NON-VOLATILE MEMORY PROGRAM WORDS TUNING VOLTAGE BITS BAND BITS MULTI

The Datasheet Archive - 100 Million Datasheets from 7500 Manufacturers.

NON-VOLATILE MEMORY PROGRAM WORDS TUNING VOLTAGE BITS BAND BITS MULTI

Datasheet Thumbnail

Top Searches for this datasheet

SINGLE-CHIP VOLTAGE TUNING SYSTEM WITH ANALOG CONTROLS INTERFACE
NON-VOLATILE MEMORY PROGRAM WORDS TUNING VOLTAGE BITS BAND BITS MULTI STANDARD BITS PROGRAM SKIP 10,000 MODIFY CYCLES WORD MIN. YEARS DATA RETENTION VOLTAGE SYNTHESIZER (BRM PWM) MEMORY ANALOG CONTROLS BAND SWITCH OUTPUTS (VHF III, UHF, CATV) KEYBOARD AUDIO VISUAL OUTPUTS (VCR CODED MULTI STANDARD OUTPUTS (e.g. PAL, SECAM, NTSC etc.) DIRECT 11/2 DIGIT SEGMENT COMMON ANODE DISPLAY DRIVING REMOTE CONTROL RECEIVER (M708 transmitter) 5-BIT DATA INPUT CONTROL LINE INTERFACE LINEAR DEFEAT OUTPUT FLYBACK/SYNC. COINCIDENCE INPUT SEMI-AUTOMATIC SEARCH STANDBY OUTPUT OPTION SELECT PROGRAMS POWER MODE PROGRAM SKIP DEFEAT OPTIONS DECADE MODE OPTION PROGRAM OPTION TEMPORARY ANALOG UP/DOWN INDICATOR DISPLAY BAND SKIP OPTION 510kHz CHEAP CERAMIC RESONATOR
pable including floating gate memory cell (EEPROM). i.c. been designed complete digital tuning system based voltage synthesis principle replacement conventional potentiometers band switches particularly cost sets. also provides some functions normally only associated with higher cost sets. memory integrated chip together with necessary control circuitry providethe program memory. Separate memory also integrated provide memory four analog controls. seven segment display directly driven chip display program selected, direction movement analog controls. Provision made remote control receiver both chip, latter interfaced data input single control line. (This enables control microprocessor). local keyboard used with device variety configurations. option select provides different program number options, power options skip associated functions. This device another significant step towards complete integration control circuitry. device packaged plastic package.
DIP40 (Plastic Package) ORDER CODE M494B1
DESCRIPTION M494 monolithic integrated circuit fabricated SGS-THOMSON's EPM2 process N-channel, Planox, double poly process caJune 1991 1/22
CONNECTIONS
OPTION SELECT DISPLAY DRIVE MEMORY TIMING DATA HANDSHAKE STANDBY DEFEAT FB/SYNC COINCIDENCE REMOTE CONTROL VOLUME SATURATION TEST BRIGHTNESS CONTRAST TUNING OSC. OSC.
