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SC14404 Datasheet

Complete Baseband Processor for DECT Handsets

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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
www.national.com


National Semiconductor Electronic Components Datasheet

SC14404 Datasheet

Complete Baseband Processor for DECT Handsets

No Preview Available !

1.0 CONNECTION DIAGRAMS
AD18
PD7
PD1
PD5
PD4
PD3
PD2
VDD
V SS
RFCLK
VDDRF
DAC
Xtal1
CAP
AVS
AVD
RSSI
RDI
CMPREF
TDO
LE
SO
SK
PC M _FSC/PD6 /ADC3
PCM_CLK /DAC2/ADC2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
SC14404
75 DAB1
74 DAB0
73 AD0
72 AD1
71 AD2
70 AD3
69 RSTN
68 AVS2
67 AVD2
66 LRS+
65 LRS-
64 VREF-
63 MIC-
62 AGND
61 MIC+
60 VREF+
59 VBAT1
58
VBAT2
DC_DIS
57 VBAT3
56 DC_stab
55 P2[6] DC_I
54 DC_Sense
53 LDO_Sense
52 LDO2_CTRL
51 LDO1_CTRL
Order Number SC14404BFLAG (320kbyte Full FLASH, Boot mode A, 100 pins TQFP,
Order Number SC14404BFLBG (320kbyte Full FLASH, Boot mode B, 100 pins TQFP
Order Number SC14404BxxAG (320kbyte ROM FLASH, Boot mode A , 100 pins TQFP)
Order Number SC14404BxxBG (320kbyte ROM FLASH, Boot mode B, 100 pins TQFP)
See NS Package Number VJG100A
Copyright 2000 National Semiconductor Corp.
2
www.national.com


Part Number SC14404
Description Complete Baseband Processor for DECT Handsets
Maker National Semiconductor
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SC14404 Datasheet PDF






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