Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

AD6421AST Scheda tecnica(PDF) 4 Page - Analog Devices

Il numero della parte AD6421AST
Spiegazioni elettronici  GSM/DCS1800/PCS1900 Baseband Processing Chipset
Download  8 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

AD6421AST Scheda tecnica(HTML) 4 Page - Analog Devices

  AD6421AST Datasheet HTML 1Page - Analog Devices AD6421AST Datasheet HTML 2Page - Analog Devices AD6421AST Datasheet HTML 3Page - Analog Devices AD6421AST Datasheet HTML 4Page - Analog Devices AD6421AST Datasheet HTML 5Page - Analog Devices AD6421AST Datasheet HTML 6Page - Analog Devices AD6421AST Datasheet HTML 7Page - Analog Devices AD6421AST Datasheet HTML 8Page - Analog Devices  
Zoom Inzoom in Zoom Outzoom out
 4 / 8 page
background image
AD20msp415
–4–
REV. 0
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the AD20msp415 features proprietary ESD protection circuitry, permanent damage
may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
Generation of Auxiliary Audio Signals
Under control of Layer 1, the GSMP can generate a variety of
fixed and user-programmable tones. This includes all standard
DTMF and Call Progress tones as well as user defined tones.
The tone structure can consist of up to four frequency compo-
nents with individual durations. The GSMP also generates
Talker Sidetone as specified in the GSM recommendations. In
comparison to traditional hardware implementations, this soft-
ware implementation provides manufacturing flexibility over a
wide range of speaker/microphone sensitivities.
AD6421
SERIAL
VOICE
PORT
SERIAL
AUXILIARY
PORT
AUXILIARY ADC
FILTER
FILTER
ADC
PGA
MUX
CAR
KIT
U BAT
TEMP
OTHER
ADC
PGA
MUX
MUX
Figure 3. Audio/Auxiliary Section of the AD6421
Figure 3 shows the audio section and the auxiliary ADC of the
VBC. Input signals can come from either a directly connected
microphone or from a remote microphone in a car kit. Input
gain can be set to 0 dB or +26 dB. The output signal can be
directly connected to a small earpiece and, for further amplifica-
tion, to an external car kit. The output PGA can be programmed
for –15 dB or +6 dB.
DATA SERVICES
Data Services is considered to be an essential feature for GSM
terminals and the AD20msp415 chipset is designed to provide
flexible and low cost implementation of Data Services supported
via the GSM air interface.
The selected system architecture shown in Figure 4 provides for
minimum terminal Bill of Materials, the lowest possible number
of interconnection points and the lowest power consumption
when running speech traffic only. The GSMP performs full
channel coding and decoding for TCH/F9.6, TCH/F4.8 and
TCH/F2.4 data rates. The interface to the chipset is a user-
configurable, 3-wire synchronous or asynchronous serial inter-
face supplying V110´ data packets as defined in GSM 05.03,
combined with protocol information and control to the Applica-
tion Layer.
External to the terminal is the Data Terminal Adapter (DTA)
that runs the Data Services Software. Included in the DTA are
the rate adaptation functions and the Data Services application.
The Command Interpreter resident on the mobile supports a
serial interface protocol with the DTA by which both traffic data
and control information are communicated.
V110'
FRAMES
MAN MACHINE INTERFACE
DATA APPLICATION
LAYER 2 RELAY (L2R)
RADIO LINK PROTOCOL (RLP)
RATE ADAPTION
EXTERNAL
DATA TERMINAL
ADAPTER
HANDSET
APPLICATION LAYER
FOREGROUND
COMMAND
INTERPRETER
FRAME
ROUTER
DATA TERMINAL
ADAPTER
APPLICATION LAYER
BACKGROUND
PROTOCOL STACK
LAYERS 2/3
PROTOCOL STACK
LAYER 1
AD20msp415
CHIPSET
Figure 4. Implementation of Data Services
SOFTWARE IMPLEMENTATIONS
A full implementation of the GSM Layer 1 functionality is sup-
plied as an object code module, for execution on the controller,
embedded in the GSMP. Functions performed by this software
include:
• Initial scan of GSM/E-GSM/PCN band and selection of
strongest thirty channels as required by 03.22 and 05.08.
• Mobile oscillator adjustment, timing synchronization and
BCCH decoding from serving cell (camping-on).
• Base station frequency and timing measurements and BSIC
extraction from neighbor cells under control of Layer 3.
• Frequency hopping according to 05.02.
• Full implementation of discontinuous reception (DRX) and
transmission (DTX).
• Reporting of received level and signal quality.
• Full engineering and test mode support.
• Support for all phase 1 and phase 2 handover modes.
• SIM Interface driver.
• Message interfacing to Layer 3 (Radio Resources Manager)
and Layer 2 (data link layer, both signaling and data).
• External functions for AGC, AFC and synthesizer setting are
called by Layer 1. These allow the user to configure the sys-
tem for a wide range of radio architectures.
The higher layers of the protocol stack also reside on this em-
bedded processor.
WARNING!
ESD SENSITIVE DEVICE


