EFJohnson 7780 service manual Microprocessor IC306 Pin Descriptions

Page 70

CIRCUIT DESCRIPTION

Table 4-1 Microprocessor IC306 Pin Descriptions

Pin

Port Name

Input or

Description

Active High

Name

Output

or Low

 

 

 

 

 

 

 

1

RES

Input

Reset pulse input

-

2

XTAL

Input

System clock connection terminal

-

 

 

 

 

 

3

EXTAL

Input

System clock connection terminal

-

 

 

 

 

 

4

FWE

Input

Not used

-

 

 

 

 

 

5

MDI

Input

Flash ROM data import control (L=load)

Low

 

 

 

 

 

6

MDO

-

Not used

-

 

 

 

 

 

7

NMI

-

Not used (external pull-up)

-

 

 

 

 

 

8

STBY

-

Not used

-

 

 

 

 

 

9

VCC

-

Supply voltage

-

 

 

 

 

 

10

CSHIFT

Output

Clock shift control (H=shift)

High

 

 

 

 

 

11

-

-

Not used

-

 

 

 

 

 

12

INTS

I/O

-

-

 

 

 

 

 

13

RxD

-

Not used (external pull-up)

-

 

 

 

 

 

14

TxD

-

Not used (external pull-up)

-

 

 

 

 

 

15

VSS

-

Ground

-

 

 

 

 

 

16

DTMFSO

Output

Segment data for LCD driver

-

 

 

 

 

 

17

EXTDC

Input

Option signal input

-

 

 

 

 

 

18

DTMFCK

Output

Clock signal for LDC driver

-

 

 

 

 

 

19

-

-

-

-

 

 

 

 

 

20

FCN

Input

FCN button switch

Low

 

 

 

 

 

21

AUX

Input

AUX button switch

Low

 

 

 

 

 

22

DPOTST

Output

Digi-pot strobe signal

-

 

 

 

 

 

23

OFFREQI

Input

Main voltage supply switch

Low

 

 

 

 

 

24

QSELOI

Input

Channel select switch input

-

 

 

 

 

 

25

-

-

-

-

 

 

 

 

 

26

SN_RX

Input

SMARTNET receive data input

-

 

 

 

 

 

27

TXDATA

Output

Subaudible tone/main audio signal out

-

 

 

 

 

 

28

RXDATA

Input

Receive data input

-

 

 

 

 

 

29

BWC

Output

Transmit/receive data filter bandwidth signal output

High

 

 

 

 

 

30

KEYR3

Input

Key matrix scan in

-

 

 

 

 

 

31

KeyR2

Input

Key matrix scan in

-

 

 

 

 

 

32

NOISE

Input

Noise pulse input/squelch control

-

 

 

 

 

 

33

MMUTE

Output

Mutes microphone audio signal (L=mute)

Low

 

 

 

 

 

34

TXPREC

Output

Subaudible signaling tone/damp signal output

-

 

 

 

 

 

35

TEST

Output

Bypass transmit data filter (H=Normal/no bypass)

High

 

 

 

 

 

36

L5V

-

Supply voltage

-

 

 

 

 

 

37

L5V

-

Supply voltage

-

 

 

 

 

 

38

BATIN

Input

Low battery voltage detection

-

 

 

 

 

 

39

RSSI

Input

RSSI (Receive Signal Strength Indicator)

-

 

 

 

 

 

40

-

-

-

-

 

 

 

 

 

41

-

-

-

-

 

 

 

 

 

42

-

-

-

-

 

 

 

 

 

43

-

-

-

-

 

 

 

 

 

44

-

-

-

-

 

 

 

 

 

45

-

-

-

-

 

 

 

 

 

46

VSS

-

Ground

-

 

 

 

 

 

November 1999

 

