XE0068DT Cermetek Microelectronics, XE0068DT Datasheet - Page 7

• Manufacturer Part Number: XE0068DT
• Manufacturer: Cermetek Microelectronics

Specifications of XE0068DT

• Lead Free Status / Rohs Status: Supplier Unconfirmed

XE0068DT Operational Modes
Initialization Procedure
Call Progress Tone Definitions
The chart below shows the signal characteristics for the most common call progress tones in the United States.
Check the frequency and cadence on the CP line to identify signals in Call Progress mode.
Call Progress Mode Call Progress Mode allows detection of the various tones used to identify the status of a call.
Partial Dial Tone
Burst Mode
Single Tone Generation The XE0068DT may be used to generate single tones as well as tone pairs. Control
XECOM
Description
Read Status Register
Write to Control Register
Write to Control Register
Write to Control Register
Write to Control Register
Write to Control Register
Read Status Register
* Performs a software reset on the XE0068DT
Busy Tone
Dial Tone
Ringback
Reorder
Tone
Frequency (Hz)
Burst mode is used to transmit DTMF signals of specific duration. The XE0068DT transmitter
sends symmetric tone bursts which are on for 51 milliseconds and off for 51 milliseconds. This
is a standard interval for central office switching. When call progress mode is also selected ex-
tended bursts of 102 milliseconds can be sent.
350 + 400
440 + 480
480 + 620
480 + 620
They include Ring Back, Busy Tone Dial Tone, etc. In call Progress Mode the XE0068DT
provides a square wave representation of these signals on the CP pin. The system host can de-
code the incoming call progress tones.
480
Register B regulates single tone transmission.
.25 sec. On
.25 sec Off
.5 sec. On
4 sec. Off
.5 sec Off
2 sec. On
Cadence
Steady
Steady
RS0
1
1
1
1
1
1
1
Control Lines
WR
1
0
0
0
0
0
1
-13 dBm
-19 dBm
-24 dBm
-24 dBm
-17 dBm
Level
RD
(7)
0
1
1
1
1
1
0
Description
Indicates the network is ready to receive dialing
signals
Indicates the called line is ringing
Indicates the called line has been reached but is
currently in use.
Indicates the switching path is busy
Notifies the calling party that dialing has not begun
in the allotted time or that not enough digits have
been dialed.
D3
X
X
0
0
1
0
0
Data Bits
D2
X
X
0
0
0
0
0
D1
X
X
0
0
0
0
0
D0
X
X
0
0
0
0
0
XE0068DT