AnyDATA DT2000-Dual User manual

CDMA DATA TERMINAL
DT2000-Dual Reference Manual
Application Information
October 2, 2002
01-DT2000-Dual-1 X3
AnyDATA.NET
AnyTime AnyPlace Any Wireless DataSolutions
International Contact
United Computer&
Telecommunication Inc.
18902 BardeenAve
Irvine,CA92612-1522, U.S.A.
e-mail: [e-mail]
Korea Contact
AnyDATA.NET
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Byulyang-dongKwachon,
Kyunggi-do,Korea
e-mail: [e-mail]

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Notice
All data andinformationcontainedinordisclosedbythisdocumentareconfidentialand proprietary
informationof AnyDATA.NETInc.,andall rights therein are expresslyreserved. Byacceptingthis
material, therecipientagreesthat thismaterial andtheinformationcontainedtherein are heldin
confidence andin trust andwill notbeused, copied, reproduced,or distributed in whole or inpart, norits
contents revealed in anymannertoothers without the express written permission of AnyDATA.NETInc.
AnyDATA.NET Inc. does not assume anyliabilityarisingout of the application oruse of its products.
AnyDATA.NETInc. assumes no responsibilityforanydamageorloss resulting fromthe misuse ofits
products. AnyDATA.NETInc. assumes no responsibilityforanyloss orclaims bythirdparties, which
mayarise throughtheuse ofits products. AnyDATA.NETInc. assumesnoresponsibilityforanydamage
or loss caused bythe deletion or loss ofdata as a result ofmalfunctions or repairs.
The informationcontainedinthis documentis subject tochangewithout notice. Informationcontained
hereinisforreference onlyanddoes notconstitute acommitmentonthepartof AnyDATA.NETInc.
Althoughtheinformation in this documenthas been carefullyreviewedandit sbelievedtobereliable,
AnyDATA.NETInc. assumes noresponsibilityor liabilityfor anyerrors orinaccuracies that mayappear
in thisdocument norare theyin anywayresponsible foranyloss ordamage resultingfrom theuse (or
misuse) ofthis document.

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Contents
1Introduction
1.1 Purpose
1.2 Organization
1.3 RevisionHistory
1.4 Reference
1.5 AcronymList
2Overview
2.1 ApplicationDescription
2.2 Technical Specifications
2.2.1General Specification
2.2.2Receive Specification
2.2.3Transmit Specification
2.2.4Standards
2.3 Interface Diagram
2.4 GeneralFeatures
3PIN Description
3.1 I/ODescriptionParameters
3.2 PIN Namesand Pinouts
3.2.160-PINConnector
3.3 60-Pin Connector Pinout (Top view)
4Interface Descriptions
4.1 Overview
4.2 CODEC Interface

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4.3 UART Interface
4.3.1 Primary UART Interface
4.3.2Secondary UARTInterface
4.4 GeneralPurpose Interface
4.5 External HardwareReset
4.6 LEDs
4.7 User Interface
4.7.1Key Pad
4.7.2LCD
4.7.3 Ringer
5Electrical Specifications
5.1 DC Electrical Specifications
5.1.1Absolute MaximumRatings
5.1.2Recommended Operating Conditions
5.1.3Power Consumption
5.1.4SerialInterfaceElectrical Specifications
5.2 Timing Characteristics
5.2.1External CODECTiming
5.2.2LCDTiming
6Mechanical Dimension
6.1 DT2000-DualOutline
6.2 60-Pin Connector
6.3 RF Connector

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Figures
Figure 2-1 Interface BlockDiagram ....................................................................................... 11
Figure 2-2 General Features ................................................................................................... 12
Figure 4-1 Interface BlockDiagram ....................................................................................... 16
Figure 4-2 Keypad Matrix ...................................................................................................... 21
Figure 4-3 LCD Interface BlockDiagram .............................................................................. 22
Figure 4-4 Reference ExternalRinger DriverCircuit ............................................................. 23
Figure 5-1 External PCM CODECtoModule timing ............................................................ 25
Figure 5-2 Module toExternal PCM CODECtiming ............................................................ 25
Figure 5-3 LCD Timing .......................................................................................................... 26
Figure 6-1 60-pin Female Connector ––––––––––––––––––––––... 29
Figure 6-2 PCB Connector.––––––––––––––––––––––––––..30
Figure 6-3 PCB Connector Layout .–––––––––––––––––––––––. 30
Figure 6-4 Mechanical Characteristics of Cable Harness Assembly.–––––––––.–. 31

