- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368023 > PIC12F519 (Microchip Technology Inc.) 8-Pin, 8-Bit Flash Microcontroller PDF資料下載
參數(shù)資料
| 型號(hào)： | PIC12F519 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 8-Pin, 8-Bit Flash Microcontroller |
| 中文描述： | 8引腳，8位閃存微控制器 |
| 文件頁數(shù)： | 40/88頁 |
| 文件大小： | 802K |
| 代理商： | PIC12F519 |
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頁當(dāng)前第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
PIC12F519
DS41319A-page 38
Preliminary
2007 Microchip Technology Inc.
8.2.3
EXTERNAL CRYSTAL OSCILLATOR
CIRCUIT
Either a prepackaged oscillator or a simple oscillator
circuit with TTL gates can be used as an external crystal
oscillator circuit. Prepackaged oscillators provide a wide
operating range and better stability. A well-designed
crystal oscillator will provide good performance with TTL
gates. Two types of crystal oscillator circuits can be
used: one with parallel resonance, or one with series
resonance.
Figure 8-3 shows implementation of a parallel resonant
oscillator circuit. The circuit is designed to use the fun-
damental frequency of the crystal. The 74AS04 inverter
performs the 180-degree phase shift that a parallel
oscillator requires. The 4.7 k
Ω
resistor provides the
negative feedback for stability. The 10 k
Ω
potentiome-
ters bias the 74AS04 in the linear region. This circuit
could be used for external oscillator designs.
FIGURE 8-3:
EXTERNAL PARALLEL
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
Figure 8-4 shows a series resonant oscillator circuit.
This circuit is also designed to use the fundamental
frequency of the crystal. The inverter performs a
180-degree phase shift in a series resonant oscillator
circuit. The 330
Ω
resistors provide the negative
feedback to bias the inverters in their linear region.
FIGURE 8-4:
EXTERNAL SERIES
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
8.2.4
EXTERNAL RC OSCILLATOR
For timing insensitive applications, the RC circuit option
offers additional cost savings. The RC oscillator fre-
quency is a function of the supply voltage, the resistor
(R
EXT
) and capacitor (C
EXT
) values, and the operating
temperature. In addition to this, the oscillator frequency
will vary from unit-to-unit due to normal process param-
eter variation. Furthermore, the difference in lead frame
capacitance between package types will also affect the
oscillation frequency, especially for low C
EXT
values.
The user also needs to take into account variation due
to tolerance of external R and C components used.
Figure 8-5 shows how the R/C combination is con-
nected to the PIC12F519 device. For R
EXT
values
below 3.0 k
Ω
, the oscillator operation may become
unstable, or stop completely. For very high R
EXT
values
(e.g., 1 M
Ω
), the oscillator becomes sensitive to noise,
humidity and leakage. It is recommended keeping
R
EXT
between 5.0 k
Ω
and 100 k
Ω
.
Although the oscillator will operate with no external
capacitor (C
EXT
=
0
pF), it is recommended using
values above 20 pF for noise and stability reasons.
With no or small external capacitance, the oscillation
frequency can vary dramatically due to changes in
external capacitances, such as PCB trace capacitance
or package lead frame capacitance.
Section 11.0 “Electrical Characteristics”
, shows RC
frequency variation from part-to-part due to normal
process variation. The variation is larger for larger val-
ues of R (since leakage current variation will affect RC
frequency more for large R) and for smaller values of C
(since variation of input capacitance will affect RC
frequency more).
Also, see the Electrical Specifications section for
variation of oscillator frequency due to V
DD
for given
R
EXT
/C
EXT
values, as well as frequency variation due
to operating temperature for given R, C and V
DD
values.
FIGURE 8-5:
EXTERNAL RC
OSCILLATOR MODE
20 pF
+5V
20 pF
10k
4.7k
10k
74AS04
XTAL
10k
74AS04
PIC12F519
CLKIN
To Other
Devices
330
74AS04
74AS04
CLKIN
To Other
Devices
XTAL
330
74AS04
0.1 mF
PIC12F519
V
DD
R
EXT
C
EXT
V
SS
OSC1
Internal
clock
PIC16F519
N
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIC12F609 | 8-bit PIC㈢ Microcontrollers with High Voltage Support and Fan Control Capabilities |
| PIC12F615 | 8-bit PIC㈢ Microcontrollers with High Voltage Support and Fan Control Capabilities |
| PIC12HV609 | 8-bit PIC㈢ Microcontrollers with High Voltage Support and Fan Control Capabilities |
| PIC12HV615 | 8-Pin Flash-Based, 8-Bit CMOS Microcontrollers |
| PIC16C505-04 | 14-Pin, 8-Bit CMOS Microcontroller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC12F519_08 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit Flash Microcontrollers |
| PIC12F519-E/MC | 功能描述:8位微控制器 -MCU 15KB Flash Prgrm 64B 8MHz Intrnl Oscilatr 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 |
| PIC12F519-E/MS | 功能描述:8位微控制器 -MCU 15KB Flash Prgrm 64B 8MHz Intrnl Oscilatr 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 |
| PIC12F519-E/P | 功能描述:8位微控制器 -MCU 15KB Flash Prgrm 64B 8MHz Intrnl Oscilatr 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 |
| PIC12F519-E/SN | 功能描述:8位微控制器 -MCU 15KB Flash Prgrm 64B 8MHz Intrnl Oscilatr 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)。