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PDF SC14408 Data sheet ( Hoja de datos )
| Número de pieza | SC14408 | |
| Descripción | Complete Baseband Processor for DECT Handsets | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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May 2001
V 1.0
SC14408
Complete Baseband Processor for DECT Handsets
General Description
The SC14408 is a CMOS chip optimized to handle all the
audio, signal and data processing needed within a DECT
(1.9GHz) or in the 2.4GHz ISM digital band handset. An
ADPCM transcoder, a very low power CODEC and Ana-
log Frontend is integrated. Direct connections towards mi-
crophone and a (dynamical) loudspeaker are provided.
Duplex quality handsfree operation is integrated.
The SC14408 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.
Features
I Integrated DECT Baseband transceiver optimized for
GAP handsets according to ETS 300 175-2, 175-3 &
175-8.
I Two on board low drop voltage regulators with 2.5V and
3.0- 3.8V (with external resistors the voltage can be de-
termined) output.
I 2V upto 3.6V battery input with onboard step up con-
verter.
I Advanced battery management unit
I Very low power in active and paging mode.
I Embedded 16 bit CompactRISCTM Micro Controller.
(CR16B) with programmable clock speeds.
I 384 kbyte Flash.
I ACCESSBUSTM or MICROWIRETM interfaces
I 6 kilobyte on-chip Data Memory.
I One full duplex ADPCM transcoder.
I On-chip 14-bit linear CODEC.
I 14 upto 44 dB gain differential microphone input buffer.
I 80 Ω loudspeaker driver.
I Software controlled gain on audio input and output.
I Peak hold ADC for RSSI measurement.
I Five general purpose inputs can be multiplexed on an
8 bit ADC with selectable ranges.
I On-chip dedicated TDMA instruction co-processor
which supports DECT and ISM-bands providing 1.152
Mb/s, 1.024 Mb/s, 0.576 Mb/s, 0.512 Mb/s, 0.288 Mb/s
and 0.256 Mb/s.
I Seven programmable control signals for radio front
end.
I Full and double slot, protected and unprotected B-
fields.
I Duplex quality handsfree operation.
I Tone generator. Tones consisting of 3 frequencies can
be programmed
I Linear PCM interface for external codec.
I ISM band support with 8/9 x 10.368 Mc xtal = 9.216 Mc
I On chip LCD controller (6X30 segments)
Note: ACCESSBUSTM, MICROWIRETM and CompactRISCTM are trade-
marks of National Semiconductor Corporation.
________________________________________________________________________________________________
System Diagram
© 2001 National Semiconductor Corporation
1
www.national.com
1 page  
3.0 Product status definitions
National Semiconductor B.V reserves the right to make changes without notice to any products herein to improve reliability, function
or design. National does not assume any liability arising out of the application or use of any product or circuit described herein; neither
does it convey any license under its patent rights, nor the right of others.
________________________________________________________________________________________________
LIFE SUPPORT POLICY
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 AND GENERAL COUNSIL 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) sup-
port or sustain life, and whose failure to perform, when prop-
erly used in accordance with instructions for use provided in
the labeling, can be reasonably expected to result in a signifi-
cant injury to the user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or system, or to
affect its safety or effectiveness.
National Semiconductor
Corporation
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: [email protected]
National Semiconductor
Europe
Fax:
Email:
Deutsch Tel:
English Tel:
(+49) 0-180-530 85 86
(+49) 0-180-530 85 85
(+49) 0-180-532 78 32
National Semiconductor
Asia Pacific
Customer Response Group
Tel: 65-254-4466
Fax: 65-250-4466
Email: [email protected]
National Semiconductor
Japan Ltd.
Tel: 81-3-5620-6175
Fax: 81-3-5620-6179
National does not assume any responsibility for use of any circuitry described, no patent licences are implied and National reserves the right at any time without notice to
change said circuitry and specifications
5 www.national.com
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| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet SC14408.PDF ] | |
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