- 您現在的位置：買賣IC網 > PDF目錄385870 > ST6393B1 (意法半導體) 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD PDF資料下載
參數資料
| 型號： | ST6393B1 |
| 廠商： | 意法半導體 |
| 英文描述： | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| 中文描述： | 8位微控制器HCMOS電視頻率合成帶OSD |
| 文件頁數： | 25/68頁 |
| 文件大?。?/td> | 560K |
| 代理商： | ST6393B1 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁當前第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
VA000200
TO ST6
RESET
ST6
INTERNAL RESET
OSCILLATOR
SIGNAL
WATCHDOG RESET
V
DD
300k
RESET
(ACTIVE LOW)
COUNTER
1.0k
Figure22. InternalReset Circuit
RESET
TheST639xdevicescanberesetintwoways:bythe
external reset input (RESET) tied low and by the
hardwareactivateddigital watchdogperipheral.
RESETInput
The external activelow reset pin is usedto reset the
ST638x devices and provide an orderly software
startup procedure. The activation of the Reset pin
may occur at any time in the RUN or WAIT mode.
Even short pulses at the reset pin will be accepted
sincetheresetsignal islatchedinternallyandis only
cleared after 2048 clocks at the oscillator pin. The
clocksfrom theoscillatorpinto theresetcircuitry are
buffered by a schmitt trigger so that an oscillator in
start-up conditions will not give spurious clocks.
Whenthereset pinisheldlow,theexternalcrystalos-
cillatorisalso disabledin orderto reducecurrentcon-
sumption.TheMCU is configuredin theResetmode
as long as the signal of the RESET pin is low. The
processingoftheprogramisstoppedandthestandard
Input/Outputports(portA,portBandportC)areinthe
inputstate.As soon asthe level on the reset pin be-
comes high, the initialization sequence is executed.
RefertotheMCU initializationsequencefor additional
information.
Watchdog Reset
The ST639x devices are provided withan on-chip
hardware activateddigital watchdog function inor-
der to providea graceful recovery from a software
upset.Ifthe watchdogregisteris notrefreshedand
the end-of-count is reached, then the reset state
will be latched into the MCU and an internal circuit
pulls down the reset pin. This also resets the
watchdog which subsequently turns off the pull-
down and activates the pull-up device at the reset
pin. This causesthe positive transition at the reset
pin. The MCU will then exit the reset state after
2048 clocks on the oscillator pin.
Application Notes
An external resistorbetweenV
DD
andthe reset pin
is not required because an internal pull-up device
is provided.Theusermay preferto addan external
pull-up resistor.
An internal Power-on device does not guarantee
that the MCU will exit the reset state when V
DD
is
above 4.5V and therefore the RESET pin should
be externallycontrolled.
ST6391,92,93,95,97,99
21/64
相關PDF資料 |
PDF描述 |
|---|---|
| ST6395B1 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6391B1 | MOSFET; Transistor Polarity:Dual N Channel; Continuous Drain Current, Id:2.6A; On-Resistance, Rds(on):0.18ohm; Package/Case:8-SOIC; Leaded Process Compatible:No; Mounting Type:surface mount; Peak Reflow Compatible (260 C):No |
| ST6392 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6393 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6395 | 8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
相關代理商/技術參數 |
參數描述 |
|---|---|
| ST6395 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6395B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6397 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6397B1 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
| ST6399 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8-BIT HCMOS MCUs FOR TV FREQUENCY SYNTHESIS WITH OSD |
發(fā)布緊急采購，3分鐘左右您將得到回復。