參數(shù)資料
型號: PIC16F83
廠商: Microchip Technology Inc.
英文描述: 8-Bit CMOS Flash/EEPROM Microcontollrs(每個I/O口有20mA吸收,25mA驅(qū)動,64字節(jié)數(shù)據(jù)EEPROM,2.0V的微控制器)
中文描述: 8位CMOS閃存/ EEPROM Microcontollrs(每個的I / O口有20mA的吸收,25mA電流驅(qū)動,64字節(jié)數(shù)據(jù)的EEPROM,2.0伏的微控制器)
文件頁數(shù): 40/120頁
文件大小: 764K
代理商: PIC16F83
PIC16F8X
DS30430A-page 40
1996 Microchip Technology Inc.
TABLE 8-2:
PIC16F83/CR83/F84/CR84
CAPACITOR SELECTION
FOR CRYSTAL OSCILLATOR
8.2.3
EXTERNAL CRYSTAL OSCILLATOR
CIRCUIT
Either a prepackaged oscillator can be used or a simple
oscillator circuit with TTL gates can be built.
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 are
available; one with series resonance, and one with
parallel resonance.
Figure 8-5 shows a parallel resonant oscillator circuit.
The circuit is designed to use the fundamental
frequency of the crystal. The 74AS04 inverter performs
the 180-degree phase shift that a parallel oscillator
requires. The 4.7 k
resistor provides negative
feedback for stability. The 10 k
the 74AS04 in the linear region. This could be used for
external oscillator designs.
potentiometer biases
Mode
LP
Freq
32 kHz
200 kHz
100 kHz
2 MHz
4 MHz
4 MHz
10 MHz
OSC1/C1
68 - 100 pF
15 - 33 pF
100 - 150 pF
15 - 33 pF
15 - 33 pF
15 - 33 pF
15 - 33 pF
OSC2/C2
68 - 100 pF
15 - 33 pF
100 - 150 pF
15 - 33 pF
15 - 33 pF
15 - 33 pF
15 - 33 pF
XT
HS
Note:
Higher capacitance increases the stability of
oscillator but also increases the start-up time.
These values are for design guidance only. Rs may
be required in HS mode as well as XT mode to
avoid overdriving crystals with low drive level spec-
ification. Since each crystal has its own characteris-
tics, the user should consult the crystal
manufacturer for appropriate values of external
components.
For V
DD
> 4.5V, C1 = C2
Crystals Tested:
32.768 kHz
Epson C-001R32.768K-A
100 kHz
Epson C-2 100.00 KC-P
200 kHz
STD XTL 200.000 KHz
1.0 MHz
ECS ECS-10-13-2
2.0 MHz
ECS ECS-20-S-2
4.0 MHz
ECS ECS-40-S-4
10.0 MHz
ECS ECS-100-S-4
30 pF is recommended.
±
±
±
±
±
±
±
20 PPM
20 PPM
20 PPM
50 PPM
50 PPM
50 PPM
50 PPM
FIGURE 8-5:
EXTERNAL PARALLEL
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
Figure 8-6 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. The 330 k
the negative feedback to bias the inverters in their
linear region.
resistors provide
FIGURE 8-6:
EXTERNAL SERIES
RESONANT CRYSTAL
OSCILLATOR CIRCUIT
20 pF
+5V
20 pF
10k
4.7k
10k
74AS04
XTAL
10k
74AS04
PIC16FXX
CLKIN
To Other
Devices
330 k
74AS04
74AS04
PIC16FXX
CLKIN
To Other
Devices
XTAL
330 k
74AS04
0.1
μ
F
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PIC16F83-04/P 功能描述:8位微控制器 -MCU .875KB 36 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
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PIC16F83-04I/P 功能描述:8位微控制器 -MCU .875KB 36 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC16F83-04I/SO 功能描述:8位微控制器 -MCU .875KB 36 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 最大時鐘頻率:50 MHz 程序存儲器大小: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