494-01.EPS
CATV
ABSOLUTE MAXIMUM RATINGS
Symbol VO(off) Supply Voltage Memory Supply Voltage Input Voltage State Input Voltage Output Current Driver Outputs other Outputs Total Package Power Dissipation Storage Temperature Operating Temperature Capacitance Option Select Resistance Option Select Capacitance data outputs keyboard inputs when lines connected keyboard switch closure Series Resistance Single Keyboard Switch Capacitance Data Handshake Parameter Value Unit
494-01.TBL
Ptot Tstg Crts
Max. Delay between Memory Timing Memory Supply Pulses
Stresses above those under "Absolute Maximum Ratings" causes permanent damage device. This stress rating only functional operation device these other conditions above those indicated operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
2/22
STATIC ELECTRICAL CHARACTERISTICS (Tamb 70°C, unless otherwise specified)
Pins Memory Supply Symbol Parameter Memory Supply Current Test Conditions Write Peak Write Average Erase Peak Erase Average Read Peak Read Average 4.75V, 2.5mA 4.75V, 4.75V, 5.25V 5.25V, 0.8V Pull 4.75V, 5.25V, 13.2V 5.25V, 1.5V Pull 4.75V, 30mA 5.25V, 1.5V 4.75V, VO(off) 5.5V Pull 4.75V, 5.25V, 13.2V 5.25V, 1.5V Pull 4.75V, 100µA 4.75V, 0.7V 5.25V, 1.5V Pull 4.75V, 15mA 4.75V, 5.25V, 13.2V 4.75V, 4.75V, 150µA 5.25V, 13.2V 4.75V, 4.75V, 150µA 5.25V, 1.5V Pull 5.25V, 13.2V Min. Typ. Max. 13.2 Unit 3/22
Memory Timing Tuning FB/sync. Coin. Input
Vol. Brigh. Sat. Contr. DACs
MS0, def. AV0, Option Select
Standby
Display Drive UHF, III, CATV
Data Handshake
IO(off) IO(off) IO(off) IO(off) IO(off) IO(off) IO(off)
Pull Down Leakage Supply Current
494-02.TBL
DEFINITION TERMS M494 four conditions states that which defined below. Logic logic Powered Down 25V. Device driving display normally. Data Handshake configured i/p. Standby other functions operating normally. Standby Device driving display show single static segment). Data Handshake configured i/p. Stanby keyboard commands disabled except program command On/Off, On/Stanby. Memory sequence down, (decade) commands. Analog controls. Tuning, defeat o/p's Band o/p's (externally pulled up). Standby section more detail. Device driving display. Data Handshake configured o/p. Standby Display disabled Display drive (externally pulled up). keyboard commands disabled except ON/OFF. Remote data command sources disabled. Analog controls, Tuning, defeat o/p's (externally pulled up).
FUNCTIONAL DESCRIPTION (clock frequency 500kHz) When applied, internal power reset 110ms generated. voltage threshold reset range 3.5V fact point which internal clock phases start. This connected substrate i.c. reference parameters device. Oscillator frequency oscillator should between 510kHz using cheap ceramic resonator. reference frequency remote control transmitter must also same range i.e. oscillator frequency 455kHz then transmitter frequency could 510kHz vice versa. Test This normally used post fabrication testing purposes only should tied VSS. However this used SGS-THOMSON enable external loading memory. Details achieve this furnished SGS-THOMSON. Remote Control Input integrated receiver decodes signals transmitted M708 (address 10). minimum signal amplitude should 0.5V peak peak input pin. minimum pulse width should 8µs.
4/22
signal from preamplifier (TDA8160) brought signal input coupling network (see Figure
(TDA8160) 2.2k 4.7nF 4.7nF
Figure
TDA8160
494-02.EPS 494-03.EPS
input self biased approx. 1.5V. When large signal applied input level shift will take place predominantly coupling network. However another time constant also visible coupling internal resistor (see Figures. Figure
1.5V Remote Control
FUNCTIONAL DESCRIPTION (continued) Figure
1.5V
494-04.EPS
Several tests performed signal Measurement pulse distance (time base synchronization). Check positions relative time base windows. Check parity bit. Check absence pulses between parity stop pulses. Check noise level. receiver checks noise level time after each pulse detected. these tests successful received word stored decoded. rejected. transmission terminated reception transmission (EOT) code internal timer measures transmission interruption more than 550ms. more detail concerning operation receiver refer SGS-THOMSON Technical Note pp11-12. receiver local keyboard have same command source priority i.e. local command accepted until previously accepted command been completely executed code transmitted. Similarly local command under execution then command will accepted. truth table commands shown next page. Analog Control Outputs Four analog control outputs implemented provide Volume, Brightness, Saturation Contrast from four D/A's. These D/A's Pulse Width Modulation technique synthesize pulse train constant frequency variable pulse width (PWM). Each output delivers 7.8kHz square wave whose duty cycle variable steps. External filtering level shifting required realise static voltage from pulse train. analog outputs continuously varied command from keyboard data command sources outputs will change approx. every 112ms (fck 500kHz) approx. every 102ms command issued from command source. analog control specifi-
