XE2420G Просмотр технического описания (PDF) - Unspecified
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XE2420G Datasheet PDF : 22 Pages
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XE2420G Pin Configuration
/DCD
1
/CTS
2
/RES ET
3
/DS R
4
/RTS
5
/DTR
6
/RXD
7
/TXD
8
/RI
9
GND
10
S PKR
11
N/C
12
/INT
13
VCC
14
N/C
15
Top
24
RING
23
N/C
22
TIP
21
N/C
20
NP
19
NP
18
NP
17
NP
16
NP
Pin Descriptions
PIN NAME DESCRIPTION
1 /DCD
/DCD is an active low output from the modem. /DCD indicates the presence of a valid carrier
signal.
2 /CTS
/CTS is an active low output from the modem. When hardware flow control is active, the modem
asserts /CTS to indicate that it can accept data from the terminal equipment on /TXD.
3 /RESET
/RESET is an active low input which initiates 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.
4 /DSR
/DSR is active low output from the modem. /DSR is forced active.
5 /RTS
/RTS is an active low input to the modem. When hardware flow control is active, /RTS indicates
to the modem that the host has data to send.
6 /DTR
/DTR is an active low input to the modem. The operation of /DTR is controlled by bit 15 of
register U70 and is normally disabled. When enabled /DTR indicates the Host is ready to
communicate. If /DTR is removed while the modem is on-line it will exit data mode and enter
command mode.
7 /RXD
/RXD provides the path for received data and modem responses to be sent from the modem to
the host terminal equipment.
8 /TXD
/TXD provides the path for transmitted data and modem commands to be passed from the host
terminal equipment to the modem.
XECOM
(3)
XE2420G
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