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SC14404 Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer SC14404
Beschreibung Complete Baseband Processor for DECT Handsets
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 6 Seiten
SC14404 Datasheet, Funktion
PRELIMINARY
FEBRUARY 2000
SC14404
Complete Baseband Processor for DECT Handsets
General Description
The SC14404 is a CMOS chip optimized to handle all the
audio, signal and data processing needed within a DECT
handset. An ADPCM transcoder, a very low power CO-
DEC and Analog Frontend is integrated. Direct connec-
tions towards microphone and a (dynamical) loudspeaker
are provided. Duplex quality handsfree operation is inte-
grated.
The SC14404 is designed to fit to any radio design.
A dedicated TDMA controller handles all physical layer
slot formats and radio control.
National Semiconductors standard CompactRISCTM
CR16B 16 bit microcontroller takes care of all the higher
protocol stack. 4 kilobyte F lash is integrated for parameter
and number storage.
Features
n Integrated DECT Baseband transceiver optimized for
GAP handsets according to ETS 300 175-2, 175-3 &
175-8.
n Two on board low drop voltage regulators with 2.85V
and 3.0- 3.8V (with external resistors the voltage can be
determined) output.
n 2V upto 3.6V battery input with onboard step up con-
verter.
n 3V upto 5.0V battery monitor input.
n Advanced battery management unit
n Very low power in active and paging mode.
n Embedded 16 bit CompactRISCTM Micro Controller.
(CR16B) with programmable clock speeds.
n 4k byte memory mapped Flash
n 320 kbyte Flash or factory programmed ROM FLASH.
n ACCESSBUSTM or MICROWIRETM interfaces
n 5,5 kilobyte on-chip Data Memory.
n One full duplex ADPCM transcoder.
n On-chip 14-bit linear CODEC.
n 14 upto 44 dB gain differential microphone input buffer.
n 100 loudspeaker driver.
n Software controlled gain on audio input and output.
n Peak hold ADC for RSSI measurement.
n Five general purpose inputs can be multiplexed on an
8 bit ADC with selectable ranges.
n On-chip dedicated TDMA instruction co-processor
which supports 1.152 MHz, 0.576 MHz and 0.288 MHz
bit rates.
n Seven programmable control signals for radio front
end.
n Full and double slot, protected and unprotected B-
fields.
n Duplex quality handsfree operation.
n Tone generator. Tones consisting of 3 frequencies can
be programmed
n Linear PCM interface for external codec.
________________________________________________________________________________________________
System Diagram
Note: ACCESSBUST M, MICROWIRET M and CompactRISCT M are trade-
marks of National Semiconductor Corporation.
Copyright 2000 National Semiconductor Corp.
1
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SC14404 Datasheet, Funktion
3.0 Product status definitions
Definition of Terms
Data Sheet
Identification
Advance Information
Preliminary
No Identification Noted
Obsolete
Product Status
Definition
Formative or In Design
First Production
Full Production
Not In Production
This data sheet contains the design specifications for product
development. Specifications may change in any manner without
notice.
This data sheet contains preliminary data. Supplementary data will
be published at a later date. National Semiconductor Corporation
reserves the right to make changes at any time without notice in
order to improve design and supply the best possible product.
This data sheet contains final specifications. National Semiconduc-
tor Corporation reserves the right to make changes at any time
without notice in order to improve design and supply the best possi-
ble product.
This data sheet contains specifications on a product that has been
discontinued by National Semiconductor Corporation. The datash-
eet is printed for reference information only.
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the body,
or (b) support or sustain life, and whose failure to per-
form, when properly used in accordance with instructions
for use provided in the labeling, can be reasonably ex-
pected to result in a significant injury to the user.
2. A critical component is any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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Copyright 2000 National Semiconductor Corp.
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