參數(shù)資料
型號(hào)： XE5614L
廠商： Electronic Theatre Controls, Inc.
英文描述： Compact 56 KBPS Modem Module for Embedded Applications
中文描述： 緊湊型56 Kbps調(diào)制解調(diào)器模塊為嵌入式應(yīng)用
文件頁(yè)數(shù)： 3/17頁(yè)
文件大小： 67K
代理商： XE5614L
XECOM
(3)
XE5614L
PIN NAME
DESCRIPTION
XE5614L PIN DESCRIPTIONS
1
NC
No Internal Connection
2
AR
Auxiliary Data/Voice Relay, Active High Output, TTL/CMOS. The AR signal goes high when ever the
modem is in the on-hook state. It can be connected to an external relay to switch control of the tele-
phone line between the modem and an auxiliary handset when.
3
RXD
Received Data, Output, TTL. Serial data output to the host. A logic "High" on RXD represents a
"mark" and a logic "Low" represents a "space".
4-8
NC
No Internal Connection
9
\DTR
Data Terminal Ready, Input, active Low, TTL. The "AT&D" command sets the function of \DTR. The
default, AT&D2, requires the host to assert \DTR to permit a modem link. The modem drops the call in
progress if \DTR is revoked and will not connect until \DTR is reasserted.
10
NC
No Internal Connection
11
\CTS
Clear to Send, Output, active Low, TTL/CMOS. \CTS provides the flow control output from the modem
when hardware flow control is selected. The modem revokes \CTS when the modem's input buffer is
full. The modem reasserts \CTS when the buffer can accept more data without a buffer overflow.
12
NC
No Internal Connection
13
TXD
Transmit Data, Input, TTL. Serial data input from the host. A logic "High" represents a "mark" and a
Low represents a "space", TTL.
14
\RTS
Request to Send, input, active Low, TTL. The XE5614L uses \RTS for hardware flow control. When
\RTS is revoked; hardware flow control is enabled, and the modem will not place data on RXD.
15
NC
No Internal Connection
16
\RI
Ring Indicator, Output, active Low, TTL. When low indicates the modem is receiving a ring signal.
18
TIP
Tip connection to the phone line (RJ11 pin 3) from the internal DAA. The XE5614L is not sensitive to
the battery voltage polarity across Tip and Ring.
20
RING
Ring connection to the phone line (RJ11 pin 4) from the internal DAA.
21
GND
Ground (0 volts)
22
AMP
Audio Output function is set by L & M commands and the value in register S22. This output can drive a
minimum load of 300 ohms.
27-29
N/C
No Internal Connection
30
OH
Off-Hook, Output, active High. OH indicates the modem's hookswitch relay is closed. Hookswitch clo-
sure connects the modem to the telephone line. This signal is available only on the XE5614L.
31-35
N/C
No Internal Connection
36
RESET
Hardware reset pin, Input, active High, TTL. A high on Pin 36 initiates a hardware reset. An external
reset is not required or recommended. The Reset pulse must be held a minimum of 100 milliseconds.
37
N/C
No Internal Connection
38
\DCD
Data Carrier Detect, Output Active Low, TTL/CMOS. The &C command sets the function of \DCD. In
the default state \DCD activates when a valid carrier is detected.
39
\DSR
Data Set Ready, Output, active Low, TTL/CMOS. &S sets the \DSR function. In the default condition,
AT&S0, \DSR is forced true.
40
Vcc
+5 Volts
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