参数资料
型号: PIC16F72-I/SP
厂商: Microchip Technology
文件页数: 89/136页
文件大小: 0K
描述: IC PIC MCU FLASH 2KX14 28DIP
产品培训模块: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
标准包装: 15
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
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 5.5 V
数据转换器: A/D 5x8b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 28-DIP(0.300",7.62mm)
包装: 管件
产品目录页面: 639 (CN2011-ZH PDF)
PIC16F72
DS39597C-page 54
2007 Microchip Technology Inc.
REGISTER 10-2:
ADCON1: A/D CONTROL REGISTER 1 (ADDRESS 9Fh)
The ADRES register contains the result of the A/D con-
version. When the A/D conversion is complete, the
result is loaded into the ADRES register, the GO/DONE
bit (ADCON0<2>) is cleared, and A/D interrupt flag bit
ADIF is set. The block diagram of the A/D module is
shown in Figure 10-1.
The value in the ADRES register is not modified for a
Power-on Reset. The ADRES register will contain
unknown data after a Power-on Reset.
After the A/D module has been configured as desired,
the selected channel must be acquired before the con-
version is started. The analog input channels must
have their corresponding TRIS bits selected as an
input. To determine acquisition time, see Section 10.1.
After this acquisition time has elapsed, the A/D
conversion can be started.
The following steps should be followed for doing an
A/D conversion:
1.
Configure the A/D module:
Configure analog pins/voltage reference and
digital I/O (ADCON1)
Select A/D input channel (ADCON0)
Select A/D conversion clock (ADCON0)
Turn on A/D module (ADCON0)
2.
Configure A/D interrupt (if desired):
Clear ADIF bit
Set ADIE bit
Set GIE bit
3.
Wait the required acquisition time.
4.
Start conversion:
Set GO/DONE bit (ADCON0)
5.
Wait for A/D conversion to complete, by either:
Polling for the GO/DONE bit to be cleared
OR
Waiting for the A/D interrupt
6.
Read A/D Result register (ADRES), clear bit
ADIF if required.
7.
For next conversion, go to step 1 or step 2 as
required. The A/D conversion time per bit is
defined as TAD. A minimum wait of 2 TAD is
required before the next acquisition starts.
U-0
R/W-0
PCFG2
PCFG1
PCFG0
bit 7
bit 0
bit 7-3
Unimplemented: Read as ‘0’
bit 2-0
PCFG<2:0>: A/D Port Configuration Control bits
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
A = Analog input
D = Digital I/O
PCFG2:PCFG0
RA0
RA1
RA2
RA5
RA3
VREF
000
AA
A
VDD
001
AA
A
VREF
RA3
010
AA
A
VDD
011
AA
A
VREF
RA3
100
AA
D
A
VDD
101
AA
D
VREF
RA3
11x
DD
D
VDD
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