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Tables
Table 1-1Revision History ....................................................................................................... 7
Table 3-160-PIN Connector Pinouts ...................................................................................... 15
Table 4-1AnalogAudioPinouts ............................................................................................ 17
Table 4-2Digital CODEC Pinouts ......................................................................................... 18
Table 4-3UART Interface Pinouts ......................................................................................... 18
Table 4-4SecondaryUART Interface Pinouts ––––––––––––––––––– 19
Table 4-5General Purpose Interface Pinouts ......................................................................... 19
Table 4-6LED Pinouts –––––––––––––––––––––––––––– 20
Table 4-7LCD Interface Signals ............................................................................................ 22
Table 5-1Absolute Maximum Ratings ................................................................................... 24
Table 5-2External PCMCODEC Parameters ........................................................................ 26
Table 5-3LCD TimingParameters .......................................................................................... 27

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1. Introduction
1.1 Purpose
This Manual provides hardwareinterface andprogramminginformationforthe DT2000-Dual
CDMA Wireless Data Module.
1.2 Organization
This Manual will discuss the interface and operation of the module and is divided intothefollowing
subsections:
n Section 2 ºIntroduces users tothe DT2000-Dual CDMAWireless Data Module s basic features
andgeneral specifications.
n Section3 ºListseachDT2000-Dual pin andits functionwithinthe device. The pinout forthe
module is listedinnumeric sequence.
n Section4 ºSpecifies the recommendedoperatingconditions, DC voltagecharacteristics, I/O
timing, and power estimations forthe module. Timingdiagrams are alsoincluded.
n Section 5 ºDetails each subsystem orblock withinthemodule andshows how the subsystem
or block interfaces with external peripherals.
n Section 6 ºProvides package dimensions forthe module.
1.3 RevisionHistory
The revision historyfor this document is shownin Table 1-1.
Table 1-1 Revision History
Version Date Description
V1_X1 April 2001 Initial Release ºapplicable DTS andDTSS series software
V1_X2 June 2001 Correcteddocument format
V1_X3 Oct. 2002 Correcteddocument content

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1.4 References
1. QUALCOMM Incorporated. MSM5100Mobile Station Modem:ComponentSupply
Specification.80-V2180-7-X1, July13, 2001.
2. QUALCOMM Incorporated.MSM5100Mobile Station Modem: Device Specification
(PreliminaryInformation). 93-V2180-1-X3, August 30, 2001.
3. QUALCOMM Incorporated. SURF5100User Manual. 80-V2535-1-X1, March28, 2001.
1.5AcronymList
Term Definition
CDMA Code-Division MultipleAccess
CODEC Coder-Decoder
GPIO General-purposeInput/Output
JTAG Joint Test Action Group(ANSI/ICEEEStd. 1149.1-1990)
LCD Liquid CrystalDisplay
LDO Voltage Regulator
LED Light EmittingDiode
PCB Printed CircuitBoard
PCM PulseCoded Modulation
PCS PersonalCommunications Service
RF RadioFrequency
Rx Receive
TCXO Temperature-Controlled CrystalOscillator
Tx Transmit
UART Universal Asynchronous Receiver Transmitter

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2. Overview
2.1Application Descriptions
The CDMA Wireless Data Module is acomplexconsumer communications instrument that relies
heavilyonbothdigital signal and embedded processortechnologies. TheWirelessData Modules
manufacturedbyAnyDATA.NET support Code-Division Multiple Access (CDMA). This operates in
both the cellular and PCS spectrum.
Inacontinuing effort tosimplifythe designandtoreduce theproductioncost oftheWireless Data
Module, AnyDATA.NEThas successfullydevelopedthe DT2000series. The DT2000-Dualis
AnyDATA.NET slatest compact Wireless Data Module operatingin the CellularandPCS spectrum. The
DT2000-Dual alsocontains a complete digital modulationand demodulation system forCDMA standards
as specifiedin IS-95 A/Band IS-2000.
The subsystemintheDT2000-Dual includesaCDMA processor(MSM5100),an integrated
CODEC withanearpiece and microphoneamplifiers, andan RS-232serial interface supportingforward
link data communications at a rate of 230.4kbps.
The DT2000-Dual provides an external interface that includes the standardRS-232,Digital Audio,
External reset control, LCD Display, Keypad, andRingerextension ports.
The DT2000-Dual hasthecapabilityto powerdown unusedcircuits inorder todynamically
minimize power consumption.

