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SC14404CFLAG
SC14404CFLAG | |
|---|---|
| Manufacturer Part Number | SC14404CFLAG |
| Description | Processor, Complete Baseband Processor for DECT Handsets |
| Manufacturer | National Semiconductor |
| SC14404CFLAG datasheets |
|
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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 CompactRISC
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.
________________________________________________________________________________________________
System Diagram
T M
T M
Note: ACCESSBUS
, MICROWIRE
and CompactRISC
marks of National Semiconductor Corporation.
Copyright 2000 National Semiconductor Corp.
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 CompactRISC
(CR16B) with programmable clock speeds.
n 4k byte memory mapped Flash
n 320 kbyte Flash or factory programmed ROM FLASH.
n ACCESSBUS
or MICROWIRE
TM
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
TM
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.
T M
are trade-
1
PRELIMINARY
FEBRUARY 2000
Micro Controller.
T M
interfaces
T M
www.national.com
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|
SC14404CFLAG Summary of contents |
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