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SC14408 Datasheet

Complete Baseband Processor for DECT Handsets

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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 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


National Semiconductor Electronic Components Datasheet

SC14408 Datasheet

Complete Baseband Processor for DECT Handsets

No Preview Available !

1.0 Pin type definitions
PD7/P3[7]
PD1/P3[1]
PD5/P3[5]
PD4/P3[4]
PD3/P3[3]
PD2/P3[2]
VDD
VSS
RFCLK
VDDRF
VSSRF
Xtal1
CAP
AVS
AVD
RSSI
RDI
CMPREF
TDO
LE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SC14406BxxVV
SC14406BxxVD
SC14408B80VV
SC14408B80VD
60 LDO1_CTRL
59 LDO1_sense
58 ADC3 (battery current)
57 AVS_sense
56 DC_I
55 DC_Sense
54 DC_stab
53 VBAT3
52 P2[7] / DC_CTRL
51 stop_charge/P2[6]
50 P2[5] / SDA1
49 P2[4] / SCL1
48 P2[3] / PCM_D0 / ADC1
47 P2[2] / ADC0
46 P2[1] / PCM_DI / PWM1
45 VDD
44 VSS
43 P2[0] / PWM0
42 P1[7] / CHARGE
41 P1[6] / PON
14-03-2001
,2
www.national.com


Part Number SC14408
Description Complete Baseband Processor for DECT Handsets
Maker National Semiconductor
PDF Download

SC14408 Datasheet PDF






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