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SC14428 Baseb
and Processo
r
fo
r FP & PP DECT and WDCT
2004 National Semiconductor Corporation
www.national.com
ADVANCED INFORMATION
March 2004
SC14428
Baseband Processor for FP & PP DECT and WDCT
1.0 General description
.The SC14428 is a CMOS IC optimized to handle all the
audio, signal and data processing needed within a DECT
(1.9 GHz) or 2.4GHz ISM digital band base stations and
handsets.
A four channel ADPCM transcoder, a very low power 16 bit
Codec and Analog Frontend are integrated. Direct connec-
tions towards PSTN or ISDN line interface are possible.
The SC14428 has a programmable Generic DSP opti-
mized for telecom applications.
The SC14428 is designed to fit to any radio interface. A
dedicated TDMA controller handles all physical layer slot
formats and radio control.
National Semiconductor's standard CompactRISC
TM
CR16C microprocessor takes care of all the higher protocol
stack.
2.0 Features
Complies with DECT ETS 300 175-2,3 & 8 SWAP-CA
V1.3 Rev 1.3 20000616
1.8Volt operating voltage with 2.65V (typ) IO pads.
Two chip low drop voltage regulators
16 bit CompactRISCTM CR16C Microprocessor with
programmable clock speeds up to 20.736 MHz.
Four channel DMA controller.
Serial Debug interface, Nexus Class-1 compliant.
16kbyte shared, 6kbyte non shared RAM
4kbyte shared RAM for TAM DSP
Versions with ROM, FLASH and data FLASH
Programmable 16 bits system bus interface with bus
master and slave operation.
User programmable GENeric DSP with fixed telecom
processing routines.
Four full duplex 32 kbits/sec ADPCM transcoder.
On-chip Dedicated Instruction Processor (DiP) for all
TDMA based events, which supports DCT 1.152MHz,
0.576MHz and 0.288MHz data rates.
ISM band and DECT with 9.216, 10.368 and 13.824 MHz
xtals.
Protected and unprotected full and double slot B-fields
Flexible 1.152 Mbit/sec three wire interface to radio front
synthesizer.
One 16-bit linear CODEC
Selectable Fast Antenna Diversity operation or RSSI
measurement with peak hold ADC.
Three input general purpose 8 bit ADC
Two general purpose timers and watch dog timer.
Two Capture timers for frequency measurement for e.g.
metering, ringing and call progress tone detection.
Three general purpose I/O ports with two edge/level pro-
grammable interrupts
Full duplex UART and MICROWIRE
TM
interface.
SPI
TM
interface (Master/Slave).
Flexible 8 kHz synchronous Serial interface to external
codecs and ISDN interface circuits.
Three programmable chip selects
Integrated opamp for caller-id
(80 pin PFQP and 80,)128,160 pins TQFP packages.
3.0 System Diagram
CompactRISC
TM
is a trademark of National Semiconductor Corporation
SC14428
ISDN OR
DATA
INTERFACE
PSTN
INTERFACE
PSTN
INTERFACE
SC14428
CID
HANDSFREE
ISDN
PSTN1
PSTN2
SC14428
SC14428
SC14428
SC14428
www.national.com
2
(Confidential) Revision 1.0
LMX9820
3.0 System Diagram
(Continued)
Figure 1. SC14428 Block diagram
TIMERS
8 BIT
ADC
P2[7-0]
SCALER
ACCESS
BUS2
P1[7-0]
P0[7-0]
PWM
ACCESS
BUS1
UART
DMA
SYSTEM BUS
INTERFACE
16 BITS
16 BITS
BOOT
ROM
CR16C COMPACTRISC
16 BIT MICRO CONTROLLER
DATA
RAM
SHARED
RAM
6KBYTE
16KBYTE
DEDICATED INSTRUCTION
PROCESSOR
GENDSP
CODEC
ADPCM
ENCRYP
TION
RF
CONTROL
PINS
BMC
8 BIT DAC
GAUSSIAN
SHAPER
CLOCK
RECOVERY
3 BITS
FIR FILTER
MICRO
WIRE
TE
MP
ER
ATU
R
E
SE
NS
OR
HEADSET
30W
XTAL
TRIMMING
FLASH/
CLOCK
DIVIDER
SCLK
RF INTERFACE
AFE
MICRO CODE
RAM
1 KBYTE
DC/DC CONVERTOR
BATTERY & CHARGE
2X VOLTAGE
CONTROL
REGULATOR
ICU
DATA
IRDA
8 KBYTE
FLASH
1->5
PCM
IF
PSTN
ISDN,
IF
CODEC
SDI+
PLL
P3[7-1]
MUX
SPI
ROM
Revision 1.0 (Confidential)
3
SC14428
4.0 Specifications
All min/max specification limits are guaranteed by design, or production test, or statistical methods.