cally designed volume control mute circuitry built start reset analog control outputs except volume enabled after period approx. seconds. Standby states analog control outputs pulled logic normalise command reads contents each analog memory sequentially corresponding counter output. Tuning Output tuning voltage generated from counter. program memory stores MSB's tuning word. range circuitry least bits tuning counter does affect resolution tuning. contents counter converted using Rate Multiplier (BRM) technique. bits gives 8192 steps which yields resolution approximately 3.9mV with max. tuning voltage 32V. This corresponds resolution about 75kHz band. MSB's tuning word converted using remaining bits using BRM. Thus tuning word increases from zeroes number pulsesin period increases with pulses being same length 2µs). values larger then conversion takes place where number pulses period stays constant width changes. When pulse width reaches 15to successive pulses "link" together number pulses decreases (see Figure pulse train external pass filter realise voltage. temperature dependence this system predominantly switching times output pulses there only maximum pulses period temperature stability very good. Standby states tuning output pulled logic Figure
PULSES
TUNING VOLTAGE
5/22
494-05.EPS
FUNCTIONAL DESCRIPTION (continued) Table Remote Control Commands (address code 1010)
Command Number Function Programs Standby Mute (toggle) Program Program Program Program Contrast Contrast down Program Program Program Program Memory Seq. Memory Seq. down Program Program Program Program Normalise On/stby (tog.) Program Program Program Program Volume Volume down Brightness Brightness down Saturation Saturation down Programs Standby Mute (toggle) Program Program Program Program Contrast Contrast down Program Program Program Program Memory Seq. Memory Seq. down Program Program (decade) (decade) Normalise On/stby (tog.) Volume Volume down Brightness Brightness down Saturation Saturation down Code
above table showns difference between program options with respect remote control commands. Commands change function between options. Commands should used program option, they have function. operation
Program Memory memory (EEPROM) integrated chip provide storage stations. Each memory location bits length providing bits tuning voltage, bits band, bits coded multi-standard outputs program skip flag. Individual program words canbe read command from keyboard, remote data command sources only written command from keyboard. There methods storing program (writing memory) post tuning selection program number. Commands, section Reading each memory location sequence down) also achieved from command sources. memory timing functions provided chip only external transistor required switch external memory supply (25V).
6/22
There essentially operations carried memory Write/Modify Read. Write/Modify cycle consists steps "1s" written bits addressed word. bits word erased. contents written. Using this method bits addressed word aged same. more detail concerningthe write, erase read current waveforms Memory Supply M491 datasheet. Memory Analog Controls memory analog controls electrically identical main program memory organised four 6-bit words located sequentially addressed words memory. Each word corresponds Volume, Brightness, Saturation Contrast outputs. power reset normalise command each memory word read corresponding counter sequence.
FUNCTIONAL DESCRIPTION (continued) Display, Keyboard Data Multiplexing Logic integrated chip provide multiplexing between display, keyboard data inputs. state with Data Handshake logic input display keyboard muxed together. Figure Each column output goes logic sequence inputs scanned closure. chronological order across total mux. period there initialisation, scan, decision display periods. Data Handshake complex logical function. modes operation hand shake line output line signal that M494 state. order achieve this function careful signal timing required both internally externally chip. Figure When device state Data Handshake used signal this condition being pulled Figure Data-input-timing
DATA HANDSHAKE (END TRANSMISSION) DATA HANDSHAKE CONFIGURATION
Figure
PERIOD 2ms) (8ms)
DISPLAY DRIVE INITIALIZE
640µs DECISION DISPLAY
DATA
DATA
DISABLED TILL EXECYTION (EOT TRANSMISSION)
SCALE
Note Oscillator Clock 500kHz
7/22
494-07.EPS 494-03.TBL
Symbol Parameter tRTS Request Send Pulse (RTS) tCTS Clear Send (CTS) tO/P Output Configuration Handshake Time Data Time Data Hold Time Synchronization Jitter next Pulse
Min.
