参数资料
型号: PIC16F676-E/SL
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 20 MHz, RISC MICROCONTROLLER, PDSO14
封装: 3.90 MM, LEAD FREE, PLASTIC, SOIC-14
文件页数: 54/132页
文件大小: 1344K
代理商: PIC16F676-E/SL
PIC16F630/676
DS40039F-page 28
2010 Microchip Technology Inc.
3.3
PORTC
PORTC is a general purpose I/O port consisting of 6
bidirectional pins. The pins can be configured for either
digital I/O or analog input to A/D converter. For specific
information about individual functions such as the
comparator or the A/D, refer to the appropriate section
in this Data Sheet.
EXAMPLE 3-2:
INITIALIZING PORTC
3.3.1
RC0/AN4, RC1/AN5, RC2/AN6, RC3/
AN7
The RC0/RC1/RC2/RC3 pins are configurable to
function as one of the following:
a general purpose I/O
an analog input for the A/D Converter
(PIC16F676 only)
FIGURE 3-6:
BLOCK DIAGRAM OF
RC0/RC1/RC2/RC3 PINs
3.3.2
RC4 AND RC5
The RC4 and RC5 pins are configurable to function as
a general purpose I/Os.
FIGURE 3-7:
BLOCK DIAGRAM OF RC4
AND RC5 PINS
Note:
The ANSEL register (91h) must be clear to
configure an analog channel as a digital
input. Pins configured as analog inputs will
read ‘0’. The ANSEL register is defined for
the PIC16F676.
BCF
STATUS,RP0
;Bank 0
CLRF
PORTC
;Init PORTC
BSF
STATUS,RP0
;Bank 1
CLRF
ANSEL
;digital I/O
MOVLW
0Ch
;Set RC<3:2> as inputs
MOVWF
TRISC
;and set RC<5:4,1:0>
;as outputs
BCF
STATUS,RP0
;Bank 0
I/O Pin
VDD
VSS
D
Q
CK
Q
D
Q
CK
Q
Data bus
WR
PORTC
WR
TRISC
RD
TRISC
To A/D Converter
RD
PORTC
Analog Input
Mode
I/O Pin
VDD
VSS
D
Q
CK
Q
D
Q
CK
Q
Data bus
WR
PORTC
WR
TRISC
RD
TRISC
RD
PORTC
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