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2.2Technical Specifications
2.2.1 General Specifications
Parameters Descriptions
ExternalAccess Code-Division-Multiple-Access (CDMA)
CDMAProtocol IS-95 A/B, IS-98A, IS-126, IS-637A, IS-707A, IS-2000
Data Rate 153.6Kbps max
Transmit/Receive FrequencyInterval 45MHz for Cellularand 80MHz for PCS
Number ofChannel 832 for Cellularand 42for PCS
OperatingVoltage DC +3.4V ~ +4.2V
Current Consumption Stand bymode: Idle (110mA),Sleep (2mA)
Busymode: 900mA(Max)
OperatingTemperature -30”C ~ +60”C
FrequencyStability 300Hz for Cellularand 150HzforPCS
Antenna MCAConnector, 50ohm
Size 39 X 49 X 6.0mmwith case
Weight About20g
ExternalInterface RS-232, Digital/Analog Audio, LCD, Keypad, Ringer
External Reset Control
2.2.2 Receive Specifications
Parameters Descriptions
FrequencyRange 869.04~ 893.97MHz for Cellular and 1931.25~ 1988.75MHz for PCS
Sensitivity Below º104 dBm
InterferenceRejection Singletone(-30dBm @900KHz): Below º101dBm
Twotone(-43 dBm @900KHz and 1700KHz): Below º101dBm
Twotone(-32 dBm @900KHz and 1700KHz): Below º90dBm
Twotone(-21 dBm @900KHz and 1700KHz): Below º79dBm
Spurious WaveSuppression Below º80dBc
Input DynamicRange -25 dBm ~-104dBm
2.2.3 Transmit Specifications
Parameters Descriptions
FrequencyRange 824.04~ 848.97MHz for Cellular and 1851.25~ 1908.75MHz for PCS
NominalPower 0.32 W(24.7dBm)
MinimumControlled Output Power Below º50dBm
Max Power Spurious 900KHz:Below º42dBc/30KHz
1.98MHz:Below º54dBc/30KHz

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2.2.4 Standards
IS-95A/B: Protocol BetweenMS & BTS
IS-96A: Voice Signal Coding
IS-98A: Base MS Function
IS-126: Voice Loop-Back
IS-637: Short Message Service
IS-707: Data Service
2.3 Interface Diagram
Figure 2-1Interface Block Diagram

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2.4 GeneralFeatures
Figure 2-2General Features

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3. PIN Description
3.1 I/ODescriptionParameters
Symbol Description
I CMOS Input
O Output
B Bi-directional
N Voltage or Current Level
IS Input withSchmittTrigger
BS Bi-directionalSchmittTrigger
PU InternalPull-Up
PD InternalPull-Down
KP InternalWeak Keeper Device(Keepers cannot drive externalbuses.)
3.2 PIN Names and Pinouts
3.2.1 60-Pin Connector
PIN NAME TYPE DESCRIPTION
1 MSM_DP_DCD/ (GPIO_INT16) BS-PD Data carrierdetect
2 MSM_DP_RI/ (GPIO_INT25) BS-PD Ringindicator
3 MSM_DP_RFR/ O Ready for receive
4 MSM_DP_TXD O Transmitdata
5 MSM_DP_DTR/(GPIO_INT2) BS-PU Data terminalready
6 MSM_DP_RXD IS-PD Receive data
7 MSM_DP_CTS/ IS-PD Clear tosend
8 GND GND Signalground
9 AUX_PCM_DIN IS-PD ExternalCODEC PCM data input, RXD *
10 GND GND Signalground *
11 AUX_PCM_DOUT BS_PU ExternalCODEC PCM data output, TXD *
12 GPIO_INT22 (PRE_DIAL) BS_PU Generalpurposeinput output
13 AUX_PCM_CLK BS_PD ExternalCODEC PCM clock
14 AUX_PCM_SYNC BS_PD ExternalCODEC PCM sync.
15 GPIO_INT23 (SMS_LED) BS_PU Generalpurposeinput output
16 GPIO_INT03 (IDLE_LED) BS_PU Generalpurposeinput output
17 GPIO_INT04 (BUSY_LED) BS_PU Generalpurposeinput output
18 EXT_RESET I ExternalHardware Reset
19 GPIO_INT09 (HOST_RESET) BS_PD Generalpurposeinput output
20 GPIO_INT12 BS_PU Generalpurposeinput output
21 GPIO_INT13 BS_PD Generalpurposeinput output
22 GPIO_INT17 (PS_HOLD) BS_PD Generalpurposeinput output
23 RINGER O Ringeroutput
24 D00 B-KP Data line
25 D01 B-KP Data line

