- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄365366 > PIC12F675 (Microchip Technology Inc.) 8-Pin, 8-Bit CMOS Enhanced FLASH Microcontroller with A/D Converter and EEPROM Data Memory(-2.5~5.5V,具ADC,閃速微控制器) PDF資料下載
參數(shù)資料
| 型號(hào)： | PIC12F675 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 8-Pin, 8-Bit CMOS Enhanced FLASH Microcontroller with A/D Converter and EEPROM Data Memory(-2.5~5.5V,具ADC,閃速微控制器) |
| 中文描述： | 8引腳，8位閃存微控制器的CMOS增強(qiáng)與A / D轉(zhuǎn)換器和EEPROM數(shù)據(jù)存儲(chǔ)器（-2.5?5.5V的，具藝術(shù)發(fā)展局，閃速微控制器） |
| 文件頁數(shù)： | 98/170頁 |
| 文件大?。?/td> | 4191K |
| 代理商： | PIC12F675 |
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頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁當(dāng)前第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁
PIC16F62X
DS40300C-page 96
Preliminary
2003 Microchip Technology Inc.
14.5
Power-on Reset (POR), Power-up
Timer (PWRT), Oscillator Start-up
Timer (OST) and Brown-out Detect
(BOD)
14.5.1
POWER-ON RESET (POR)
The on-chip POR circuit holds the chip in RESET until
V
DD
has reached a high enough level for proper
operation. To take advantage of the POR, just tie the
MCLR pin through a resistor to V
DD
. This will eliminate
external RC components usually needed to create
Power-on Reset. A maximum rise time for V
DD
is
required. See Electrical Specifications for details.
The POR circuit does not produce an internal RESET
when V
DD
declines.
When the device starts normal operation (exits the
RESET condition), device operating parameters (volt-
age, frequency, temperature, etc.) must be met to
ensure operation. If these conditions are not met, the
device must be held in RESET until the operating
conditions are met.
For additional information, refer to Application Note
AN607, “Power-up Trouble Shooting”.
14.5.2
POWER-UP TIMER (PWRT)
The PWRT provides a fixed 72 ms (nominal) timeout
on power-up only, from POR or Brown-out Detect
Reset. The PWRT operates on an internal RC oscilla-
tor. The chip is kept in RESET as long as PWRT is
active. The PWRT delay allows the V
DD
to rise to an
acceptable level. A configuration bit, PWRTE can
disable (if set) or enable (if cleared or programmed) the
PWRT. The PWRT should always be enabled when
Brown-out Detect Reset is enabled.
The Power-Up Time delay will vary from chip to chip
and due to V
DD
, temperature and process variation.
See DC parameters for details.
14.5.3
OSCILLATOR START-UP TIMER
(OST)
The OST provides a 1024 oscillator cycle (from OSC1
input) delay after the PWRT delay is over. This ensures
that the crystal oscillator or resonator has started and
stabilized.
The OST timeout is invoked only for XT, LP and HS
modes and only on Power-on Reset or wake-up from
SLEEP.
14.5.4
BROWN-OUT DETECT (BOD)
RESET
The PIC16F62X members have on-chip BOD circuitry.
A configuration bit, BODEN, can disable (if clear/
programmed) or enable (if set) the BOD Reset circuitry.
If V
DD
falls below V
BOD
for longer than T
BOD
, the
brown-out situation will RESET the chip. A RESET is
not guaranteed to occur if V
DD
falls below V
BOD
for
shorter than T
BOD
. V
BOD
and T
BOD
are defined in
Table 17-1 and Table 17-6, respectively.
On any RESET (Power-on, Brown-out, Watchdog, etc.)
the chip will remain in RESET until V
DD
rises above
V
BOD
. The Power-up Timer will now be invoked and will
keep the chip in RESET an additional 72 ms.
If V
DD
drops below V
BOD
while the Power-up Timer is
running, the chip will go back into a Brown-out Detect
Reset and the Power-up Timer will be re-initialized.
Once V
DD
rises above V
BOD
, the Power-Up Timer will
execute a 72 ms RESET. The Power-up Timer should
always be enabled when Brown-out Detect is enabled.
Figure 14-7 shows typical Brown-out situations.
FIGURE 14-7:
BROWN-OUT SITUATIONS
72 MS
V
BOD
V
DD
INTERNAL
RESET
V
BOD
V
DD
INTERNAL
RESET
72 MS
<72 MS
72 MS
V
BOD
V
DD
INTERNAL
RESET
≥
T
BOD
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC12F676 | 8-Pin, 8-Bit CMOS Enhanced FLASH Microcontroller with A/D Converter and EEPROM Data Memory(-2.5~5.5V,具ADC,閃速微控制器) |
| PIC12F680 | 8-Pin, 8-Bit CMOS Enhanced FLASH Microcontroller with Serial I/O Interface(-2.0~5.5V,串行I/O接口,閃速微控制器) |
| PIC12F681 | 8-Pin, 8-Bit CMOS Enhanced FLASH Microcontroller with Serial I/O Interface(-2.0~5.5V,串行I/O接口,閃速微控制器) |
| PIC16C164 | OTP 8-Bit High-Performance CMOS Microcontroller(主從模式，工作電壓3.0~5.5V，2路PWM的微控制器) |
| PIC16C165 | OTP 8-Bit High-Performance CMOS Microcontroller(主從模式，工作電壓3.0~5.5V，2路PWM的微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC12F675 DEVELOPMENT BOARD KIT | 功能描述:DEVELOPMENT BOARD FOR PIC12F675 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時(shí)/停產(chǎn)零件編號(hào) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:* |
| PIC12F675 DEVELOPMENT KIT | 功能描述:EMBEDDED C DEVELOPMENT KIT RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時(shí)/停產(chǎn)零件編號(hào) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| PIC12F675 I/SN0547 | 制造商:Microchip Technology Inc 功能描述: |
| PIC12F675-E | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, Flash-Based 8-Bit CMOS Microcontrollers |
| PIC12F675-E/MD | 功能描述:8位微控制器 -MCU 1.75KB 64 RAM 6I/O Ext Temp QFN RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。