Typ. Max. Unit
494-06.EPS
SCAN
FUNCTIONAL DESCRIPTION (continued) Display M494 capable directly driving digit common anode display max. sink current 15mA segment. capable sinking max. current 30mAso that these segments driven from same same brightness other segments. instruction from internal command decoder display shows programme number, direction analog control movement, decade changeor Memory Addressing function active. Analog controls this context defined Tuning, Volume, Contrast, Saturation Brightness. formats display analog control direction, decade change Memory Addressing shown below respectively
DOWN MEMORY ADDRESSING MEM. ADDR.
main keyboard matrix (a-g D0-D4), logic detects keys closed simultaneously display blanked indicate this condition user command executed. When logic detects only pressed display will re-illuminate command executed. This avoids confusion which command should executed provides feed back user. Option select line options/commands active simultaneously. mode decade mode selected option select line presence diode respectively. These modes only active program option described below mode display will toggle condition shown Display Section. Access programs first decade made simply pressing program access programs second decade, whatever current program made pressing followed program key. decade mode pressing either (decade) keys display will light extinguish half digit respectively simultaneously effect tuning information. e.g. device program pressing (decade) will give program then pressing (decade) will give program Pressing (decade) again will have effect. program option select acts like enable decade modes. i.e. decade modes only selectable program option. program option function key, program (decade) (decade) changed function, programme respectively. i.e. difference between fig. those keys that change function. pressed followed brightness example device will increase brightness only reset command i.e. last command from command source will always executed single keystroke command command will reset possible press keyboard then program command from Data command sources vice versa. Thus there methods selecting program from keyboard program option direct access (only programs) Memory sequence up/down. there methods selecting program from keyboard program option mode, decade mode Memory sequence up/down.
analog controls above condition displayed with "overrun" time 300ms. i.e. display will show "arrows" period 300ms after release analog control down key. Memory Addressing function display flashes after Memory Addressing function commanded continues flash until programme selected other command given. segment only flashes continues flash until programme number selected other command given. Memory Addressing pressed then display above shown with segments only flashing until programme number selected other commands given. When Store Skip Flag commands executed whole display flashed second. Keyboard possible implement keyboard with max. size keys array. Fig. shows arrangement matrix. Each connects (a-g) with column (D0-D4) with max. resistance 10k. De-bounce logic integrated chip that only allows acceptance command closed longer than 40ms except On/Standby On/Off commands where relevant keys must closed approximately 100ms. This equivalent received commands).