Table 1. ABSOLUTE MAXIMUM RATINGS
1
1.Absolute maximum ratings are those values that may be applied for maximum 50 hours.
Beyond these values, damage to the device may occur.
Parameter
Description
Conditions
Min
Max
Units
Vbat1_max
Max Battery supply voltage VBAT1
5.5
V
Vbat2_max
Max Battery supply voltage VBAT2
5.5
V
Ibat1_max
Max negative current into VBAT1
300
mA
Ibat2_max
Max negative current into VBAT2
300
mA
Ivddiotot_max
Max total current into VDDIOs
90
mA
Ivddio_max
Max current through I/O pins
20
mA
Vdd_max
Max Core supply voltage
(VDD-VSS / AVD-AVS / AVD2-AVS / VDDRF-VSSRF)
2.0
V
Vddiof_max
Max I/O Supply voltage for devices with FLASH
(VDDIO-VSS)
Note
2
2.A voltage between 2.8V and 3.0V may applied for a maximum time of 1 hour in order to guarantee the de-
vice specifications.
3.0
V
Vddio_max
Max I/O supply voltage for devices without FLASH
(VDDIO-VSS)
Note
3
3.A voltage between 3.3V and 3.6V may applied for a maximum time of 50 hours in order to guarantee the
device specifications.
3.6
V
Vldo1_ctrl_max
Max voltage on pin LDO1_CTRL
Note
4
4.For LDO1_CTRL, LDO2_CTRL, with 5V input protection, VDD must be between 1.75V and 2.0V or Vbat 1
>2.0V or Vbat2>2.8V.
VSS-0.3
5.25
V
Vldo2_ctrl_max
Max voltage on pin LDO2_CTRL
Note
4
VSS-0.3
5.25
V
Vpon_max
Max voltage on pin PON
VSS-0.3
2.85
V
Vcharge_max
Max voltage on pin CHARGE
VSS-0.3
2.85
V
Vbat3_max
Max voltage on pin VBAT3
VSS-0.3
2.85
V
Vadc1_max
Max voltage on pin ADC1
VSS-0.3
2.85
V
Vrdidig_max
Max voltage on pin RDI digital mode (max 3.6V)
VSS-0.3
VDDIO+0.3
V
Vrdiana_max
Max voltage on pin RDI analog mode
VSS-0.3
2.0
V
Vdig_max
Max voltage on digital Input pins (max 3.6V)
VSS-0.3
VDDIO+0.3
V
Vana_max
Max voltage on any other input (incl analog pads)
VSS-0.3
2.0
V
Iprot_max
Max current through prot. diodes on any pin to VDDIO
100
mA
Iprotcid_max
Max current through prot. diode pins CID+/- to AGND
1.0
mA
Iprotmic_max
Current through prot. diode pin MIC+/- to AGND
2.4
mA
Iprotpon_max
Max current through prot. circuit of PON pin.
Note
5
0.6
mA
Iprotcharge_max
Max current through prot. circuit of CHARGE pin.
Note
5
0.6
mA
Iprotvbat3_max
Max current through prot. circuit of VBAT3 pin.
Note
5
0.6
mA
Iprotadc1_max
Max current through prot. circuit of ADC1 pin.
0.6
mA
Tstorage
Storage temperature
-65
+150
C
Ppackage
Package power dissipation @ 25 C
500
mW
Ilu
Latch-up current all pins according JEDEC 78
TA = 65 C
100
mA
Ilu_rdi_25
Latch-up current RDI pin
TA = 25 C
100
mA
Ilu_rdi_60
Latch-up current RDI pin
TA = 65 C
50
mA
Vesd_mm
ESD voltage according to man machine model
100
V
Vesd_hbm
ESD voltage according to human body model
1000
V
www.national.com
4
(Confidential) Revision 1.0
LMX9820
4.0 Specifications
(Continued)
5.The protection current can be calculated as follows:
In case P1[6]/PON, P1[7]/CHARGE, VBAT3, P2[3]/ADC1 is input, Iprotxxx_max = (Vext -
2.55)/(500+Rext)
Rext is an external resistor which is needed if the external voltage Vext exceeds the 2.8V.
