参数资料
型号: PIC18F66J93T-I/PT
厂商: Microchip Technology
文件页数: 26/54页
文件大小: 0K
描述: IC PIC MCU FLASH 64KB 64-TQFP
产品培训模块: PIC18 J Series MCU Overview
标准包装: 1,200
系列: PIC® 18F
核心处理器: PIC
芯体尺寸: 8-位
速度: 48MHz
连通性: I²C,LIN,SPI,UART/USART
外围设备: 欠压检测/复位,LCD,LVD,POR,PWM,WDT
输入/输出数: 51
程序存储器容量: 64KB(32K x 16)
程序存储器类型: 闪存
RAM 容量: 3923 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 3.6 V
数据转换器: A/D 12x12b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-TQFP
包装: 带卷 (TR)
PIC18F87J93 FAMILY
DS39948A-page 30
Preliminary
2009 Microchip Technology Inc.
The analog reference voltage is software selectable to
either the device’s positive and negative supply voltage
(AVDD and AVSS) or the voltage level on the RA3/AN3/
VREF+ and RA2/AN2/VREF- pins.
The A/D converter has a unique feature of being able
to operate while the device is in Sleep mode. To
operate in Sleep, the A/D conversion clock must be
derived from the A/D’s internal RC oscillator.
The output of the sample and hold is the input into the
converter, which generates the result via successive
approximation.
Each port pin associated with the A/D converter can be
configured as an analog input or as a digital I/O. The
ADRESH and ADRESL registers contain the result of the
A/D conversion. When the A/D conversion is complete,
the result is loaded into the ADRESH:ADRESL register
pair, the GO/DONE bit (ADCON0<1>) is cleared and the
A/D Interrupt Flag bit, ADIF, is set.
A device Reset forces all registers to their Reset state.
This forces the A/D module to be turned off and any
conversion in progress is aborted. The value in the
ADRESH:ADRESL register pair is not modified for a
Power-on Reset. These registers will contain unknown
data after a Power-on Reset.
The block diagram of the A/D module is shown in
FIGURE 2-1:
A/D BLOCK DIAGRAM(1,2)
(Input Voltage)
VAIN
VREF+
Reference
Voltage
AVDD
VCFG<1:0>
CHS<3:0>
AN7
AN6
AN4
AN3
AN2
AN1
AN0
0111
0110
0100
0011
0010
0001
0000
12-Bit
A/D
VREF-
AVSS
Converter
AN11
AN10
AN9
AN8
1011
1010
1001
1000
Note 1: Channels AN15 through AN12 are not available on PIC18F6XJ93 devices.
2: I/O pins have diode protection to VDD and VSS.
AN5
0101
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