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PIC16F73-I/SPG 参数 Datasheet PDF下载

PIC16F73-I/SPG图片预览
型号: PIC16F73-I/SPG
PDF下载: 下载PDF文件 查看货源
内容描述: [28 Pin, 7KB Std Flash, 192 RAM, 22 I/O, -40C to +85C, 28-SPDIP, TUBE]
分类和应用: 闪存微控制器
文件页数/大小: 174 页 / 3853 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC16F7X  
The A/D module has three registers. These registers  
are:  
11.0 ANALOG-TO-DIGITAL  
CONVERTER (A/D) MODULE  
A/D Result Register ((ADRES)  
A/D Control Register 0 (ADCON0)  
A/D Control Register 1 ((ADCON1)  
The 8-bit analog-to-digital (A/D) converter module has  
five inputs for the PIC16F73/76 and eight for the  
PIC16F74/77.  
The ADCON0 register, shown in Register 11-1, con-  
trols the operation of the A/D module. The ADCON1  
register, shown in Register 11-2, configures the func-  
tions of the port pins. The port pins can be configured  
as analog inputs (RA3 can also be a voltage reference),  
or as digital I/O.  
The A/D allows conversion of an analog input signal to  
a corresponding 8-bit digital number. The output of the  
sample and hold is the input into the converter, which  
generates the result via successive approximation. The  
analog reference voltage is software selectable to  
either the devices positive supply voltage (VDD), or the  
voltage level on the RA3/AN3/VREF pin.  
Additional information on using the A/D module can be  
found in the PICmicroMid-Range MCU Family Ref-  
erence Manual (DS33023) and in Application Note,  
AN546 (DS00546).  
The A/D converter has a unique feature of being able  
to operate while the device is in SLEEP mode. To oper-  
ate in SLEEP, the A/D conversion clock must be  
derived from the A/Ds internal RC oscillator.  
REGISTER 11-1: ADCON0 REGISTER (ADDRESS 1Fh)  
R/W-0  
ADCS1  
bit 7  
R/W-0  
R/W-0  
CHS2  
R/W-0  
CHS1  
R/W-0  
CHS0  
R/W-0  
U-0  
R/W-0  
ADON  
bit 0  
ADCS0  
GO/DONE  
bit 7-6  
bit 5-3  
ADCS1:ADCS0: A/D Conversion Clock Select bits  
00= FOSC/2  
01= FOSC/8  
10= FOSC/32  
11= FRC (clock derived from the internal A/D module RC oscillator)  
CHS2:CHS0: Analog Channel Select bits  
000= Channel 0 (RA0/AN0)  
001= Channel 1 (RA1/AN1)  
010= Channel 2 (RA2/AN2)  
011= Channel 3 (RA3/AN3)  
100= Channel 4 (RA5/AN4)  
101= Channel 5 (RE0/AN5)(1)  
110= Channel 6 (RE1/AN6)(1)  
111= Channel 7 (RE2/AN7)(1)  
bit 2  
GO/DONE: A/D Conversion Status bit  
If ADON = 1:  
1= A/D conversion in progress (setting this bit starts the A/D conversion)  
0= A/D conversion not in progress (this bit is automatically cleared by hardware when the  
A/D conversion is complete)  
bit 1  
bit 0  
Unimplemented: Read as '0'  
ADON: A/D On bit  
1= A/D converter module is operating  
0= A/D converter module is shut-off and consumes no operating current  
Note 1: A/D channels 5, 6 and 7 are implemented on the PIC16F74/77 only.  
Legend:  
R = Readable bit  
W = Writable bit  
U = Unimplemented bit, read as 0’  
0= Bit is cleared x = Bit is unknown  
- n = Value at POR reset  
1= Bit is set  
2002 Microchip Technology Inc.  
DS30325B-page 83