Part No. 001-7780-500

4-6

Page 69 Page 71
Image 70
Page 69 Page 71
Contents 7780 Page Page Table of Contents Table of Contents CONT’D List of Tables List of FiguresGeneral Information Scope of Manual Equipment DescriptionPart Number Breakdown AccessoriesFactory Customer Service Transceiver IdentificationToll-Free 800 AccessoriesAccessory Factory ReturnsInternet Home Intrinsically Safe Information Replacement PartsDefinitions Intrinsically Safe and Nonincendive Ratings Temperature Code T3CPossible Ignition Sources Classification of Hazardous Areas and AtmospheresTypical Hazard Group Class Accessing PC BoardsMaterial Classification Area ClassificationRemoving RF Unit Removing Logic UnitSpecifications GeneralTransceiver Operation FeaturesControls and Display TX Indicator Red Indicates when the transmitter is keyed Low-Battery Indicator AmberFront Panel Keys Full Keypad Model DisplayDisplay General Operation Turning Power on and Setting VolumeOption Switches BacklightFunction Conv Option Switch FunctionsSee Tone ENABLE/DISABLE ScanningConventional and SMARTNET/ Smartzone Operation Display Mode Selection Conventional FeaturesMonitoring Before Transmitting Busy Channel Lockout Monitor ModeCall Guard Squelch Power Output Select Penalty TimerConversation Timer Conventional Mode ScanningPriority Channel Sampling DTMF/ANI Signaling Standard Conventional CallsStandard Group Calls SMARTNET/SMARTZONE FeaturesViewing Unit ID Enhanced Private Conversation CallsTransceiver Operation Private Conversation II Calls Telephone Calls Call Alert Messaging Emergency Alarm and CallSending Status Conditions SMARTNET/SMARTZONE Scanning Failsoft OperationDynamic Regrouping Supervisory Tones Menu Description Keypad ProgrammingZone Change Parameter System Parameters Channel Change ParameterChannel Parameters Transceiver Programming Programming SetupPctrunk Software Installation Computer DescriptionProgramming File Types Connecting RPI to Computer and TransceiverStarting and Exiting Help FilesFile Size Indication Screen Pop-Up Buttons and File Size IndicatorProgramming Procedure Creating and Displaying SystemsMenu Commands Menu BarSystems Menu Radio Type MenuDownload Menu Upload Menu Window MenuBand DefaultsRADIO-WIDE Parameter Screens ZonesModify List Screen Radio Wide Scan ListRadio-Wide Scan List Screen Assign Function ButtonsFull Spectrum CC Scan RADIO-WIDE Conventional ScreenRADIO-WIDE SMARTNET/SMARTZONE Screen Hot DtmfProgramming Conventional Systems and Channels Adjustable ParametersRADIO-WIDE Portable Options Screen Conventional System General ScreenKeypad Editing TimersConventional System Modify Scan List Screen Scan List ButtonSetting UP Conventional Channels Scan TimersPriority Channel Selection Conventional Channel Screen Parameters Selected ChannelChannel Type Transmit PowerSignaling Tx Time-OutISW Delay Time Restricted AccessTime-Out Timer Splinter ChannelsPhone Interconnect SMARTNET/SMARTZONE System Other ID’S ScreenSMARTNET/SMARTZONE System Phone Interconnect Screen Private CallSMARTNET/SMARTZONE System Talk Groups Screen SMARTNET/SMARTZONE System Emergency Settings ScreenEmergency Alarm Failsoft ChannelTrunking Phone List Screen SMARTNET/SMARTZONE System Lists ScreensMessage Aliasing Screen Announcement Groups Screen Control Channels ScreenTrunking Call List Screen Status Aliasing Screen Setting UP SMARTNET/SMART- Zone ChannelsSMARTNET/SMARTZONE Channel Screen Parameters SMARTNET/SmartZone Channel Screen Other Screen ParametersCall Guard CTCSS/DCS Codes and Tones Recommended Tone Call Guard Codes FreqMHz Channels MHz Channels MHz Channels MHz Channels MHz Channels MHz Channels Circuit Description Power Switching and RegulationPower Switching Synthesizer DescriptionSynthesizer Chip IC1 VCO and Tcxo ModulationCharge Pump Q1, Q2, Loop Filter RF Amplifier Q1, First Mixer Q2 Receiver Circuit DescriptionIf Amplifier Q2, LIMITER/DETECTOR IC3 Transmitter Description Antenna Switch and LOW-PASS FilterSquelch Circuit IC4A/B, IC5A Amplifier Q9, Driver Q8Control Logic and Display Receive Audio ProcessingMicroprocessor IC306 Pin Descriptions Pin Port Name Input or Description Active High OutputHvfulswlrq Receive and Transmit Data Processing Audio Amplifier IC104-IC106Receive Data FILTER/DETECTOR IC102A/B, IC107A/B Transmit Data Filter IC206B/ IC206A Transmit Audio ProcessingLOW-PASS Filter IC205A/B Smartnet Data ProcessingPower Setting Operating Time Battery Pack and Charger InformationBattery Pack Function Fahrenheit CelsiusBattery Pack and Charger Information Alignment Procedure and Performance Tests Test SetupTune Software Hqhudo Mm/3/32 Mm/1/8 Phone JackPreliminary Setup Main Pctune ScreenHigh Power Level = 3.0 watts Low Power Level = 1.0 watt Transmit Frequency and PowerTransmit Power Adjustment Screen Modulation BalanceAudio Deviation Squelch AdjustRssi Adjust Data DeviationPerformance Tests Receiver Performance TestsTransmit Frequency Power OutputTransmitter Performance Tests Transmit ModulationThis page intentionally left blank Chassis Parts Parts ListDisplay Assembly Ref No DescriptionKEY Assembly Display AssemblyKEY Assembly If AssemblyIf Assembly PLL Assembly RF UnitRF Unit NJM2904V-TE1 IC RF Unit Logic Unit Logic Unit TDA7233D IC Logic Unit 200K ERJ3GE MP35 MP18 MP25 KEY Front Panel EP2EP1 MP32 MP33 MP27 MP34 MP28 MP29 MP23 MP22 MP30 MP24 MP26 MP18 PLL Board TOP View Schematic Diagrams and Component LayoutsPLL Board Bottom View If Board TOP View If Board Bottom ViewTransceiver Block Diagram RF UnitRF Board TOP View MICRF Board Schematic If AMPLogic Board TOP View HD1Logic Board Schematic Receive Audio ProcessingDisplay Board Bottom View GND KEYR3 KEYR2 KEYR1 KEYR0 KEYS3 KEYS2 KEYS1 KEYS0 GNDDisplay Board Schematic DS3 DS4 DS5KEY Board Front View KEY Board Back ViewKEY Board Schematic S S R R R RScan HC2 HC7 HC8 HC3 Schematic Diagrams and Component Layouts
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