- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368025 > PIC16LF84A (Microchip Technology Inc.) 18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller PDF資料下載
參數(shù)資料
| 型號(hào)： | PIC16LF84A |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 18-pin Enhanced Flash/EEPROM 8-Bit Microcontroller |
| 中文描述： | 18引腳增強(qiáng)型閃存/ EEPROM的8位微控制器 |
| 文件頁數(shù)： | 25/68頁 |
| 文件大小： | 494K |
| 代理商： | PIC16LF84A |
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(dāng)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
PIC16F84A
1998 Microchip Technology Inc.
Preliminary
DS35007A-page 25
6.4
Power-on Reset (POR)
A Power-on Reset pulse is generated on-chip when
V
DD
rise is detected (in the range of 1.2V - 1.7V). To
take advantage of the POR, just tie the MCLR pin
directly (or through a resistor) to V
DD
. This will
eliminate external RC components usually needed to
create Power-on Reset. A minimum rise time for V
DD
must be met for this to operate properly. See Electrical
Specifications for details.
When the device starts normal operation (exits the
reset condition), device operating parameters (voltage,
frequency, temperature, ...) must be meet 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"
The POR circuit does not produce an internal reset
when V
DD
declines.
6.5
Power-up Timer (PWRT)
The Power-up Timer (PWRT) provides a fixed 72 ms
nominal time-out (T
PWRT
) from POR (Figure 6-7,
Figure 6-8, Figure 6-9 and Figure 6-10). The Power-up
Timer operates on an internal RC oscillator. The chip is
kept in reset as long as the PWRT is active. The PWRT
delay allows the V
DD
to rise to an acceptable level (Pos-
sible exception shown in Figure 6-10).
A configuration bit, PWRTE, can enable/disable the
PWRT. See Figure 6-1 for the operation of the PWRTE
bit for a particular device.
The power-up time delay T
PWRT
will vary from chip to
chip due to V
DD
, temperature, and process variation.
See DC parameters for details.
6.6
Oscillator Start-up Timer (OST)
The Oscillator Start-up Timer (OST) provides a 1024
oscillator cycle delay (from OSC1 input) after the
PWRT delay ends (Figure 6-7, Figure 6-8, Figure 6-9
and Figure 6-10). This ensures the crystal oscillator or
resonator has started and stabilized.
The OST time-out (T
OST
) is invoked only for XT, LP and
HS modes and only on Power-on Reset or wake-up
from SLEEP.
When V
DD
rises very slowly, it is possible that the
T
PWRT
time-out and T
OST
time-out will expire before
V
DD
has reached its final value. In this case
(Figure 6-10), an external power-on reset circuit may
be necessary (Figure 6-6).
FIGURE 6-6:
EXTERNAL POWER-ON
RESET CIRCUIT (FOR SLOW
V
DD
POWER-UP)
Note 1: External Power-on Reset circuit is required
only if V
DD
power-up rate is too slow. The
diode D helps discharge the capacitor
quickly when V
DD
powers down.
2: R < 40 k
is recommended to make sure
that voltage drop across R does not exceed
0.2V (max leakage current spec on MCLR
pin is 5
μ
A). A larger voltage drop will
degrade V
IH
level on the MCLR pin.
3: R1 = 100
to 1 k
will limit any current
flowing into MCLR from external
capacitor C in the event of an MCLR pin
breakdown due to ESD or EOS.
C
R1
R
D
V
DD
MCLR
PIC16FXX
V
DD
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC17C42 | High-Performance 8-Bit CMOS EPROM/ROM Microcontroller(每個(gè)I/O口有20mA吸收,35mA驅(qū)動(dòng),2K 位EPROM微控制器) |
| pic17cr43 | High-Performance 8-Bit CMOS EPROM/ROM Microcontroller(每個(gè)I/O口有20mA吸收,35mA驅(qū)動(dòng),4K位EPROM) |
| PIC17C42A | High-Performance 8-Bit CMOS EPROM/ROM Microcontroller(每個(gè)I/O口有20mA吸收,35mA驅(qū)動(dòng),2K位EPROM微控制器) |
| PIC17C43 | High-Performance 8-Bit CMOS EPROM/ROM Microcontroller(每個(gè)I/O口有20mA吸收,35mA驅(qū)動(dòng),4K位EPROM微控制器) |
| PIC17C44 | High-Performance 8-Bit CMOS EPROM/ROM Microcontroller(每個(gè)I/O口有20mA吸收,35mA驅(qū)動(dòng),8K位EPROM微控制器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC16LF84A-04/P | 功能描述:8位微控制器 -MCU 1.75KB 68 RAM 13 I/O 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 |
| PIC16LF84A-04/P | 制造商:Microchip Technology Inc 功能描述:8-Bit Microcontroller IC |
| PIC16LF84A-04/P | 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU 制造商:Microchip Technology Inc 功能描述:IC, 8BIT FLASH MCU |
| PIC16LF84A-04/SO | 功能描述:8位微控制器 -MCU 1.75KB 68 RAM 13 I/O 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 |
| PIC16LF84A-04/SS | 功能描述:8位微控制器 -MCU 1.75KB 68 RAM 13 I/O 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，3分鐘左右您將得到回復(fù)。