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PIC12F635-I/SN 参数 Datasheet PDF下载

PIC12F635-I/SN图片预览
型号: PIC12F635-I/SN
PDF下载: 下载PDF文件 查看货源
内容描述: 8月14日引脚,基于闪存的8位CMOS微控制器采用纳瓦技术 [8/14-Pin, Flash-Based 8-Bit CMOS Microcontrollers with nanoWatt Technology]
分类和应用: 闪存微控制器和处理器外围集成电路光电二极管PC时钟
文件页数/大小: 234 页 / 3856 K
品牌: MICROCHIP [ MICROCHIP ]
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PIC12F635/PIC16F636/639  
The port pins denoted as “A” will read as a ‘0’  
regardless of the state of the I/O pin or the I/O control  
TRIS bit. Pins used as analog inputs should also have  
the corresponding TRIS bit set to ‘1’ to disable the  
digital output driver. Pins denoted as “D” should have  
the corresponding TRIS bit set to ‘0’ to enable the  
digital output driver.  
7.3  
Comparator Configuration  
There are eight modes of operation for the comparator.  
The CM<2:0> bits of the CMCON0 register are used to  
select these modes as shown in Figures 7-6 and 7-7.  
I/O lines change as a function of the mode and are  
designed as follows:  
• Analog function (A): digital input buffer is disabled  
Note:  
Comparator interrupts should be disabled  
during a Comparator mode change to  
prevent unintended interrupts.  
• Digital function (D): comparator digital output,  
overrides port function  
• Normal port function (I/O): independent of  
comparator  
FIGURE 7-6:  
COMPARATOR I/O OPERATING MODES (PIC12F635)  
Comparator Reset (POR Default Value – low power)  
Comparator w/o Output and with Internal Reference  
CM<2:0> = 000  
CM<2:0> = 100  
A
CIN-  
CIN+  
A
A
CIN-  
(1)  
COUT  
Off  
I/O  
CIN+  
I/O  
COUT (pin)  
I/O  
COUT (pin)  
From CVREF Module  
Comparator with Output  
Multiplexed Input with Internal Reference and Output  
CM<2:0> = 001  
CM<2:0> = 101  
A
CIN-  
A
CIN-  
CIS = 0  
A
COUT  
CIS = 1  
CIN+  
A
COUT  
CIN+  
D
COUT (pin)  
D
COUT (pin)  
From CVREF Module  
Comparator without Output  
Multiplexed Input with Internal Reference  
CM<2:0> = 010  
CM<2:0> = 110  
A
A
CIN-  
CIN-  
CIS = 0  
A
COUT  
CIS = 1  
COUT  
A
CIN+  
CIN+  
I/O  
I/O  
COUT (pin)  
COUT (pin)  
From CVREF Module  
Comparator with Output and Internal Reference  
Comparator Off (Lowest power)  
CM<2:0> = 011  
CM<2:0> = 111  
A
CIN-  
I/O  
I/O  
CIN-  
COUT  
I/O  
(1)  
CIN+  
Off  
CIN+  
D
COUT (pin)  
I/O  
COUT (pin)  
From CVREF Module  
Legend: A = Analog Input, ports always reads ‘0’  
CIS = Comparator Input Switch (CMCON0<3>)  
D = Comparator Digital Output  
I/O = Normal port I/O  
Note 1: Reads as ‘0’, unless CINV = 1.  
DS41232D-page 74  
© 2007 Microchip Technology Inc.  
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