(A lower protection current value of e.g. 100 uA is recommended in case power saving is important)
In case P1[6]/PON, P1[7]/CHARGE , P2[3]/ADC1 is output, Iprotxxx_max = (VDDIO - 2.55)/(500)
Table 2. OPERATING CONDITIONS
1
1.Within the specified limits, a life time of 10 years is guaranteed.
PARAMETER
DESCRIPTION
CONDITIONS
MIN
TYP
MAX
UNITS
Vbat1
Battery supply voltage VBAT1-AVS
2.0
5.0
V
Vbat2
Battery supply voltage VBAT2-AVS
2.8
5.0
V
Vdd
Digital core supply voltage
VDD-VSS
Note
2
2.Full operating mode; the differences between AVD, VDD may never be more than 300mV; during a
short period of time e.g. during power up more than 300mV difference is allowed. Analog performance
is only guaranteed from 1.75-1.98V
1.75
1.8
1.98
V
Avd
Analog core supply voltage
AVD-AVS
Note
2
1.75
1.8
1.98
V
Avd2
Analog core supply voltage
AVD2-AVS
Note
2
1.75
1.8
1.98
V
Vddrf
Analog xtal and RFCLK supply
voltage VDDRF-VSSRF
Note
2
1.75
1.8
1.98
V
Vddiof
Digital I/O supply voltage VDDIO-VSS
for devices with FLASH
2.5
2.65
2.8
V
Vddio
Digital I/O supply voltage VDDIO-VSS
for devices without FLASH
1.75
3.3
V
Vdcs
Voltage on DC_Sense pin
2.0
V
Vpon
Voltage on PON
All states
3
2.8
V
Vcharge
Voltage on CHARGE
All states
3
2.8
V
Vbat3
Voltage on VBAT3
Note
3
2.8
V
Vadc1
Voltage on ADC1
Note
3
2.8
V
Vprot_mic
Voltage on pins MICn, CIDp/n if protec-
tion enabled
Note
4
0.4
1.4
V
Iprotpon
Current through protection circuit of PON
pin.
Note
3
0.5
mA
Iprotcharge
Current through protection circuit of
CHARGE pin.
Note
3
0.5
mA
Iprotvbat3
Current through protection circuit of
VBAT3/RINGING pin.
Note
3
0.5
mA
Iprotadc1
Current through protection circuit of
ADC1 pin.
Note
3
0.5
mA
Vldo1_ctrl
Voltage on LDO1_CTRL
5.0
V
Vldo2_ctrl
Maximum voltage on LDO2_CTRL
5.0
V
Fpll_range
PLL operating range
28
48
MHz
TA
Ambient temperature
Note
5
-10
60
C
Revision 1.0 (Confidential)
5
SC14428
5.0 Product Status Definitions
6.0 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.
3.The protection current can be calculated as follows:
In case P1[6]/PON, P1[7]/CHARGE, VBAT3, P2[3]/ADC1 is input,
Iprotxxx_max = (Vext - 2.55)/(500+Rext)
Rext is an external resistor which is needed if the external voltage Vext exceeds the 2.8V.
(A lower protection current value of e.g. 100 uA is recommended in case power saving is important)
In case P1[6]/PON, P1[7]/CHARGE , P2[3]/ADC1 is output, Iprotxxx_max = (VDDIO - 2.55)/(500)
4.For pads with the protection circuit enabled, the protection current must be limited with external
source resistor Rext if the input voltage exceeds 0.4V resp 1.4V. Rext can be calculated as follows:
Rext >(Vext-1.4)/Iprotxxx).
5.Within this temperature range full operation is guaranteed.Upto +70 degrees Celsius analog perfor-
mance is not guaranteed.
Datasheet Status
Product Status
Definition
Advance Information
Formative or in Design
This data sheet contains the design specifications for
product development. Specifications may change in any
manner without notice.
Preliminary
First Production
This data sheet contains preliminary data. Supplementa-
ry data will be published at a later date. National Semi-
conductor Corporation reserves the right to make
changes at any time without notice in order to improve
design and supply the best possible product.
No Identification Noted
Full production
This data sheet contains final specifications. National
Semiconductor Corporation reserves the right to make
changes at any time without notice in order to improve
design and supply the best possible product.
Obsolete
Not in Production
This data sheet contains specifications on a product that
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