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MT9092 Datasheet

  • MT9092

  • ISO2-CMOS ST-BUS⑩ FAMILY Digital Telephone with HDLC (HPhon...

  • 42頁

  • MITEL

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廬
ISO
2
-CMOS ST-BUS鈩?FAMILY
MT9092
Digital Telephone with HDLC (HPhone-II)
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Programmable 碌-Law/A-Law codec and filters
Programmable CCITT (G.711)/sign-magnitude
coding
Programmable transmit, receive and side-tone
gains
DSP-based:
i) Speakerphone switching algorithm
ii) DTMF and single tone generator
iii) Tone Ringer
Differential interface to telephony transducers
Differential audio paths
Single 5 volt power supply
X.25 Level 2 HDLC data formatting
ISSUE 2
May 1995
Ordering Information
MT9092AP
44 Pin PLCC
-40擄C to +85擄C
Description
The MT9092 HPhone-II is a fully featured integrated
digital telephone circuit which includes an HDLC
data formatter. Voice band signals are converted to
digital PCM and vice versa by a switched capacitor
Filter/Codec. The Filter/Codec uses an ingenious
differential architecture to achieve low noise
operation over a wide dynamic range with a single
5V supply. A Digital Signal Processor provides
handsfree speaker-phone operation. The DSP is
also used to generate tones (DTMF, Ringer and Call
Progress) and control audio gains. Internal registers
are accessed through a serial microport conforming
to INTEL MCS-51鈩?specifications. The device is
fabricated in Mitel's low power ISO
2
-CMOS
technology.
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Applications
鈥?/div>
鈥?/div>
鈥?/div>
Fully featured digital telephone sets
Cellular phone sets
Local area communications stations
DSTo
DSTi
F0i
C4i
VSSD
VDD
VSSA
VSS
SPKR
VBias
VRef
Digital Signal Processor
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22.5/-72dB
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鈭?.5dB
AAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAA
Rx
AAAAAA
Tx &
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AAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAA
Filter/Codec Gain
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
7dB
AAAAAAAAAAAAAAAAAAAAAAAAA
ENCODER
AAAAAAAAAAAAAAAAAAAAAAAAA
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AAAAAAAAAAAAAAAAAAAAAAAAA
AAAA
DECODER
AAAAAAAAA
-7dB
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAA
MIC-
Transducer
Interface
MIC+
M-
M+
C-Channel
Registers
STATUS
Control
Registers
HSPKR+
HSPKR-
SPKR+
HDLC
SPKR-
Timing
Circuits
New Call
Tone
Generator
Serial
Port
(
MCS-51
Compatible)
LCD Driver
S/P &
P/S
Converter
DATA 2
DATA 1
SCLK
CS
IRQ
S1
S12
BP
WD PWRST IC
Figure 1 - Functional Block Diagram
7-3

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