Codice articolo simile - AD6421AST

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Analog Devices
AD642 AD-AD642 Datasheet
395Kb / 6P
   Precision, Low Cost Dual BiFET Op Amp
REV. 0
AD6426 AD-AD6426 Datasheet
506Kb / 50P
   Enhanced GSM Processor
Revision Preliminary 2.3
AD6426XB AD-AD6426XB Datasheet
506Kb / 50P
   Enhanced GSM Processor
Revision Preliminary 2.3
AD6426XST AD-AD6426XST Datasheet
506Kb / 50P
   Enhanced GSM Processor
Revision Preliminary 2.3
AD642J AD-AD642J Datasheet
395Kb / 6P
   Precision, Low Cost Dual BiFET Op Amp
REV. 0
More results

Descrizione simile - AD6421AST

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
Analog Devices
AD20MSP410 AD-AD20MSP410 Datasheet
62Kb / 8P
   GSM Baseband Processing Chipset
REV. 0
logo
National Semiconductor ...
LMX2604 NSC-LMX2604 Datasheet
268Kb / 14P
   Triple-band VCO for GSM900/DCS1800/PCS1900
logo
TriQuint Semiconductor
TQ1422 TRIQUINT-TQ1422 Datasheet
132Kb / 6P
   GSM850/900 and DCS1800/PCS1900 Tx - Bandpass Filter
logo
RF Micro Devices
RF7161 RFMD-RF7161 Datasheet
871Kb / 20P
   QUAD-BAND GSM850/EGSM900/DCS1800/PCS1900 TRANSMIT MODULEThe
logo
Maxim Integrated Produc...
MAX2651 MAXIM-MAX2651 Datasheet
466Kb / 16P
   GSM900 and DCS1800/PCS1900 Dual-Band, Low-Noise Amplifiers
19-1506; Rev 1; 10/99
logo
Mitsubishi Electric Sem...
BA01303 MITSUBISHI-BA01303 Datasheet
88Kb / 3P
   Triple Band(EGSM900/DCS1800/PCS1900) InGaP HBT Front-end module
logo
Texas Instruments
DBB03A TI-DBB03A Datasheet
114Kb / 9P
[Old version datasheet]   Baseband ASIC for Dolphin Chipset
DBB03 TI-DBB03 Datasheet
98Kb / 8P
[Old version datasheet]   Baseband ASIC for Dolphin Chipset
logo
NXP Semiconductors
PCF5083 PHILIPS-PCF5083 Datasheet
602Kb / 136P
   GSM signal processing IC
1996 Oct 29
logo
Broadcom Corporation.
ML2011 BOARDCOM-ML2011 Datasheet
130Kb / 1P
   GSM SINGLE-CHIP BASEBAND PROCESSOR
More results


Html Pages

1 2 3 4 5 6 7 8


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com