8/22
494-08.EPS
FUNCTIONAL DESCRIPTION (continued) Figure Keyboard Programs
NORMALIZE CONTRAST STORE PROGRAM ON/STANDBY CONTRAST (TOGGLE) DOWN STORE ANALOG VALUES VOLUME BRIGHTNESS TUNE
VOLUME DOWN BRIGHTNESS TUNE DOWN DOWN
SKIP FLAG ON/OFF (TOGGLE) BAND SEQUENCE
SATURATION MEMORY SEQUENCE SEQUENCE
MUTE (TOGGLE) SATURATION MEMORY DOWN SEQUENCE DOWN MEMORY ADDRESSING
AV1* P/U* OPTION SELECT
STANDBY
SKIP
DEFAULT POWER
9/22
494-09.EPS
FUNCTIONAL DESCRIPTION (continued) Figure Keyboard Programs
NORMALIZE CONTRAST STORE PROGRAM ON/STANDBY CONTRAST (TOGGLE) DOWN STORE ANALOG VALUES VOLUME BRIGHTNESS TUNE
DECADE VOLUME DOWN BRIGHTNESS TUNE DOWN DOWN
DECADE SKIP FLAG ON/OFF (TOGGLE) BAND SEQUEN
SATURATION MEMORY SEQUENCE SEQUEN
MUTE (TOGGLE) SATURATION MEMORY DOWN SEQUENCE DOWN MEMORY ADDRESS
AV1* P/U* DECADE* MODE OPTION SELECT
STANDBY
1*MODE
SKIP
DEFAULT POWER
10/22
494-10.EPS
FUNCTIONAL DESCRIPTION (continued) Data Input Shown below codes commands Table Data input will accept signals whose timing defined Figure electrical characteristics defined table static electrical characteristics. code must transmitted after each command after min. period 112ms. Band Outputs Four band outputs provided selection signal band III, CATV. Band skip logic implemented that tieing relevant band skipped regions transmission that band. bands seTable Data Commands
Command Number Function Programs Programs Program Program Program Program Program Program Program Program Program Program Program Program Program Program Program Program Program Program Program Program Program (decade) Program (decade) Program Program Program Program Normalise Normalise Volume Volume Volume down Volume down Contrast Contrast Contrast down Contrast down Brightness Brightness Brightness down Brightness down Saturation Saturation Saturation down Saturation down Memory Seq. Memory Seq. Memory Seq. down Memory Seq. down On/standby (toggle) On/standby (toggle) Standby Standby Mute (toggle) Mute (toggle) TRANSMISSION (pulled Code
lected only rolling sequence band sequence keyboard command. sequence follows III, UHF, CATV. Multi Standard Outputs coded multi standard outputs general purpose system flags) provided that designed areas more than transmission standard. This function requires external decoder realise different standards e.g. NTSC, SECAM etc. multi standard sequence command available from keyboard gives simple binary count outputs etc. Standby states multistandard outputs pulled logic
above table shown difference between program options with respect Data input commands. Commands change function between options. Commands should used program option, they have function. operation.
11/22
FUNCTIONAL DESCRIPTION (continued) Audio Visual Outputs audio visual outputs provided automatic selection and/or personal computer. logicstate pins dependson option selected, program option program number selected according truth tables below Table Option (16/20 Programs)
Program 16/0 15/19 Others
device goes into Standby from then program command will bring device with that program selected. On/Off command from keyboard will cute funct On/Standby, Memory sequence down, (decade) commands from command source will bring device program selected before Standby with display showing that program only, i.e. device executes command only. device goes into Standby from Powered down then On/Off command from keyboard only program command, On/Standby, Memory sequence down, (decade) commands from command source will bring device program i.e. device executes command only. Option Select Option select provides extra line that performs "hard wired keyboard function" conjunction with keyboard scanning lines D0-D4. This line integrated logic associated with that enables many functions active simultaneously. contrast, keyboard inputs will allow active given time. keyboard section. Various options selected connection diode shown Figures From left right along Option select line column selects number programs. diode connected here selects programs (full complement) diode (default) selects programs only that accessed. program option only enables selection decade modes column column option defines state outputs protocols. These described section Audio visual output. Column defines state M494 powers connection diode (default) made here device powers state. diode present then device powers Standby state. column activated program option only, presence diode places device mode absence diode selects decade mode. diode switch column defeats skip condition enables program memory words read with skip flag set. This allows programming reprogramming) previously skipped words.
Table Option (16/20 Programs)
Program Others
External pull resistors must used realise logic outputs open drain transistors. Configuration. Defeat Output defeat output compatible signal that capable switching circuitry out. defeat output pulled program change including memory sequence down held 500ms after execution command. When tune down commanded defeat output taken logic After tuning operation defeat held second after released (see Figure power start resets taken logic approx. seconds. Figure
TUNE UP/DO KEYED DEFE OUTPUT
RELEASED
494-11.EPS
Standby standby output push pull output capable directly driving transistor switching relay. states this defined definition terms. When standby commanded, available from command sources Standby On/Standby commands, standby output enabled.
