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PDF XE0068DT Data sheet ( Hoja de datos )
| Número de pieza | XE0068DT | |
| Descripción | FCC Registered DAA Module | |
| Fabricantes | Xecom | |
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XE0068DT
November 2004
FCC Registered DAA Module with DTMF Transmitter/Decoder
Description
The XE0068DT is an FCC registered telephone line
interface which includes a DTMF transmitter, DTMF
decoder and call progress monitor.
FCC rules limit the signal level that equipment can place
on the telephone line. The XE0068DT incorporates an
Automatic Gain Control (AGC) circuit to control the
output signal level. The AGC optomizes the output
levele over a wide variety of input levels without
introducing signal distortion.
FCC rules also dictate a 2-second delay at the start of
each call. This billing delay prevents information
transmission during the billing period. The XE0068DT
includes this billing delay.
The integrated DTMF transceiver, call progress monitor
and FCC registration make the XE0068DT ideal for
network signalling applications.
Features
* Small Size - 2.28" x 1.08" x 0.42"
* User Transferrable FCC Part 68 Registration
* Integrated Ring Detection Circuit.
* Solid-State Hookswitch Control
* Provides 1500 Volt Isolation between the tele-
phone line and all other circuits
* Includes supplemental surge protection to survive
both FCC Type A and Type B surges.
* Integral 2-Second Billing Delay (required for FCC
Part 68 registration)
* Automatic Gain Control optimizes transmit level
for most any input level.
* Integral DTMF transmitter and decoder
* Call Progress Monitoring
XE0068DT Block Diagram
XE0068DT Pin Configuration
D0
D1
D2
D3
ESt
/RD
/WR
/CS
RS0
CP
St/GT
DTMF
Transmitter
& Receiver
Line
Transformer
Hook Switch
Tip
Ring
OH
2-4 Wire
RCVR Convertor
XMIT
D/V
AGC
Ring
Detect
/RI
Billing Delay
Timer
VCC o 1
D3 o 2
D2 o 3
D1 o 4
D0 o 5
/WR o 6
/RD o 7
/CS o 8
RS0 o 9
N/C o 10
N/C o 11
N/C o 12
D/V o 13
26 o Tip
24 o Ring
22 o /RI
21 o OH
20 o N/C
19 o RCVR
18 o XMIT
17 o St/GT
16 o ESt
15 o CP
14 o GND
XECOM
(1) XE0068DT
1 page  
XE0068DT Register Selection
Table 1 below shows the combination of RS0, /WR, and /RD to select each register.
Table 1
RS0 /WR /RD
Function
001
Write to Transmit Data Register
010
Read from Receive Data Register
101
Write to Control Register A or B
110
Read from Status Register
DTMF Codes
Table 2 below shows the 4-bit codes applied to D0-D3 to represent each DTMF Digit.
Table 1
DTMF Digit 1 2 3 4 5 6 7 8 9 0 * # A B C D
D0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0
D1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0
D2 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 0
D3 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0
XE0068DT Status Register
Table 3 below defines the bit codess which can be read from the status register.
Table 3
Bit
Indicator
Status Set
0 IRQ An interrupt has occurred
1 Transmit Data Register
Empty
2 Receive Data Register
Full
3 Delayed Steering
Transmitter Ready for
New Data
Receive Data Register
contains valid data
Set upon detection
of the absence of a
DTMF signal
Status Cleared
Interrupt inactive, Cleared
after Status Register Read
Status has been read or
is in non-burst mode
Status Register has been
Read
Cleared upon detection of
a valid DTMF signal
XECOM
(5) XE0068DT
5 Page 
XE0068DT Write Timing
WR
CS/RS0
tas
Data Bus
tpwl tpwh
tah
tdsw tdhw
Signal
t
as
t ah
t pwl
t pwh
t dsw
t dhw
Definition
Address Setup Time
Address Hold Time
Write Pulse Width Low
Write Pulse Width High
Data Setup Time (Write)
Data Hold Time (Write)
Min Typ Max Units
23 nanoseconds
26 nanoseconds
150 nanoseconds
100 nanoseconds
45 nanoseconds
10 nanoseconds
XECOM
(11) XE0068DT
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet XE0068DT.PDF ] | |
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