MT9092 Datasheet, PDF (1/42 Pages) Mitel Networks Corporation – ISO2-CMOS ST-BUS™ FAMILY Digital Telephone with HDLC (HPhone-II)

ISO²-CMOS ST-BUS™ FAMILY MT9092
®
Digital Telephone with HDLC (HPhone-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
• X.25 Level 2 HDLC data formatting
Applications
• Fully featured digital telephone sets
• Cellular phone sets
• Local area communications stations
ISSUE 2
Ordering Information
May 1995
MT9092AP 44 Pin PLCC
-40°C to +85°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™ 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
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA^{2AAAAAAAAAAAA2TAAAAAAAAAAAA∆.}AAAAAAAAAAAA^x51AAAAAAAAAAAA^/.&AAAAAAAAAAAA^-57AAAAAAAAAAAA^dR2AAAAAAAAAAAA^BAAAAAAAAAAAA^dxAAAAAAAAAAAA^BAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Filter/Codec Gain
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA^EDAAAAAAAAAAA^NAAAAAAAAAAA^EAAAAAAAAAAA^CCAAAAAAAAAAA^OAAAAAAAAAAA^OAAAAAAAAAAA^DDAAAAAAAAAAA^EAAAAAAAAAAA^EAAAAAAAAAAA^RRAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA^-77AAAAAAAAAAA^ddAAAAAAAAAAA^BAAAAAAAAAAA^BAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
Transducer
Interface
C-Channel
Registers
HDLC
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
IRQ
7-3