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| 型号： | PIC18F25J10-I/SP |
| 厂商： | Microchip Technology |
| 文件页数： | 35/80页 |
| 文件大小： | 0K |
| 描述： | IC PIC MCU FLASH 16KX16 28DIP |
| 产品培训模块： | Asynchronous Stimulus PIC18 J Series MCU Overview 8-bit PIC® Microcontroller Portfolio |
| 标准包装： | 15 |
| 系列： | PIC® 18F |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 40MHz |
| 连通性： | I²C，SPI，UART/USART |
| 外围设备： | 欠压检测/复位，POR，PWM，WDT |
| 输入/输出数： | 21 |
| 程序存储器容量： | 32KB（16K x 16） |
| 程序存储器类型： | 闪存 |
| RAM 容量： | 1K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 2.7 V ~ 3.6 V |
| 数据转换器： | A/D 10x10b |
| 振荡器型： | 内部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 28-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 产品目录页面： | 643 (CN2011-ZH PDF) |
| 配用： | AC162074-ND - HEADER INTRFC MPLAB ICD2 44TQFP MA180011-ND - MODULE PLUG-IN 18F25J10 28SOIC AC162067-ND - HEADER INTRFC MPLAB ICD2 40/28P AC164329-ND - MODULE SKT FOR 40DIP 18F45J10 |
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PIC16F8X
DS30430C-page 40
1998 Microchip Technology Inc.
FIGURE 8-4:
EXTERNAL CLOCK INPUT
OPERATION (HS, XT OR LP
OSC CONFIGURATION)
TABLE 8-1
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
TABLE 8-2
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
potentiometer biases
the 74AS04 in the linear region. This could be used for
external oscillator designs.
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
resistors provide
the negative feedback to bias the inverters in their
linear region.
Ranges Tested:
Mode
Freq
OSC1/C1
OSC2/C2
XT
455 kHz
2.0 MHz
4.0 MHz
47 - 100 pF
15 - 33 pF
47 - 100 pF
15 - 33 pF
HS
8.0 MHz
10.0 MHz
15 - 33 pF
Note :
Recommended values of C1 and C2 are identical to
the ranges tested table.
Higher capacitance increases the stability of the
oscillator but also increases the start-up time.
These values are for design guidance only. Since
each resonator has its own characteristics, the user
should consult the resonator manufacturer for the
appropriate values of external components.
Resonators Tested:
455 kHz
Panasonic EFO-A455K04B
± 0.3%
2.0 MHz
Murata Erie CSA2.00MG
± 0.5%
4.0 MHz
Murata Erie CSA4.00MG
± 0.5%
8.0 MHz
Murata Erie CSA8.00MT
± 0.5%
10.0 MHz
Murata Erie CSA10.00MTZ
± 0.5%
None of the resonators had built-in capacitors.
Mode
Freq
OSC1/C1
OSC2/C2
LP
32 kHz
200 kHz
68 - 100 pF
15 - 33 pF
68 - 100 pF
15 - 33 pF
XT
100 kHz
2 MHz
4 MHz
100 - 150 pF
15 - 33 pF
100 - 150 pF
15 - 33 pF
HS
4 MHz
10 MHz
15 - 33 pF
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 speci-
fication. Since each crystal has its own characteris-
tics, the user should consult the crystal
manufacturer for appropriate values of external
components.
For VDD > 4.5V, C1 = C2
≈ 30 pF is recommended.
OSC1
OSC2
Open
Clock from
ext. system
PIC16FXX
Crystals Tested:
32.768 kHz
Epson C-001R32.768K-A
± 20 PPM
100 kHz
Epson C-2 100.00 KC-P
± 20 PPM
200 kHz
STD XTL 200.000 KHz
± 20 PPM
1.0 MHz
ECS ECS-10-13-2
± 50 PPM
2.0 MHz
ECS ECS-20-S-2
± 50 PPM
4.0 MHz
ECS ECS-40-S-4
± 50 PPM
10.0 MHz
ECS ECS-100-S-4
± 50 PPM
20 pF
+5V
20 pF
10k
4.7k
10k
74AS04
XTAL
10k
74AS04
PIC16FXX
CLKIN
To Other
Devices
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC18F25J10T-I/ML | 功能描述:8位微控制器 -MCU 32 KB FL 1024 RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC18F25J10T-I/SO | 功能描述:8位微控制器 -MCU 32 KB FL 1024 RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC18F25J10T-I/SS | 功能描述:8位微控制器 -MCU 16 KB FL 1 KB RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC18F25J11-I/ML | 功能描述:8位微控制器 -MCU 32KB Flash 4KBRAM 12MIPS nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
| PIC18F25J11-I/SO | 功能描述:8位微控制器 -MCU 32KB Flash 4KBRAM 12MIPS nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT |
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