dsPIC30F4011/4012
DS70135G-page 148
2010 Microchip Technology Inc.
20.13 Configuring Analog Port Pins
The use of the ADPCFG and TRIS registers control the
operation of the ADC port pins. The port pins that are
desired as analog inputs must have their corresponding
TRIS bit set (input). If the TRIS bit is cleared (output), the
digital output level (VOH or VOL) is converted.
The A/D operation is independent of the state of the
CH0SA<3:0>/CH0SB<3:0> bits and the TRIS bits.
When reading the PORT register, all pins configured as
analog input channels are read as cleared.
Pins configured as digital inputs will not convert an ana-
log input. Analog levels on any pin that is defined as a
digital input (including the ANx pins), may cause the
input buffer to consume current that exceeds the
device specifications.
20.14 Connection Considerations
The analog inputs have diodes to VDD and VSS as ESD
protection. This requires that the analog input be
between VDD and VSS. If the input voltage exceeds this
range by greater than 0.3V (either direction), one of the
diodes becomes forward biased and it may damage the
device if the input current specification is exceeded.
An external RC filter is sometimes added for anti-
aliasing of the input signal. The R component should be
selected to ensure that the sampling time requirements
are satisfied. Any external components connected (via
high-impedance) to an analog input pin (capacitor,
zener diode, etc.) should have very little leakage
current at the pin.
相关PDF资料
DSPIC33FJ64MC204-E/PT IC DSPIC MCU/DSP 64K 44-TQFP
DSPIC30F4012-30I/SO IC DSPIC MCU/DSP 48K 28SOIC
HM2H08P117LF HM2H08P117LF SHROUD STYLE B LF
PIC18LF4423-I/ML IC PIC MCU FLASH 8KX16 44QFN
ATTINY44V-10PU IC MCU AVR 4K FLASH 10MHZ 14-DIP
PIC16F77-I/P IC MCU FLASH 8KX14 A/D 40DIP
MP2-HS024-43 CONN SHROUD 2-FB 24POS 4ROW
ATTINY44V-10MU IC MCU AVR 4K FLASH 10MHZ 20-QFN
相关代理商/技术参数
DSPIC30F4012-20I/SP 功能描述:数字信号处理器和控制器 - DSP, DSC 16 Bit MCU/DSP 28LD 20M 48KB FL RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT
DSPIC30F4012-20I/SP 制造商:Microchip Technology Inc 功能描述:16BIT MCU-DSP 20MHZ 30F4012 SDIL
DSPIC30F4012-30I/ML 功能描述:数字信号处理器和控制器 - DSP, DSC Motor Control RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT
DSPIC30F4012-30I/SO 功能描述:数字信号处理器和控制器 - DSP, DSC 16 Bit MCU/DSP 28LD 30M 48KB FL RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT
DSPIC30F4012-30I/SO 制造商:Microchip Technology Inc 功能描述:16- Bit Digital Signal Controller Memory
DSPIC30F4012-30I/SP 功能描述:数字信号处理器和控制器 - DSP, DSC 16B MCU/DSP 28LD 30M 48KB FL RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT
DSPIC30F4012-30I/SP 制造商:Microchip Technology Inc 功能描述:16- Bit Digital Signal Controller Memory
dsPIC30F4012T-20E/ML 功能描述:数字信号处理器和控制器 - DSP, DSC 44LD 20MIPS 48 KB RoHS:否 制造商:Microchip Technology 核心:dsPIC 数据总线宽度:16 bit 程序存储器大小:16 KB 数据 RAM 大小:2 KB 最大时钟频率:40 MHz 可编程输入/输出端数量:35 定时器数量:3 设备每秒兆指令数:50 MIPs 工作电源电压:3.3 V 最大工作温度:+ 85 C 封装 / 箱体:TQFP-44 安装风格:SMD/SMT