XE2420 Просмотр технического описания (PDF) - Xecom
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XE2420 Datasheet PDF : 16 Pages
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XE2420 Pin Configuration
/DCD
1
/CTS
2
RESET
3
/DSR
4
/RTS
5
/DTR
6
/RXD
7
/TXD
8
/RI
9
GND 10
N/C 11
EECL 12
EEDT 13
Vcc 14
Vui 15
TOP
24 RING
23 N/C
22 TIP
21 N/C
20 N/C
19 HI3
18 HI1
17 CD
16 HI2
Pin Descriptions
PIN NAME DESCRIPTION
1 /DCD
2 /CTS
3 RESET
4 /DSR
5 /RTS
6 /DTR
7 /RXD
/DCD is an active low output from the modem. The AT&C command controls when the
XE2420 asserts /DCD.
/CTS is an active low output from the modem. The modem asserts /CTS to indicate that it can
accept data from the terminal equipment on /TXD.
RESET is an active high input which intiates a modem hardware reset. RESET must be active
for a minimum of 100 milliseconds for a proper modem reset sequence. No external reset is
required; if none is used the RESET signal should be left open.
/DSR is an active low output from the modem. The AT&S command controls when the XE2420
asserts /DSR.
/RTS is an active low input to the modem. /RTS indicates to the modem that the host has data
to send.
/DTR is an active low input to the modem. The AT&D command determines how the modem
will interpret activity on /DTR.
/RXD provides the path for received data and modem responses to be sent from the modem to
the host terminal equipment.
XECOM
(3)
XE2420
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