MT9094 Datasheet, PDF (1/32 Pages) Mitel Networks Corporation – ISO2-CMOS ST-BUS™ FAMILY Digital Telephone (DPhone-II)

ISO²-CMOS ST-BUS™ FAMILY MT9094
®
Digital Telephone (DPhone-II)
Features
• Programmable µ-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
Applications
• Fully featured digital telephone sets
• Cellular phone sets
• Local area communications stations
ISSUE 2
Ordering Information
May 1995
MT9094AP 44 Pin PLCC
-40°C to +85°C
Description
The MT9094 DPhone-II is a fully featured integrated
digital telephone circuit. 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™ specifications. The
device is fabricated in Mitel's low power ISO²-CMOS
technology.
DSTo
DSTi
F0i
C4i
VSSD
VDD
VSSA
VSS
SPKR
VBias
VRef
Digital Signal Processor
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA²AAAAAAAAAAAA^2T∆AAAAAAAAAAAA^.xAAAAAAAAAAAA⁵¹AAAAAAAAAAAA^/.&-5AAAAAAAAAAAA^{7AAAAAAAAAAAAdR2AAAAAAAAAAAABdAAAAAAAAAAAAxAAAAAAAAAAAAB}AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Filter/Codec Gain
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA^EDAAAAAAAAAAA^NEAAAAAAAAAAAAAAAAAAAAAA^CCAAAAAAAAAAA^OOAAAAAAAAAAAAAAAAAAAAAA^DDAAAAAAAAAAA^EEAAAAAAAAAAAAAAAAAAAAAA^{RRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA-}AAAAAAAAAAA⁷⁷AAAAAAAAAAA^ddAAAAAAAAAAA^BBAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Transducer
Interface
C-Channel
Registers
STATUS
Control
Registers
Timing
Circuits
LCD Driver
New Call
Tone
Generator
S/P &
P/S
Converter
Serial
Port
(MCS-51
Compatible)
S1 S12
BP
WD PWRST IC
Figure 1 Functional Block Diagram
MIC-
MIC+
M-
M+
HSPKR+
HSPKR-
SPKR+
SPKR-
DATA 2
DATA 1
SCLK
CS
7-45