12/22
FUNCTIONAL DESCRIPTION (continued) Skip Function Program skip implemented M494 single memory associated with each program word. acts flag device indicate that program word should skipped next program word read from memory ascending descending order skip flag set. Programs skipped only when accessed using memory sequence up/down commands. Direct access program from keyboard, data command sources will always override skip function. e.g. skip prog. prog. commanded from then prog. will tuned even there prog. stored that memory location. order program skip defeat function when required commands available skip flag skip defeat. skip defeat switch designed activated facia panel under which infrequently used controls. skip flag command M494 stores current contents tuning, band counters sets skip bit. After skip flag operation contents tuning, band counters will change device continues output these values. operation transparent user terms function indicated display program number flashing second. order reset skip program word desired program should selected with skip defeated. station should then tuned, required, then store command issued. store command automatically resets skip flag. skip defeat command enables reading writing (plus resetting skip flag) memory words whose skip flag set. skip defeated device will only access number programs selected option select i.e. programs only selected then skip defeat will enable access programs. Reset There conditions under which M494 reset power start command). Power reset triggered whenever falls below about duration this reset 110ms after been restored. Power Reset (Powered down Standby states) After reset period 110ms program counter program outputs disabled defined Standby states. Standby definitions. option selection, keyboard, momentary switch and, when standby, display, data inputs become active. "activity level" keyboard standby states. Standby definitions. internal register indicate that device powered from powered down state. Start Reset (Standby states state) start reset instigated reception commands given definition terms Standby section. following then occurs internal register indicating that device powered from powered down state read register than memory word addressed program counter loaded into tuning counter then analog values read memory. register reset then previously selected tuning analog values left unchanged. defeated volume muted period approx seconds seconds longer than other analog outputs. tuning analogue outputs, except volume, enabled after approx. seconds. volume output enabled after seconds standby output pulled internally logic internal register reset. device either power options (power standby states) selected then will perform power reset outputs command sources will remain disabled, then onthe command, start reset will performed. device required power state using momentary mechanical switch connected then will perform ordinary power reset followed immediately start reset. outputs command sources will enabled after periods defined above.
13/22
FUNCTIONAL DESCRIPTION (continued) Manual Tuning Manual tuning commands tune down, available from keyboard only provided allow both manual station search tuning adjustments. continuous tuning down command made from keyboard speed movement tuning counter shown fig. CATV bands. Time start time being pressed. When FB/sync. coincidence input logic tuning speed reduced steps/sec. time FB/sync. coincidence input logic than tuning.sweep speed jumps immediately steps/sec. these levels shifted factor respectively giving slowest speeds steps/sec. steps/sec. highest speeds 1024 steps/sec 2048 steps/sec. continuity command broken releasing keyboard example then tuning speed returns slowest speed when FB/sync. coincidence input logic upper lower limit band reached during manual tuning then tuning will continue same direction from opposite limit after 480ms delay allow discharge external network. tuning counter bits length giving range 8192 steps. band bandwidth approx. 400MHz. Thus band slowest speed steps/sec. gives tuning speed about 200kHz/sec. fastest speed step/sec. corresponds total band sweep time seconds. Program Memory Sequence continuous up/down program memory command from keyboard produces program change every 500ms. From remote control data command sources continuous program memory sequence command produces program change approx. every 500ms every received commands. memory sequence down command issued from source will bring device standby program selected before standby commanded. memory sequence down will then commence until command stopped reissued from source (until been received internally generated).
Figure Tuning Sweep Speed (UHF CATV BANDS)
TUNING SWEEP SPEED (STEP/SEC)
Time (sec)
494-12.EPS
FB/SYNC. COINCIDENCE
FB/SYNC. COINCIDENCE COINCIDENCE
FB/SYNC.
