M494

M494 SINGLE-CHIP VOLTAGE TUNING SYSTEM WITH 4 ANALOG CONTROLS AND µP INTERFACE . . . . . . . . . . . . . . . . . . . . . . NON-VOLATILE MEMORY FOR 20 PROGRAM WORDS (17 BIT x 20) - TUNING VOLTAGE 12 BITS - BAND 2 BITS - MULTI STANDARD 2 BITS - PROGRAM SKIP BIT 1 BIT - 10,000 MODIFY CYCLES PER WORD - MIN. 10 YEARS DATA RETENTION 13 BIT VOLTAGE SYNTHESIZER (BRM + PWM) NV MEMORY FOR 4 ANALOG CONTROLS (6 BIT x 4) 4 BAND SWITCH OUTPUTS (VHF I & III, UHF, CATV) 5 x 7 KEYBOARD 2 AUDIO VISUAL OUTPUTS (VCR & PC) 2 CODED MULTI STANDARD OUTPUTS (e.g. PAL, SECAM, NTSC etc.) DIRECT 11/2 DIGIT 7 SEGMENT COMMON ANODE LED DISPLAY DRIVING PCM REMOTE CONTROL RECEIVER (M708 transmitter) 5-BIT DATA INPUT + CONTROL LINE FOR P INTERFACE LINEAR AFC DEFEAT OUTPUT FLYBACK/SYNC. COINCIDENCE INPUT FOR SEMI-AUTOMATIC SEARCH STANDBY OUTPUT OPTION SELECT : 16 OR 20 PROGRAMS POWER UP MODE PROGRAM SKIP DEFEAT AV OPTIONS 1 * OR DECADE MODE OPTION IN 20 PROGRAM OPTION TEMPORARY ANALOG UP/DOWN INDICATOR ON LED DISPLAY BAND SKIP OPTION 455 TO 510kHz CHEAP CERAMIC RESONATOR VDD = 5V ± 5%. VPP = 25V ± 1V pable of including a floating gate NV memory cell (EEPROM). The i.c. has been designed as a complete digital TV tuning system based on the voltage synthesis principle and as a replacement for all the conventional potentiometers and band switches particularly in low cost TV sets. It also provides some functions normally only associated with higher cost sets. NV memory is integrated on the chip together with all ...