XE0068DT-ITR View Datasheet(PDF) - Xecom
Part Name
Description
Manufacturer
XE0068DT-ITR Datasheet PDF : 14 Pages
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XE0068DT Pin Descriptions
PIN NAME I/0 DESCRIPTION
1 VCC
--- +5 Volts
2-5 D0-D3
I/O These signals represent the 4-bit data bus which carries the DTMF information per
the chart below.
6 /WR
I Read and Write determine the direction of DTMF data. A low on /WR with /RD
high allows the processor to write to the XE0068DT.
7 /RD
I Read and Write determine the direction of DTMF data. A low on /RD with /WR
high allows the processor to read from the XE0068DT.
8 /CS
I A low on Chip Select, selects the XE0068 DTMF data bus.
9 RS0
I This input selects the register to be used. A low selects the data register and a high
slects the status or control registers.
13 D/V
I A low on Voice/Data selects a transmit level of 0 dBm for voice or DTMF; a high
sets a -9 dbm transmit level for data transfer.
14 GND
--- Ground
15 CP
O In DTMF mode CP acts as an interrupt. CP goes low when a valid DTMF Tone is
transmitted or received. In Call Progress Mode CP provides a square wave repre-
sentation of the call progress signal on the phone line.
16 ESt
O Goes high to indicate that a valid tone pair has been detected. A momentary loss of
signal causes ESt to go low.
17 St/GT
I/O As an input, St/GT latches the DTMF code into the Receive Data Register when the
threshold voltage is reached. As an output, St/GT goes high to disable the guard
timer after the threshold voltage is reached.
18 XMIT
I Analog input signal to the line interface, input impedance on XMIT is typically 10
Kohms at 1800 Hz. Signals from -15 to +5 dBm will be placed on the line at -
10dBm + 1 dBm.
19 RCVR
O Analog output signal from the 2-4 wire converter, the output impedence of RCVR
is typically 10 ohms at 1800 hz.
21 OH
I Hookswitch control. A high closes the internal relay to connect the equipment to
the phone line.
22 /RI
O Ring Indicate, output, active low, TTL, indicates the modem is receiving a ring sig-
nal.
24 Ring
--- Ring connection to the phone line (RJ11 Pin 4).
26 Tip
--- Tip Connection to the phone line (RJ11 Pin 3)
XECOM
(4)
XE0068DT
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