14/22
FUNCTIONAL DESCRIPTION (continued) Mute sound mute function available toggle command from command sources. There other commands functions during which sound muted FB/sync. coincidence there FB/sync. coincidence under conditions sound muted. Start reset sound muted approx. seconds. Program change sound muted seconds program change direct, program (only after second keystroke), (decade) Memory sequence up/down continuous single keystrokes. Standby states sound muted. Band sequence same program change. sound demuted under following conditions When mute command received from source. When device commanded from standby Off, i.e. device muted when standby command issued then when commanded will always start with sound demuted after reset settling period approx. seconds. Volume volume commanded whilst sound muted then volume will increase from zero. Volume down volume down commanded whilst sound muted then there effect. program change sound demuted. Momentary Switch Provision made momentary switch connected between ground force M494 make Power Start resets automatically that device attains state immediately. condition latched after reset period 110ms. Therefore period switch contact closure should min. 120ms. Figures. respectively show flow diagram form methods storing station pretuning program selection post tuning program selection. Figures. show select programme subroutine Figures. either program option program option with (decade modes).
15/22
COMMANDS
Command Programs 1-12 Source D,RC opt.) opt.) opt.) opt.) Function Reads contents memory location 2MSB's counter, next MSB's band counter next MSB's tuning counter skip flag register. Initiates command only after standby. Reads contents memory location 2MSB's counter, next MSB's band counter next MSB's tuning counter skip flag register. Initiates command only after stndby. Reads contents memory location MSB's counter, next MSB's band counter next MSB's tuning counter skip flag register. Initiates command only after standby. Sustracts from current program possible). Initiates command only after standby.
Programs
Programs 13-16
(decade) (decade)
Adds current program possible). Initiates command only after standby. opt.) opt.) Commands M494 wait program command reset other command. Display shows half digit segment flashing 5Hz. Initiates command only after standby. Increments down relevant analog control counter every keystrobe continuously every 112ms from every 102ms from data inputs. display shows up/down arrow 300ms min. Increments down tuning counter. speed increment/decrement defined Figure display shows up/down arrow 300ms min. program number (memory location) incremented/decremented. Volume Mute. mute section. Commands standby state. Commands standby state from state state from standby state. Commands state when state commands state when state. standby section. currently addressed memory location written from tuning, band counters skip flag reset. fig. Execution this command indicated display flashing second. analog control memories written sequence from analog control counters. Execution this command indicated display flashing second. Command next band sequence defined bands outputs section. step each strobe. Increments counter binary one. step each strobe. Reads analog memories sequence their corresponding D/A's. analog control outputs disabled during read sequence. Strobes program selected immediately after memory addressing command (post tuning program selection). Figure Sets skip flag currently selected program. Execution this command indicated display flashing second. Defeats function skip allow reading writing currently selected program.
Vol. up/down Bri. up/down Sat. up/down Con. up/down Tune up/down Mem. up/down Mute (toggle) Standby On/standby (toggle) ON/OFF Store Program
Store analog Controls Band Sequence Sequence Normalise Analog Memory Addressing Skip Flag Skip Defeat
Keyboard; Data; Remove Control; Option Select.
Figures respectively show flow diagram from methods storing station pretuning program selection post tuning program selection.
Figures show select program subroutine Figures either program option program option with (decade modes).
16/22
COMMANDS (continued) Figure Normal Methods Storing Station (preselection program number)
BEGIN
SELECT PROGRAM SKIP FLAG STORE
SKIP FLAG CURRENT PROGRAMME
CONTINUE
TUNE UP/DOWN
STATION TUNED
STORE
SELECTED PROGRAMME FLASHES SECOND
17/22
494-19.EPS
COMMANDS (continued) Figure Secondary Method Storing Station (postselection program number)
BEGIN
TIME UP/DOWN
STORE STATION CURRENT PROGRAMME SKIP FLAG CURRENT PROGRAMME
STATION TUNED
SKIP FLAG STORE
STORE
CONTINUE
MEMORY ADDRESSING THIS DISPLAY FLASHES UNTIL PROGRAMME SELECTION COMPLETED OTHER COMMAND GIVEN SELECTED PROGRAMME FLASHES SECOND
494-20.EPS
SELECT PROGRAMME (Direct Only)
Figure Program Selection Routine program)
BEGIN
PRESENT DESIRED PROGRAMME?
