XE924 Просмотр технического описания (PDF) - Xecom
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XE924 Datasheet PDF : 19 Pages
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XE924 PIN CONFIGURATION
/MRI
RING
26
/MRI supplies the Ring Indication output from the embedded
modem in the XE924. /MRI is active low. /MRI is normally
tied to Pin 26
27
The Ring and Tip signals provide the connection from the XE924 to
the telephone line. FCC Part 68 Rules require a 1500 volt isolation
barrier between the telephone line and all other circuits. This isolation
must be preserved throughout the system.
TIP
NO PIN
RTS
/MDTR
/DTR
/MDCD
UL60950 requires minimum creepage and clearances distances be
maintained between the Tip and Ring traces and all other circuits.
Clearance is the shortest distance between conductive circuits; creepage
is the distance between conductive surfaces along the surface.
28
The Ring and Tip signals provide the connection from the XE924 to the
telephone line. FCC Part 68 Rules require a 1500 volt isolation barrier
between the telephone line and all other circuits. This isolation must be
preserved throughout the system.
UL60950 requires minimum creepage and clearances distances be
maintained between the Tip and Ring traces and all other circuits.
Clearance is the shortest distance between conductive circuits; creepage
is the distance between conductive surfaces along the surface.
29
This pin is intentionally removed to improve the isolation from
the local telephone line.
32
/RTS supplies the Request to Send out put from the communi-
cations controller. /RTS is an active low output.
33
/MDTR connects to the modems Data terminal Ready line. It
is an active low input to the XE924. /MDTR is normally tied to
/DTR, pin 34.
34
/DTR provides the Data Terminal Ready output from the
communications controller. /DTR is normally tied to /MDTR,
pin 33. This is an active low output.
35
/MDCD provides the Data Carrier Detect output from the
modem inside XE924. This is an active low output. /MDCD is
normally tied to /DCD, pin 36.
/DCD
36
/DCD is the Data Carrier detect input to the communications
controller. /DCD is normally tied to /MDCD, pin 35.
XECOM
(5)
XE924
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