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PDF SC14402 Data sheet ( Hoja de datos )
| Número de pieza | SC14402 | |
| Descripción | Complete Baseband Processor for DECT Handsets | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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PRELIMINARY
February 1998
SC14402
Complete Baseband Processor for DECT Handsets
General Description
Preliminary document version 1.5.
The SC14402 is a 3.0 Volt CMOS chip optimized to handle
all the audio, signal and data processing needed within a
DECT handset. An ADPCM transcoder, a very low power
CODEC and Analog Frontend is integrated. Direct con-
nections towards microphone and a (dynamical) loud-
speaker are provided.
The SC14402 is designed such that it is compatible with
many radio interfaces.
A dedicated TDMA controller handles all physical layer
slot formats and radio control.
National Semiconductors standard CompactRISCTM
CR16A 16 bit microcontroller with external ROM takes
care of all the higher protocol stack.
Features
s Integrated DECT Baseband transceiver optimized for
GAP handsets according to ETS 300 175-2, 175-3 &
175-8.
s 2.95 to 3.6 Volt operating voltage.
s Very low power in active and paging mode.
s Max 5V battery input.
s Embedded 16 bit CompactRISCTM Micro Controller.
(CR16A) with programmable clock speeds.
s ACCESSBUSTM or MICROWIRETM interfaces can be
handled.
s 4 kByte on-chip Data Memory.
s One full duplex ADPCM transcoder.
s On-chip 14-bit linear CODEC.
s 8 upto 38 dB gain differential microphone input buffer.
s 100 Ω loudspeaker driver.
s Software controlled gain on audio input and output.
s On-chip gaussian Modulator.
s Peak hold ADC for RSSI measurement.
s Three general purpose inputs can be multiplexed on an
8 bit ADC with selectable ranges.
s Advanced battery management unit
s On board dedicated TDMA instruction co-processor
(DiP).
s Eight programmable control signals for radio front end.
s Serial interface to control radio front end circuitry.
s Full support of all data formats.
________________________________________________________________________________________________
System Diagram
SC14401
SC14402
SC14422
ISDN or
PSTN
PSTN
Interface ISDN
SC14401
SC14402
SC14402
4220030
ACCESSBUSTM, MICROWIRETM and CompactRISCTM are trademarks of National Semiconductor Corporation.
Copyright 1998 National Semiconductor Corp.
1
www.national.com
1 page  
Table 1: Pin Description
PIN NAME
P1[5]
P1[6]
P1[7]
VDD
VSS
P2[0] or
PWM
P2[1] or
Buzzer+
P2[2] or
Buzzer-
P2[3]
P2[4]
VBAT2
VPP
VBAT1
TP
PON
CHARGE
REG_ON
P2[5]
Vref+
MIC+
AGND
MIC-
Vref-
LRS-
LRS+
AVD2
AVS2
DAC
CAP
Xtal1
VSS
VDD
RSTn
HOLD
TYPE DESCRIPTION
36 2 INPUT/OUTPUT with selectable pull up resistor and 12 mA drive current. General
purpose memory mapped I/O port bit. Can be programmed to generate an internal
interrupt.
37 2 INPUT/OUTPUT with selectable pull up resistor and 12 mA drive current. General
purpose memory mapped I/O port. Can be programmed to generate an internal
interrupt.
38 4 INPUT/OUTPUT with open drain with 12 mA sink capability. Can be used to control
a LED connected to Vbat. Can be programmed to generate an internal interrupt.
39 Digital supply voltage
40 Digital ground
41 4 INPUT/OUTPUT with open drain with 100mA sink capability. This pin can be con-
figured as single ended buzzer driver with Pulse Width Modulated (PWM) output.
Can also be used for battery charge control.
42 1 INPUT/OUTPUT. General purpose memory mapped I/O port bit. P2[1,2] can be
configured as complementary PWM output for e.g. buzzer control. P2[1,2] can
drive 12 mA.
43 1 INPUT/OUTPUT. General purpose memory mapped I/O port bit. P2[1,2] can be
configured as complementary PWM output for e.g. buzzer control. P2[1,2] can
drive 12 mA.
44 1 INPUT/OUTPUT. General purpose memory mapped I/O port bit.
45 1 INPUT/OUTPUT. General purpose memory mapped I/O port bit.
46 analog INPUT. Battery voltage. (upto 5V input)
47 Reserved for future onboard OTP ROM.
48 analog INPUT. Battery voltage. (upto 5V input)
49 INPUT. Testpin for production test must be connected to Vss.
50 analog INPUT. Power ON. Uses Vbat input supply.
51 analog INPUT. Charger connected indication. Uses Vbat input supply.
52 5 OUTPUT. Uses Vbat input supply. Switch external regulator on
53 5/analog DIGITAL OUTPUT/ANALOG INPUT. P2[5] 8 bit multiplexed ADC inputs. P2[5] can
also be used as a digital output
54 analog OUTPUT. Positive microphone reference
55 analog INPUT. Positive microphone input
56 analog POWER. Signal ground.
57 analog INPUT. Negative microphone input.
58 analog OUTPUT. Negative microphone reference
59 analog OUTPUT. Negative loudspeaker output
60 analog OUTPUT. Positive loudspeaker output
61 Analog supply voltage for CODEC, Xtal oscillator and 8 bit DAC (pin 63)
62 Analog ground.
63 analog 8 bit DAC output for frequency control.
64 analog External capacitor.
65 analog INPUT. 10.368MHz crystal connection.
66 Digital ground
67 Digital supply voltage
68 1 INPUT/OUTPUT. Active low Reset input with open collector output and pull down
resistor.
69 6 INPUT with pull down. Hold processor operation. For e.g. In Circuit Emulation. The
system bus interface will TRI-STATE data and address bus and all control signals.
In this mode an external CR16A can control the SC14402 completely.
Copyright 1998 National Semiconductor Corp.
5
www.national.com
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet SC14402.PDF ] | |
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