SELECT NUMBER MEMORY SEQUENCE DOWN DESIRED PROGRAMME
18/22
494-21.EPS
COMMANDS (continued) Figure Program Selection Routine program, mode)
BEGIN
UPPER DECADE SELECT AGAIN (TOGGLE) SELECT
SELECT PROGRAM
SELECT PROGRAM PREVIOUS PROGRAMME NUMBER DISPLAYED
CORRECT
Figure Program Selection Routine program, decade mode)
BEGIN
CHANGE DECADE SELECT DECADE
SELECT PROGRAM
SELECT PROGRAM NECESSARY
19/22
494-23.EPS
494-22.EPS
SEGMENT FLASHES UNTIL PROGRAM SELECTED OTHER COMMAND GIVEN
INPUT/OUTPUT PINS Figure Figure
OSC. ANDBY OUTPUT
OSC.
494-13.EPS 494-14.EPS
Figure
Figure
BAND FB/SYNC COINCIDENCE OPTION SELECT
494-15.EPS 494-16.EPS
Figure
VOL, BRI, SAT, CON, TUNING MEM. TIMING, DEFEAT DISPLAY DRIVE
Figure
a-g, h+i, DATA HANDSHAKE
494-17.EPS
20/22
494-18.EPS
500kHz
Tuning Voltage
11mA 2.2k 4.7nF BF259 5.6k TAA550 100nF 150nF 100nF 100nF +5/12V
4.7k BC297 22µF
1.6k
High Voltage
R1/4
M708
TDA8160
BC177
6.8k 1.5k 5.6k 5.6k 10µF 5.6k 10µF 5.6k 10µF 10µF 8.2k 8.2k 8.2k 5.6k 8.2k BC177 BC177 BC177 BC177 BSX93
TYPICAL APPLICATION
3.9k
Relay
3.3k
Store Prog
Store Analog Tune Tune Down Band Down
+12V
CATV
5.6k
100nF
100nF
Sync
5.6k
21/22
494-24.EPS
PACKAGE MECHANICAL DATA PINS PLASTIC PACKAGE
Dimensions
Min.
Millimeters Typ. 0.63 0.45 1.27
Max.
Min.
Inches Typ. 0.025 0.018 0.050
Max.
0.23
0.31 52.58 16.68 2.54 48.26 14.1 4.445
0.009
0.012 2.070 0.657 0.100 1.900 0.555 0.175 0.130
15.2
0.598
Information furnished believed accurate reliable. However, SGS-THOMSON Microelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. licence granted implication otherwise under patent patent rights SGS-THOMSON Microelectronics. Specifications mentioned this publication subject change without noti This publication supersedes replaces information previously supplied. SGS-THOMSON Microelectronics products authorized critical components life support devices systems without express written approval SGS-THOMSON Microelectronics. 1995 SGS-THOMSON Microelectronics Rights Reserved Purchase Components SGS-THOMSON Microelectronics, conveys license under Philips Patent. Rights these components system, granted provided that system confo Standard Specifications defined Philips. SGS-THOMSON Microelectronics GROUP COMPANIES Australia Brazil China France Germany Hong Kong Italy Japan Korea Malaysia Malta Morocco Netherlands Singapore Spain Sweden Switzerland Taiwan Thailand United Kingdom U.S.A.
22/22
PM-DIP40.EPS

NON-VOLATILE MEMORY PROGRAM WORDS TUNING VOLTAGE BITS BAND BITS MULTI

Top Searches for this datasheet

Other recent searches