参数资料
型号: PIC16F872-E/SO
厂商: Microchip Technology
文件页数: 105/167页
文件大小: 0K
描述: IC MCU CMOS 20MHZ 2K FLSH 28SOIC
产品培训模块: Asynchronous Stimulus
标准包装: 27
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,SPI
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 22
程序存储器容量: 3.5KB(2K x 14)
程序存储器类型: 闪存
EEPROM 大小: 64 x 8
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
数据转换器: A/D 5x10b
振荡器型: 外部
工作温度: -40°C ~ 125°C
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
包装: 管件
42
8048C–AVR–02/12
ATtiny43U
Battery voltage may start to rise after the boost converter has been stopped but before the
device has been reset, for example if a battery charger is connected. In this case the converter
will start automatically after battery voltage exceeds V
START, clearing the pending request for
reset. Hence, the firmware must be prepared for a situation where stopping the boost converter
does not lead to a device reset. For this purpose, the firmware may choose to monitor the Boost
To stop the boost converter, follow the below procedure:
1.
Write 110x xxxx to the Power Reduction Register, PRR (see page 34)
2.
Within 3 clock cycles of the above, write 10xx xxxx to PRR
3.
Within 4 clock cycles of the first step, write 01xx xxxx to PRR
8.5.2
Switching to Full Duty Cycle Mode of Operation
When duty cycle control is disabled the output voltage of the boost converter will rise as fast as
possible, resulting in a minimum switching time and a maximum idle time for the converter.
To turn on Full Duty Cycle (FDC) mode, follow the below procedure:
1.
Write 110x xxxx to the Power Reduction Register, PRR (see page 34)
2.
Within 3 clock cycles of the above, write 10xx xxxx to PRR
3.
Within 4 clock cycles of the first step, write 111x xxxx to PRR
8.5.3
Switching to Normal (Variable Duty Cycle) Mode of Operation
To return duty cycle control to the boost converter, follow the below procedure:
1.
Write 111x xxxx to the Power Reduction Register, PRR (see page 34)
8.6
Component Selection
Refer to Figure 8-8 for component placement and numbering.
Figure 8-8.
Boost Converter Schematic, Including Optional Components.
8.6.1
Inductor
Low inductance increases peak currents of the inductor, creating more interference noise and
lowering the overall efficiency of the converter. Too high inductance values force the converter
into non-stable operation. The boost converter has been optimized for a certain size inductance,
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
VCC
GND
PA7
PA6
PA5
PA4
PA3
PA2
PA1
PA0
VBAT
LSW
C4
C3
C2
C1
R1
L1
D1
VIN
OPTIONAL
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相关代理商/技术参数
参数描述
PIC16F872-I/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O 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
PIC16F872-I/SO 制造商:Microchip Technology Inc 功能描述:8BIT FLASH MCU SMD 16F872 SOIC28
PIC16F872-I/SOG 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O Lead Free Package 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
PIC16F872-I/SP 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O 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
PIC16F872-I/SP 制造商:Microchip Technology Inc 功能描述:IC 8BIT FLASH MCU 16F872 SDIL28