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參數(shù)資料
| 型號(hào)： | XE2401L |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Silver Mica Capacitor; Capacitance:100pF; Capacitance Tolerance: 2%; Series:CD15; Voltage Rating:500VDC; Capacitor Dielectric Material:Mica; Termination:Radial Leaded; Lead Pitch:5.9mm; Leaded Process Compatible:No RoHS Compliant: No |
| 中文描述： | 2400bps串行輸入組件調(diào)制解調(diào)器 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 80K |
| 代理商： | XE2401L |
4/XECOM
XE2401L
AT Commands
The XE2401L uses "AT" commands for
configuration and control. This section describes
use of the AT command format and lists the AT
commands, Registers and Result codes.
Modes of Operation
The "AT" commands have two operational
modes; Command Mode and Data Mode.
Data Mode:
The XE2401L enters data mode
after it connects with a remote modem and issues
an appropriate "CONNECT" result code. In the
Data Mode the modem sends all data presented
on Transmit Data (TXD) to the remote modem
and puts data from the remote modem onto
Received Data (RXD). When the modem exits
data mode, it issues a "NO CARRIER" result
code.
Command Mode:
The XE2401L enters
command mode on power-up, reset, a lost
connection, or receipt of the escape code. In
command mode the modem accepts commands
from the host on transmit data. Appropriate result
codes are returned on received data.
Command Line Format
Command lines issued to the modem follow a
strict format. Each command begins with the
prefix AT. The command line is stored in the
command buffer and executed upon receipt of a
carriage return. Until executed, the command
line can be editied with the backspace key.
Command Prefix
- Each command, except the
A/ command, begins with the AT prefix. The "A"
and "T" may be either both upper case or both
lower case but cannot be of different cases. The
prefix identifies the speed and parity of the
commands sent to the modem by the host.
Speed is determined by measuring the width of
the incoming bits. Parity is determined by
comparing the parity bit of the "A" and the "T."
Command Line
- Commands may be strung
together in a single command line of up to 40
characters. Commands are executed in the
sequence they appear. Spaces may be inserted
into the command line but do not fill space in the
command buffer. A carriage return terminates the
command line and causes the commands to be
executed. Register S3 allows the user to select a
character other than a carriage return to terminate
the command line.
Command Buffer
- No more than 40 characters,
including the AT prefix, may be loaded into the
command buffer. If the command buffer
overflows, the modem issues an "ERROR" result
code and commands are not executed.
Command Line Editing
- The backspace can be
used to edit a command line before it is executed.
The backspace key, (Control and H
simultaneously on some systems), erases the
previous character in the command line. Register
S5 allows the user to select a character other
than a backspace to edit the command line.
Re-Execute Last Command
- The A/ command
causes the modem to reexecute the last
command line. This is the only command which
does not require the "AT" prefix.
Ommitted Parameters
- Most commands include
a parameter which determines how the functions
will be set. When the command parameter is
omitted from the command string, it is assumed to
be a 0.
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