1.0.7
á
46
The DTE Terminal
The DTE Terminal is responsible for sourcing/gener-
ating all of the following signals.
TXD - Transmit Data
TXCE (or SCTE) - Transmit Clock Echo
DTR - Data Terminal Ready
RTS - Request to Send
LL - Local Loop-back Indicator
RL - Remote Loop-back Indicator
Further, the DTE Terminal is responsible for receiv-
ing/terminating all of the following signals.
RXD - Receive Data
TXC - Transmit Clock
RXC - Receive Clock
DSR - Data Set Ready
DCD - Data Carrier Detect
CTS - Clear-to-Send
RI (Ring Indicator)
TM (Test Mode Indicator).
Because of this, whenever the XRT4500 is configured
to operate in the “DTE” Mode, then the following con-
figuration conditions are “TRUE”.
Two “high-speed” Transmitters are enabled, and
Three “high-speed” Receivers are enabled.
Four “l(fā)ow-speed” Transmitters are enabled, and
Four “l(fā)ow-speed” Receivers are enabled.
Other Comments about DCE and DTE Equipment
Whenever DCE and DTE Equipment are interfaced to
each other, the DCE Equipment is typically the
source of all timing signals. The DTE Equipment will
typically function as a “Clock Slave”.
1.3.3
The LP - Loop-Back Enable/Disable
Select Pin
As mentioned earlier, the XRT4500 can be configured
to operate in the loop-back mode. Setting the “LP” in-
put pin “high” disables the loop-back mode (within the
XRT4500). Conversely, setting this input “l(fā)ow” config-
ures the XRT4500 to operate in the “TXD/RXD” loop-
back mode.
A detailed description of the “TXD/RXD” loop-back
Mode is presented below.
Behavior of DTE/DCE Mode Devices, when the
Loop-Back Mode is Disabled
Figure 17 presents an illustration of a DTE and DCE
Terminal interfaced to each other when no XRT4500
Loop-Back Mode has een configured.
F
IGURE
17. I
LLUSTRATION
OF
BOTH
THE
DTE
AND
DCE M
ODE
XRT4500
OPERATING
,
WHEN
THE
L
OOP
-B
ACK
M
ODE
IS
DISABLED
DTE (#2)
SCC (L)
XRT4500
XRT4500
RX1
TX1
RX2
TX2
RX3
TX3
RX2
TX2
RX1
TX1
RXD
RXC
TXC
SCTE_IN
TXD_IN
TXD
SCTE
TXC_IN
RXC_IN
RXD_IN
60
67
73
74
1
78
79
77
76
70
71
64
65
63
62
1
74
68
67
60
63
62
64
65
70
71
77
76
78
79
TXD
TXC
RXC
RXD
SCC (R)
DTE (#1)*
SCTE
* Indicates scenario # from Table 8
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| XRT4500CV | MULTIPROTOCOL SERIAL NETWORK INTERFACE IC |
| XRT56L85 | Low Power PCM Line Interface |
| XRT5794ES | Evaluation System |
| XRT5894ES | () |
| XRT5894 | Four-Channel E1 Line Interface (3.3V or 5.0V)(四通道E1 3.3V線接口單元) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XRT4500CV | 制造商:EXAR 制造商全稱:EXAR 功能描述:MULTIPROTOCOL SERIAL NETWORK INTERFACE IC |
| XR-T5600P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Repeater |
| XR-T56188CD | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Transceiver |
| XR-T56188CP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Transceiver |
| XR-T56188ID | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:PCM Transceiver |
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