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PIN NAME TYPE DESCRIPTION
26 D02 B-KP Data line
27 D03 B-KP Data line
28 D04 B-KP Data line
29 D05 B-KP Data line
30 D06 B-KP Data line
31 D07 B-KP Data line
32 A01 B Address line
33 RES_OUT/ B Reset output
34 LCD_CS/ (GPIO_INT40) BS-PU LCD chipselect
35 RD/ B Read enable output
36 LWR/ BS-PU Writeenable output
37 BATT+ I BatteryMonitoring **
38 GND GND Signalground
39 VEXT_DC I Externalpower input
40 VEXT_DC I Externalpower input
41 MIC1P I BalancedAnalogAudioInput (MIC)
(Speaker)
42 MIC1N I BalancedAnalogAudioInput (MIC)
(Speaker)
43 EAR1P O BalancedAnalog AudioOutput(Speaker)
44 EAR1N O BalancedAnalog AudioOutput(Speaker)
45 GPIO_INT33 (KEYPAD_15) BS_PU Generalpurposeinput output
46 GPIO_INT35 (KEYPAD_11) BS_PU Generalpurposeinput output
47 GPIO_INT14 (MOTOR) BS_PD Generalpurposeinput output
48 GPIO_INT36 (KEYPAD_9) BS_PU Generalpurposeinput output
49 GPIO_INT34 (KEYPAD_13) BS_PU Generalpurposeinput output
50 KEYSENSE4/ (ON_SW) IS_PU Key senseinput
51 KEYSENSE1/ IS_PU Key senseinput
52 KEYSENSE2/ IS_PU Key senseinput
53 KEYSENSE3/ IS_PU Key senseinput
54 KEYSENSE0/ IS_PU Key senseinput
55 LCD_E (GPIO_INT41) BS-PD LCD readenable
56 A00 B Address line
57 EAR_DET1 I Ear Kit Detect (small headset)
58 MIC2(MIC) I Analog Audio Input (MIC) (smallheadset)
59 GND (GND_A) GND Signalground (smallheadset)
60 EAR_JACK+ (EAR) O AnalogAudioOutput(Speaker) (small
headset)
Notes:
*Ifnot used as PCM, it can be usedasasecondaryUARTfordebugging.Westronglyrecommend that
the userhas a3-pinconnectoror3 test points on their board,sothat one can easilymonitor and diagnose
their module.
** If the userwants the module tomonitor batteryvoltage andthe userisusing aregulatorin conjunction
with abattery,whose maximum voltageexceeds 4.3V,todrivethe module, then theuser should please
contact our engineers.
Whenusingabatteryinwhichthevoltage isbetween 3.3 Vto4.3Vandregulators aren tusedto drive
the module, leave this pinopen.

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3.3 60-PIN Connect Pinouts (Topview)
Table 3-160-PIN Connector Pinouts
1MSM_DP_DCD/ 2MSM_DP_RI/
3MSM_DP_RFR/ 4MSM_DP_TXD
5MSM_DP_DTR/ 6MSM_DP_RXD
7MSM_DP_CTS/ 8GND
9AUX_PCM_DIN 10 GND
11AUX_PCM_DOUT 12 GPIO_INT22
13 AUX_PCM_CLK 14 AUX_PCM_SYNC
15 GPIO_INT23 16 GPIO_INT03
17 GPIO_INT04 18 EXT_RESET
19 GPIO_INT09 20 GPIO_INT12
21 GPIO_INT13 22 GPIO_INT17
23 RINGER 24 D00
25 D01 26 D02
27 D03 28 D04
29 D05 30 D06
31 D07 32 A01
33 RES_OUT/ 34 LCD_CS/
35 RD/ 36 LWR/
37 BATT+ 38 GND
39 VEXT_DC 40 VEXT_DC
41 MIC1P 42 MIC1N
43 EAR1P 44 EAR1N
45 GPIO_INT33 46 GPIO_INT35
47 GPIO_INT14 48 GPIO_INT36
49 GPIO_INT34 50 KEYSENSE4/
51 KEYSENSE1/ 52 KEYSENSE2/
53 KEYSENSE3/ 54 KEYSENSE0/
55 LCD_E 56 A00
57 EAR_DET1 58 MIC2
59 GND 60 EAR_JACK+

