PIC12F1822T-I/MF Microchip Technology, PIC12F1822T-I/MF Datasheet - Page 127
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PIC12F1822T-I/MF
Manufacturer Part Number
PIC12F1822T-I/MF
Description
3.5 KB Flash, 128 Bytes RAM, 32 MHz Int. Osc, 6 I/0, Enhanced Mid Range Core 8 D
Manufacturer
Microchip Technology
Series
PIC® XLP™ 12Fr
Specifications of PIC12F1822T-I/MF
Core Processor
PIC
Core Size
8-Bit
Speed
32MHz
Connectivity
I²C, LIN, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
6
Program Memory Size
3.5KB (2K x 14)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PIC12F1822T-I/MF
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
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12.3
PORTC is a 6-bit wide, bidirectional port. The
corresponding
(Register
corresponding PORTC pin an input (i.e., put the
corresponding output driver in a High-Impedance mode).
Clearing a TRISC bit (= 0) will make the corresponding
PORTC pin an output (i.e., enable the output driver and
put the contents of the output latch on the selected pin).
Example 12-2
Reading the PORTC register
status of the pins, whereas writing to it will write to the
PORT latch. All write operations are read-modify-write
operations. Therefore, a write to a port implies that the
port pins are read, this value is modified and then written
to the PORT data latch (LATC).
The TRISC register
pin output drivers, even when they are being used as
analog inputs. The user should ensure the bits in the
TRISC register are maintained set when using them as
analog inputs. I/O pins configured as analog input always
read ‘0’.
12.3.1
The ANSELC register
configure the Input mode of an I/O pin to analog.
Setting the appropriate ANSELC bit high will cause all
digital reads on the pin to be read as ‘0’ and allow
analog functions on the pin to operate correctly.
The state of the ANSELC bits has no affect on digital out-
put functions. A pin with TRIS clear and ANSELC set will
still operate as a digital output, but the Input mode will be
analog. This can cause unexpected behavior when exe-
cuting read-modify-write instructions on the affected
port.
EXAMPLE 12-2:
2010 Microchip Technology Inc.
BANKSEL PORTC
CLRF
BANKSEL LATC
CLRF
BANKSEL ANSELC
CLRF
BANKSEL TRISB
MOVLW
MOVWF
Note:
PORTC Registers
(PIC16F/LF1823 only)
12-8). Setting a TRISC bit (= 1) will make the
PORTC
LATC
ANSELC
B’00110000’;Set RC<5:4> as inputs
TRISC
ANSELC REGISTER
The ANSELC register must be initialized
to configure an analog channel as a digital
input. Pins configured as analog inputs
will read ‘0’.
shows how to initialize PORTC.
data
(Register
INITIALIZING PORTC
direction
;
;Init PORTC
;Data Latch
;
;Make RC<5:0> digital
;
;and RC<3:0> as outputs
;
(Register
12-8) controls the PORTC
(Register
register
12-10) is used to
PIC12F/LF1822/PIC16F/LF1823
12-7) reads the
is
TRISC
Preliminary
12.3.2
Each PORTC pin is multiplexed with other functions. The
pins, their combined functions and their output priorities
are briefly described here. For additional information,
refer to the appropriate section in this data sheet.
When multiple outputs are enabled, the actual pin
control goes to the peripheral with the lowest number in
the following lists.
Analog input and some digital input functions are not
included in the list below. These input functions can
remain active when the pin is configured as an output.
Certain digital input functions override other port
functions and are included in the priority list.
RC0
1.
2.
RC1
1.
RC2
1.
2.
RC3
1.
RC4
1.
2.
3.
4.
5.
RC5
1.
2.
SCL (MSSP)
SCK (MSSP)
SDA (MSSP)
SDO (MSSP)
P1D
P1C
MDOUT
SRNQ
C2OUT
TX/CK
P1B
RX/DT
CCP1/P1A
PORTC FUNCTIONS AND OUTPUT
PRIORITIES
DS41413B-page 127
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