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参数资料
型号： PIC12F1840-E/P
厂商： Microchip Technology
文件页数： 69/122页
文件大小： 0K
描述： MCU 7KB FLASH 256B RAM XLP 8PDIP
产品培训模块： 8-bit PIC® Microcontroller Portfolio
标准包装： 60
系列： PIC® XLP™ 12F
核心处理器： PIC
芯体尺寸： 8-位
速度： 32MHz
连通性： I²C，LIN，SPI，UART/USART
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： 7KB（4K x 14）
程序存储器类型： 闪存
EEPROM 大小： 256 x 8
RAM 容量： 256 x 8
电压 - 电源 (Vcc/Vdd)： 2.3 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-DIP（0.300"，7.62mm）
包装： 管件
PIC12(L)F1840
DS41441B-page 50
Preliminary
2011 Microchip Technology Inc.
FIGURE 5-3:
QUARTZ CRYSTAL
OPERATION (LP, XT OR
HS MODE)
FIGURE 5-4:
CERAMIC RESONATOR
OPERATION
(XT OR HS MODE)
5.2.1.3
Oscillator Start-up Timer (OST)
If the oscillator module is configured for LP, XT or HS
modes, the Oscillator Start-up Timer (OST) counts
1024 oscillations from OSC1. This occurs following a
Power-on Reset (POR) and when the Power-up Timer
(PWRT) has expired (if configured), or a wake-up from
Sleep. During this time, the program counter does not
increment and program execution is suspended. The
OST ensures that the oscillator circuit, using a quartz
crystal resonator or ceramic resonator, has started and
is providing a stable system clock to the oscillator
module.
In order to minimize latency between external oscillator
start-up and code execution, the Two-Speed Clock
Start-up mode can be selected (see Section 5.4
“Two-Speed Clock Start-up Mode”
).
5.2.1.4
4X PLL
The oscillator module contains a 4X PLL that can be
used with both external and internal clock sources to
provide a system clock source. The input frequency for
the 4X PLL must fall within specifications. See the PLL
Clock
Timing
Specifications
in
Section 30.0
“Electrical Specifications”
.
The 4X PLL may be enabled for use by one of two
methods:
1.
Program the PLLEN bit in Configuration Word 2
to a ‘1’.
2.
Write the SPLLEN bit in the OSCCON register to
a ‘1’. If the PLLEN bit in Configuration Word 2 is
programmed to a ‘1’, then the value of SPLLEN
is ignored.
Note 1:
Quartz
crystal
characteristics
vary
according
to
type,
package
and
manufacturer. The user should consult the
manufacturer data sheets for specifications
and recommended application.
2:
Always verify oscillator performance over
the VDD and temperature range that is
expected for the application.
3:
For oscillator design assistance, reference
the following Microchip Applications Notes:
AN826, “Crystal Oscillator Basics and
Crystal Selection for rfPIC and PIC
Devices
” (DS00826)
AN849, “Basic PIC Oscillator Design”
(DS00849)
AN943, “Practical PIC Oscillator
Analysis and Design
” (DS00943)
AN949, “Making Your Oscillator Work”
(DS00949)
Note 1:
A series resistor (RS) may be required for
quartz crystals with low drive level.
2:
The value of RF varies with the Oscillator mode
selected (typically between 2 M
to 10 M.
C1
C2
Quartz
RS(1)
OSC1/CLKIN
RF(2)
Sleep
To Internal
Logic
PIC MCU
Crystal
OSC2/CLKOUT
Note 1:
A series resistor (RS) may be required for
ceramic resonators with low drive level.
2:
The value of RF varies with the Oscillator mode
selected (typically between 2 M
to 10 M.
3:
An additional parallel feedback resistor (RP)
may be required for proper ceramic resonator
operation.
C1
C2 Ceramic
RS(1)
OSC1/CLKIN
RF(2)
Sleep
To Internal
Logic
PIC MCU
RP(3)
Resonator
OSC2/CLKOUT
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相关代理商/技术参数
参数描述
PIC12F1840-I/MF 功能描述:8位微控制器 -MCU 7KB Flash EEPROM 256b 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
PIC12F1840-I/MF 制造商:Microchip Technology Inc 功能描述:; Controller Family/Series:PIC12F; Core
PIC12F1840-I/P 功能描述:8位微控制器 -MCU 7KB Flash EEPROM 256b 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
PIC12F1840-I/PC01 制造商:Microchip Technology Inc 功能描述:
PIC12F1840-I/SN 功能描述:8位微控制器 -MCU 7KB Flash EEPROM 256b 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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