參數(shù)資料
型號(hào)： M34116B1
廠商： 意法半導(dǎo)體
英文描述： PCM CONFERENCE CALL AND TONE GENERATION CIRCUIT
中文描述： 的PCM電話會(huì)議和音產(chǎn)生電路
文件頁(yè)數(shù)： 1/23頁(yè)
文件大小： 374K
代理商： M34116B1
M34116
PCM CONFERENCE CALL
AND TONE GENERATION CIRCUIT
PRELIMINARY DATA
HW AND SW COMPATIBLEWITH M116
1 TO 64 SERIAL CHANNELS PER FRAME
(CONTROLLED BYSYNC SIGNAL PERIOD)
29 MAXIMUMCONFERENCES
1 TO 64 SERIAL CHANNELS PER CONFER-
ENCES
3
SIMULTANEOUS
OPERATION MODES
AVAILABLE:
CONFERENCE, TRANSPARENT AND TONE
GENERATION
TYPICALBIT RATES:
1536/1544/2048/4096Kbits/s
COMPATIBLE WITH ALL KINDS OF PCM
FORMAT
μ
ANDA LAW (PIN PROGRAMMABLE)
EQUAL PRIORITYTO EVERY CHANNEL
ONE FRAME AND ONE CHANNEL DELAY
FROMSENDING TO RECEIVING
OVERFLOWINFORMATION FOR EACHCON-
FERENCE BY PIN OS (OVERFLOW SIGNAL-
LING) AND ON DATA BUS ON MPU RE-
QUEST
INSTRUCTION SETCOMPATIBLEWITHM3488
PROGRAMMABLE INPUT AND OUTPUT AT-
TENUATION OR GAIN FROM 0 TO 15dB
WITHSTEP OF 1dB FOR EACH CHANNEL
TONE
GENERATION
3938HzWITH MIN. STEP OF 3.9Hz
TOTAL OF 7 DIFFERENT TONE OUTPUTS
IN PARALLEL PROGRAMMABLE VIA MPU
(MAXIMUM 4 DIFFERENT FREQUENCIES
AND DURATIONS)
1 MELODY OF MAXIMUM 32 PROGRAMMA-
BLE FREQUENCIES AND DURATIONS
5V POWER SUPPLY
TTL
COMPATIBLE
CMOS/TTL COMPATIBLE OUTPUT LEVELS
MAIN INSTRUCTIONS CONTROLLED BY MI-
CROPROCESSOR INTERFACE:
– Channelconnectionto a conference
– Channelattenuation or gain
– Channeldisconnectionfrom both conference
andtransparentmodes
– Tone and melodygeneration
– Overflowstatus
– Operatingmode
– Channelstatus
FROM
3.9Hz
TO
INPUT
LEVELS,
DESCRIPTION
The M34116 is a productspecifically designedfor
applications in PCM digital exchanges. It is able
to handle up to 64 channels in any conferences
combination from 1 to 29 conferences in parallel
and to generate seven different tones and one
melody.
The parties in a conferencemust previouslybe al-
located through the Digital Switching Matrix
(M3488) in a single serial wire at M34116 PCM
input (IN PCM pin).
The M34116 is full pin and function compatible
with the M116. In addition, it has the capability to
generatetone directly coded in PCM.
For the conference function, each channelis con-
verted inside the chip from PCM law to linear law
(14 bits). Then it is added to its conference, and
the sample of the previous frame is subtracted
from the conference.
In this way a new conferencesum signal is gener-
ated.
The channel output signal will contain the infor-
mation of all the other channels in its conference
exceptits own.
After the PCM encoding, the data is serialized by
the M34116 in the same sequence as the PCM
input frame, with one frame (plus one channel)
delayand will be reallocated by the DSM (M3488)
at the final channel andbus position.
A programmable attenuation or gain can be set
on each channel and for every function: confer-
ence, tone generationand transparentmode.
This isadvanced information on anew product now in development or undergoing evaluation. Details are subject to change without notice.
January 1995
DIP24
ORDERING NUMBER:
M34116B1
PLCC28
ORDERING NUMBER
: M34116C1
1/23
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