参数资料
型号: PIC12F683-E/MD
厂商: Microchip Technology
文件页数: 91/176页
文件大小: 0K
描述: IC PIC MCU FLASH 2KX14 8DFN
产品培训模块: Asynchronous Stimulus
Digi-Key 应用说明: AN0005 PWM Example with Microchip's CCP Module
AN0005 Example Code
标准包装: 91
系列: PIC® 12F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 5
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
EEPROM 大小: 256 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 4x10b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 8-VDFN 裸露焊盘
包装: 管件
配用: AC164326-ND - MODULA SKT PM3 20QFN
I3-DB12F683-ND - BOARD DAUGHTER ICEPIC3
2007 Microchip Technology Inc.
DS41211D-page 19
PIC12F683
3.0
OSCILLATOR MODULE (WITH
FAIL-SAFE CLOCK MONITOR)
3.1
Overview
The Oscillator module has a wide variety of clock
sources and selection features that allow it to be used
in a wide range of applications while maximizing perfor-
mance and minimizing power consumption. Figure 3-1
illustrates a block diagram of the Oscillator module.
Clock sources can be configured from external
oscillators, quartz crystal resonators, ceramic resonators
and Resistor-Capacitor (RC) circuits. In addition, the
system clock source can be configured from one of two
internal oscillators, with a choice of speeds selectable via
software. Additional clock features include:
Selectable system clock source between external
or internal via software.
Two-Speed Start-up mode, which minimizes
latency between external oscillator start-up and
code execution.
Fail-Safe Clock Monitor (FSCM) designed to
detect a failure of the external clock source (LP,
XT, HS, EC or RC modes) and switch
automatically to the internal oscillator.
The Oscillator module can be configured in one of eight
clock modes.
1.
EC – External clock with I/O on OSC2/CLKOUT.
2.
LP – 32 kHz Low-Power Crystal mode.
3.
XT
Medium
Gain
Crystal
or
Ceramic
Resonator Oscillator mode.
4.
HS – High Gain Crystal or Ceramic Resonator
mode.
5.
RC – External Resistor-Capacitor (RC) with
FOSC/4 output on OSC2/CLKOUT.
6.
RCIO – External Resistor-Capacitor (RC) with
I/O on OSC2/CLKOUT.
7.
INTOSC – Internal oscillator with FOSC/4 output
on OSC2 and I/O on OSC1/CLKIN.
8.
INTOSCIO – Internal oscillator with I/O on
OSC1/CLKIN and OSC2/CLKOUT.
Clock Source modes are configured by the FOSC<2:0>
bits in the Configuration Word register (CONFIG). The
internal clock can be generated from two internal
oscillators.
The
HFINTOSC
is
a
calibrated
high-frequency
oscillator.
The
LFINTOSC
is
an
uncalibrated low-frequency oscillator.
FIGURE 3-1:
PIC MCU CLOCK SOURCE BLOCK DIAGRAM
(CPU and Peripherals)
OSC1
OSC2
Sleep
External Oscillator
LP, XT, HS, RC, RCIO, EC
System Clock
P
o
st
sc
aler
MU
X
MU
X
8 MHz
4 MHz
2 MHz
1 MHz
500 kHz
125 kHz
250 kHz
IRCF<2:0>
111
110
101
100
011
010
001
000
31 kHz
Power-up Timer (PWRT)
FOSC<2:0>
(Configuration Word Register)
SCS<0>
(OSCCON Register)
Internal Oscillator
(OSCCON Register)
Watchdog Timer (WDT)
Fail-Safe Clock Monitor (FSCM)
HFINTOSC
8 MHz
LFINTOSC
31 kHz
INTOSC
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