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參數(shù)資料
| 型號： | M494 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | SINGLE-CHIP VOLTAGE TUNING SYSTEM WITH 4 ANALOG CONTROLS AND mP INTERFACE |
| 中文描述： | 單片電壓調(diào)整系統(tǒng)，4模擬控制和MP接口 |
| 文件頁數(shù)： | 1/22頁 |
| 文件大?。?/td> | 223K |
| 代理商： | M494 |
M494
SINGLE-CHIP VOLTAGE TUNING SYSTEM WITH
4 ANALOG CONTROLS AND
μ
P INTERFACE
.
NON-VOLATILE MEMORY FOR 20 PRO-
GRAM WORDS (17 BIT x 20)
- TUNING VOLTAGE 12 BITS
- BAND2 BITS
- MULTI STANDARD 2 BITS
- PROGRAMSKIP BIT 1 BIT
- 10,000MODIFY CYCLES PER WORD
- MIN.10 YEARSDATARETENTION
.
13BITVOLTAGESYNTHESIZER(BRM +PWM)
.
NV MEMORY FOR 4 ANALOG CONTROLS
(6 BITx 4)
.
4 BANDSWITCH OUTPUTS
(VHF I & III, UHF, CATV)
.
5 x 7KEYBOARD
.
2 AUDIOVISUAL OUTPUTS (VCR & PC)
.
2 CODED MULTI STANDARD OUTPUTS
(e.g. PAL, SECAM, NTSC etc.)
.
DIRECT 1
1/2
DIGIT 7 SEGMENT COMMON
ANODE LED DISPLAYDRIVING
.
PCM REMOTE CONTROLRECEIVER
(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 SKIPDEFEAT
.
AV OPTIONS
.
1 * OR DECADE MODE OPTION IN 20 PRO-
GRAM OPTION
.
TEMPORARY ANALOG UP/DOWN INDICA-
TOR ON LED DISPLAY
.
BANDSKIP OPTION
.
455TO510kHzCHEAPCERAMIC RESONATOR
.
V
DD
= 5V
±
5%. V
PP
= 25V
±
1V
June 1991
DIP40
(Plastic Package)
ORDER CODE
: M494B1
DESCRIPTION
The M494 is a monolithic LSI integrated circuit
fabricatedinSGS-THOMSON’sEPM2process; an
N-channel, Planox, double poly MOS process ca-
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 replacementfor all the conven-
tional potentiometers and band switches particu-
larly in low cost TV sets. It also provides some
functionsnormallyonly associatedwithhighercost
sets. NVmemory is integratedonthe chip together
withallthenecessarycontrolcircuitrytoprovidethe
program memory. Separate NV memory is also
integrated to provide the memory for four analog
controls. A seven segment LED display can be
directly driven by the chip to display the program
selected, and the direction of movement of the
analog controls. Provision is made for a remote
control receiver both on and off chip, the latter is
interfaced via a data input and single control line.
(Thisenablescontrolby a microprocessor).Alocal
keyboard can be used with the device in a variety
of configurations.An option select pinprovides for
different program number options, power up op-
tions and skip associatedfunctions.This device is
anothersignificantstep towardsthe complete inte-
gration of TV control circuitry.
The device is packaged in a 40 pin DIL plastic
package.
1/22
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