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4. Interface Descriptions
4.1 Overview
This chapter covers informationrequiredto convert the DT2000-Dual intoasubscriber unit
application.In addition,someoftheinternal blocks ofthedevice are described. Understandingthese
internal blocks is necessaryfor one tocompletelygrasp the functions ofthe various interfaces.
This chapter discusses theinterface tothemajorblocksof the DT2000-Dual as shown inthe
followingfigure. These blocks include:
n CODEC Interface
n UARTInterface
n General Purpose Interface
n User Interface
n JTAG Interface
Figure 4-1Interface BlockDiagram

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4.2 CODEC Interface
The CODEC Interface is configuredbyinternal andexternal figures. If the internal CODEC
interface is used, additionalglue logic is not necessaryand themodule sverysimpleaudiointerface can
be used. Otherwise if the internal CODECinterface is notused,anexternal CODECis necessaryto
support the car-kit system. In this case, the module provides a PCM CODEC Interface.
4.2.1 Internal CODEC Interface
The module contains analogaudio interface circuitry.The containedaudio interface supports all of the
required conversation andamplification stages for the audiofront end.
Theaudio interface includes theamplification stagesforboth the microphone andearphone. The
interface supports one single-ended microphone input and one single-ended earphone output.
Table 4-1AnalogAudioPinouts
NAME DESCRIPTION CHARACTERISTIC
MIC2 MIC Input Analog Input(PinNo. 58) *
EAR_DET1 EAR/MIC Set Detect Logic Input (Pin No. 57) **
EAR_JACK+ EarphoneOutput Analog Output (Pin No. 60)
GND_A AudioGround AudioGround (Pin No. 59)
Note:
*MIC2,along with being amicrophone input, checks to see if theuserhas pressedthe headset key,
whichallows the usertoconnect toor disconnect fromacall. This pinisinternallypulled highand is
thereforenormallyinthe high state. Toactivate this inputandconnect toor disconnect from acall, the
user must set the MIC2pin toa low state for 100ms to200ms.
** EAR_DET1checks tosee if aheadset hasbeen connected tothe ear-jack. When thereis noheadset
connectedtothe ear-jack, theaudiopathis disconnected. Whenaheadset is connectedtothe ear-jackan
audiopathis opened. Tosimulate aheadset connectedto theear-jack,the usermust applyalowsignalto
the EAR_DET1 pinfor as long as the user wants the audiopathtobe kept open.

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4.2.2 Extended CODEC Interface
The PCMCODEC interface is used forthe car-kit audiosystem. This interface is optional.
External CODEC interface signals are listed below:
Table 4-2 Digital CODEC Pinouts
NAME DESCRIPTION PINOUTS
AUX_PCM_CLK PCM Clock Pin No. 13
AUX_PCM_DIN PCM DataInput Pin No. 9
AUX_PCM_DOUT PCM DataOutput Pin No. 11
AUX_PCM_SYNC PCM Sync. Pin No. 14
4.3 UARTInterface
4.3.1 PrimaryUART interface
TheUniversalAsynchronousReceiver Transmitter (UART) communicates withserial data that
conforms to the RS-232 Interface protocol. Themodule provides 3.0VCMOS level outputs and 3.0V
CMOS switchinginputlevels. Inaddition, all inputs have a 5.0Vtolerance, however 3.0Vor3.3VCMOS
logic compatible signals are highlyrecommended.
All the controlsignals oftheRS-232are activelow,however the data signals, RXD andTXD, are
active high.
TheUARThasa64 bytetransmit (TX) FIFO anda64 bytereceive(RX) FIFO. TheUARTfeatures
hardware handshaking,programmable data sizes, programmable stopbits, and odd, even,noparity.The
UARToperates at a maximum bit rate of 115.2kbps.
Table 4-3 UARTInterface Pinouts
NAME DESCRIPTION CHARACTERISTIC
DP_DCD/ Data Carrier Detect Network connected from the module
DP_RI/ RingIndicator Output to host indicating coming call
DP_RFR/ Readyfor Receive Readyfor receivefrom host
DP_TXD Transmit Data Output data from themodule
DP_DTR/ Data TerminalReady Host readysignal
DP_RXD Receive Data Input data tothemodule
DP_CTS/ CleartoSend Clear tosend to thehost
GND SignalGround Signalground
Reference Plane: DT2000 Dual

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4.3.2 SecondaryUARTinterface
The secondaryUART is used tomonitoranddiagnose the status of the DT2000-Dual. It is strongly
recommendedfor the usertohave the followingsecondaryUARTpins connected toan extra connector or
totest points, in order toeasilytroubleshoot anyproblems with the module.
Table 4-4 Secondary UARTInterface Pinouts
NAME DESCRIPTION CHARACTERISTIC
AUX_PCM_DIN/ Data Input Input data to themodule
AUX_PCM_DOUT/ Data Output Output data from the module
GND SignalGround Signalground
Reference Plane: DT2000 Dual
4.4 GeneralPurpose Interface
The general purpose interface consists of 13user-definable bi-directional pins.
Each GPIOpincanbeconfigured asaninputinterruptsource. Inaddition,some GPIO pinscanbe
usedas output control pins from the module. The usercan define these pins properlyas follows.
Table 4-5 General Purpose Interface Pinouts
NAME TYPE CHARACTERISTIC
GPIO_INT03 BS_PU Configured as a pull-up, Bi-directional
GPIO_INT04 BS_PU Configured as a pull-up, Bi-directional
GPIO_INT09 BS_PD Configured as a pull-down, Bi-directional
GPIO_INT12 BS_PU Configured as a pull-up, Bi-directional
GPIO_INT13 BS_PD Configured as a pull-down, Bi-directional
GPIO_INT14 BS_PD Configured as a pull-down, Bi-directional
GPIO_INT17 BS_PD Configured as a pull-down, Bi-directional
GPIO_INT22 BS_PU Configured as a pull-up, Bi-directional
GPIO_INT23 BS_PU Configured as a pull-up, Bi-directional
GPIO_INT33 BS_PU Configured as a pull-down, Bi-directional
GPIO_INT34 BS_PU Configured as a pull-down, Bi-directional
GPIO_INT35 BS_PU Configured as a pull-down, Bi-directional
GPIO_INT36 BS_PU Configured as a pull-down, Bi-directional
4.5 External Hardware Reset
There aretwotypes ofresets that theuser can employtorestart themodule. Thefirst typewill reset
the MSM andthememoryand is performedwhen theusergives the ATcommand,AT+RESET,to the
MSM.Anotherwaytoreset themodule isbyusing theexternal hardware reset. This type ofreset will
reset the hardwareas well as theMSM andthe memory.Theflash memorywillbethe onlyinformation
that is kept. Toperformanexternal hardware reset, makesure the module has powered onandis not in

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the initializationstage, and thenapplyahighsignalof2.5Vto3.7 Vtothe externalhardware resetpin
for200ms to500ms. Keepthe external hardware reset pin lowwhenthe module is initializingaswell as
duringnormal operation.
4.6 LEDs
TheDT2000-Dual canindicate its current statusthrough three pins. These three pinscanbe
connectedtoLEDs tomorequicklyandeasilydetermine the status ofthemodule. The SMS LED
indicates tothe user ifthere is aSMSmessageoravoicemail message. Ifthere is aSMS message ora
voicemail message, the SMS LED will turnon. After the user has readthe SMS message or listenedtothe
voicemail message, theSMSLED turnsoff. Shortlyafterthemodule has been turnedon, the Idle LED
shouldturn onindicating that the module is in-service. This means thatthemodule is within therange of
the base stationandis able toreceiveasignal fromthe base station. When the moduleis in traffic or
conversation stage, the BusyLED is on.
Table 4-6 LED Pinouts
NAME DESCRIPTION PINOUTS
GPIO_INT23 SMS_LED Pin No. 15
GPIO_INT03 IDLE_LED Pin No. 16
GPIO_INT04 BUSY_LED Pin No. 17